¡@
2014/10/15 ¤U¤È 10:10:29
iphone Programming Glossary: insteadHow to programmatically send SMS on the iPhone? http://stackoverflow.com/questions/10848/how-to-programmatically-send-sms-on-the-iphone for automated or even partially automated SMS and dialing operations. Imagine if the game instead dialed 911 at a particular time of day Your best bet is to setup an intermediate server on the internet..
iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate] http://stackoverflow.com/questions/12396545/ios-6-apps-how-to-deal-with-iphone-5-screen-size support iOS 6 then definitely consider using Auto Layout. It removes all fixed layout handling and instead uses constraints to lay things out. Nothing will be hard coded and your life will become a lot simpler...
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing Disappear methods are not invoked. You need to use the navigation controller delegate methods instead navigationController willShowViewController animated navigationController didShowViewController animated..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone what we're doing is making a second pointer that divides the byteData's units differently instead of dividing each unit as 1 byte we will divide each unit as 3 bytes 1 pixel . pixelData RGBPixel pixelByteData..
How do I detect when someone shakes an iPhone? http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone event simply by subclassing the view with only these methods and then selecting this new type instead of the base type in IB or using it when allocating a view . In the view controller you want to set this..
How can I get a writable path on the iPhone? http://stackoverflow.com/questions/1567134/how-can-i-get-a-writable-path-on-the-iphone are trying to write an image into the photo library you cannot use file system calls to do this instead you have to have a UIImage in memory and use the UIImageWriteToSavedPhotosAlbum function call defined..
http://stackoverflow.com/questions/158914/cropping-a-uiimage something that's larger than the bounds of my image context. I was hoping this was Kosher but am I instead attempting to draw over other memory that I shouldn't be touching Theory 2 I'm doing all of this in..
Detecting which UIButton was pressed in a UITableView http://stackoverflow.com/questions/1802707/detecting-which-uibutton-was-pressed-in-a-uitableview to note is that I can't set the tag in the creation of the cell since the cell might be dequeued instead. It feels very dirty. There must be a better way. iphone uitableview uitableviewcell share improve..
Objective-C categories in static library http://stackoverflow.com/questions/2567498/objective-c-categories-in-static-library qa1490.html Objective C does not define linker symbols for each function or method in Objective C instead linker symbols are only generated for each class. If you extend a pre existing class with categories..
This class is not key value coding-compliant for the key http://stackoverflow.com/questions/3088059/this-class-is-not-key-value-coding-compliant-for-the-key It is caused by the Second view controller in MainWindow.xib having a class of UIViewController instead of SecondView . Changing to the correct class resolves the problem. By the way it is bad practice to..
How do you use NSAttributedString? http://stackoverflow.com/questions/3482346/how-do-you-use-nsattributedstring caveat implementor Obviously you're not going to hard code in the ranges like this. Perhaps instead you could do something like NSDictionary wordToColorMapping .... an NSDictionary of NSString UIColor..
Build fat static library (device + simulator) using Xcode and SDK 4+ http://stackoverflow.com/questions/3520977/build-fat-static-library-device-simulator-using-xcode-and-sdk-4 that means it only works on his machine he should be using BUILT_PRODUCTS_DIR and or BUILD_DIR instead of guesstimating them Apple's latest Xcode prevents you from doing what he's done it simply will not..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints generate two to three images in advance in a separate thread. I don't overlay with a UIImage but instead draw the image in the layer when zooming is 1. Those tiles will be released automatically when memory..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll path before I change too much code. I'm confused because so many of the examples are array based instead of CoreData. Here are some questions Do I need to have a second NSFetchedResultsController that retrieves..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers great to see that you're doing this research and seem concerned with learning how to do it right instead of just hacking it together. First I agree with the previous answers which focus on the importance of..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root need to push their respective detail views to self.tabBarController.navigationController instead of self.navigationController . iphone cocoa touch uitabbarcontroller uinavigationbar share improve..
How do I set up a simple delegate to communicate between two view controllers? http://stackoverflow.com/questions/6168919/how-do-i-set-up-a-simple-delegate-to-communicate-between-two-view-controllers http stackoverflow.com a 4796131 263871 for the rationale Tip If you're not using ARC use `assign` instead of `weak` @property nonatomic weak id ChildViewControllerDelegate delegate A simple IBAction method..
iPhone UIView Animation Best Practice http://stackoverflow.com/questions/630265/iphone-uiview-animation-best-practice method is discouraged in iPhone OS 4.0 and later. You should use the block based animation methods instead. Eg of Block based Animation based on Tom's Comment UIView transitionWithView mysuperview duration 0.75..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring or understanding. Need someone to help me out. Edit Instead of AF_LINK I tried AF_INET sockaddr_in instead of sockaddr_dl . This crashes the application. iphone ios sockets share improve this question The..
iPhone: How to load a View using a nib file created with Interface Builder http://stackoverflow.com/questions/863321/iphone-how-to-load-a-view-using-a-nib-file-created-with-interface-builder interface builder share improve this question There is also an easier way to access the view instead of dealing with the nib as an array. 1 Create a custom View subclass with any outlets that you want..
http://stackoverflow.com/questions/1166444/mkmapview-zoom-and-region First of all MKMapView does not use have a predefined set of zoom levels like Google Maps does. Instead the visible area of a MKMapView is described using MKCoordinateRegion which consists of two values center..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application show the stack principally the managed object context is not retrieved directly from the stack . Instead the context is passed to the first view controller and from them on a context or a managed object is..
Get to UIViewController from UIView on iPhone? http://stackoverflow.com/questions/1340434/get-to-uiviewcontroller-from-uiview-on-iphone in Interface Builder this is not recommended. The view should not know about the view controller. Instead you should do as @Phil M suggests and create a protocol to be used as the delegate. share improve this..
iOS crash reports: atos not working as expected http://stackoverflow.com/questions/13574933/ios-crash-reports-atos-not-working-as-expected is not even from the same class that's mentioned in the crash log MyViewController MyImageTask . Instead atos points me to totally benign lines of code in a completely unrelated class. I verified again that..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking the sweepstakes and buying the dvd were not main features. Nothing else required internet access. Instead of adding more code we just set the background of both internet views to a notice telling the users..
Rounded UIView using CALayers - only some corners - How? http://stackoverflow.com/questions/2264083/rounded-uiview-using-calayers-only-some-corners-how darkGrayColor CGColor Above code is applying the roundness to each of corners of supplied View. Instead I just wanted to apply roundness to selected corners like top top left bottom right etc. Is it possible..
http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th by the system. As such you cannot easily detect orientation before a view controller loads. Instead you hardwire the app to start in a particular orientation usually portrait and then immediately rotate...
Universal iPhone/iPad application debug compilation error for iPhone testing http://stackoverflow.com/questions/2618889/universal-iphone-ipad-application-debug-compilation-error-for-iphone-testing I seem unable to run the iPhone simulator with this code as it always defaults to the iPad Instead I tried to run on the device and as it begins to run I get the following error dyld Symbol not found..
iPhone Landscape FAQ and Solutions http://stackoverflow.com/questions/2953351/iphone-landscape-faq-and-solutions The best solution I have found so far is a modification of the MasterViewController workaround. Instead of using a custom MasterViewController a UINavigationController with hidden Navigation Bar and hidden..
display image from URL retrieved from ALAsset in iPhone http://stackoverflow.com/questions/3837115/display-image-from-url-retrieved-from-alasset-in-iphone the rules slightly and you dont get direct file system access to the iPhoto library any more. Instead you get asset library URL's like this. assets library asset asset.JPG id 1000000003 ext JPG You use..
Return to app behavior after phone call different in native code than UIWebView http://stackoverflow.com/questions/5317783/return-to-app-behavior-after-phone-call-different-in-native-code-than-uiwebview but you don't have to actually display the UIWebView to get its tel URL handling behavior. Instead just load a tel URL request in an instance of UIWebView without adding it to your view hierarchy. For..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers controller shouldn't look up the objects it needs to do its job e.g. reference a global variable . Instead you should always inject those dependencies into the controller i.e. pass in the objects it needs via.. method comparable to a global variable BookWarehouse warehouse BookWarehouse getSingleton ... Instead the dependencies should be injected like this @implementation BookPickerViewController void initWithWarehouse..
Example or explanation of Core Data Migration with multiple passes? http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes just a merge of the first two code examples. The third and last part will be modified as follows Instead of using the class method of the NSMappingModel class mappingModelFromBundles forSourceModel destinationModel..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c more precise doesn't mess with NSObject and can provide better tool support. Speed Optimizations Instead of checking whether a delegate responds to a selector every time we want to message it you can cache..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature See the accepted answer below. iphone ios locale nsdateformatter share improve this question Instead of subclassing you could create an NSDateFormatter category with an additional initializer that takes..
Open Source Cocoa/Cocoa-Touch POP3/SMTP library? http://stackoverflow.com/questions/740939/open-source-cocoa-cocoa-touch-pop3-smtp-library Touch POP3 SMTP library I'm looking to write a sample application speaking to a POP3 SMTP server. Instead of re inventing the wheel with BSD sockets and CFNetwork type calls I'm curious if there is currently..
Using HTML and Local Images Within UIWebView http://stackoverflow.com/questions/747407/using-html-and-local-images-within-uiwebview question Using relative paths or file paths to refer to images does not work with UIWebView. Instead you have to load the HTML into the view with the correct baseURL NSString path NSBundle mainBundle bundlePath..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample local files and directories and iCloud files and directories is the URL you use to access them. Instead of URLs being relative to your app ™s sandbox URLs for iCloud files and directories are relative to the..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring . May be I'm wrong in the implementation or understanding. Need someone to help me out. Edit Instead of AF_LINK I tried AF_INET sockaddr_in instead of sockaddr_dl . This crashes the application. iphone..
How to programmatically send SMS on the iPhone? http://stackoverflow.com/questions/10848/how-to-programmatically-send-sms-on-the-iphone If you sign up now you'll get 3 200 RB points Apple has restrictions for automated or even partially automated SMS and dialing operations. Imagine if the game instead dialed 911 at a particular time of day Your best bet is to setup an intermediate server on the internet that uses an online SMS sending service and send the SMSs..
iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate] http://stackoverflow.com/questions/12396545/ios-6-apps-how-to-deal-with-iphone-5-screen-size points in height would simply be black. If you only plan to support iOS 6 then definitely consider using Auto Layout. It removes all fixed layout handling and instead uses constraints to lay things out. Nothing will be hard coded and your life will become a lot simpler. However if you have to support older iOS's then it really..
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone Cast a pointer to the first element of pixelByteData Essentially what we're doing is making a second pointer that divides the byteData's units differently instead of dividing each unit as 1 byte we will divide each unit as 3 bytes 1 pixel . pixelData RGBPixel pixelByteData Now you can access pixels by index pixelData index..
How do I detect when someone shakes an iPhone? http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone any UIView even system views into a view that can get the shake event simply by subclassing the view with only these methods and then selecting this new type instead of the base type in IB or using it when allocating a view . In the view controller you want to set this view to become first responder void viewWillAppear BOOL..
How can I get a writable path on the iPhone? http://stackoverflow.com/questions/1567134/how-can-i-get-a-writable-path-on-the-iphone string above is using assuming one has been created . If you are trying to write an image into the photo library you cannot use file system calls to do this instead you have to have a UIImage in memory and use the UIImageWriteToSavedPhotosAlbum function call defined by UIKit. You have no control over the destination format..
http://stackoverflow.com/questions/158914/cropping-a-uiimage the image I set the CGRect argument passed to drawInRect to something that's larger than the bounds of my image context. I was hoping this was Kosher but am I instead attempting to draw over other memory that I shouldn't be touching Theory 2 I'm doing all of this in a background thread. I know there are portions of UIKit that..
Detecting which UIButton was pressed in a UITableView http://stackoverflow.com/questions/1802707/detecting-which-uibutton-was-pressed-in-a-uitableview button UIButton sender int row button.tag What's important to note is that I can't set the tag in the creation of the cell since the cell might be dequeued instead. It feels very dirty. There must be a better way. iphone uitableview uitableviewcell share improve this question In Apple's Accessory sample the following..
Objective-C categories in static library http://stackoverflow.com/questions/2567498/objective-c-categories-in-static-library Q A QA1490 http developer.apple.com mac library qa qa2006 qa1490.html Objective C does not define linker symbols for each function or method in Objective C instead linker symbols are only generated for each class. If you extend a pre existing class with categories the linker does not know to associate the object code of the..
This class is not key value coding-compliant for the key http://stackoverflow.com/questions/3088059/this-class-is-not-key-value-coding-compliant-for-the-key class is not key value coding compliant for the key string.' It is caused by the Second view controller in MainWindow.xib having a class of UIViewController instead of SecondView . Changing to the correct class resolves the problem. By the way it is bad practice to have names like string in Objective C. It invites a runtime..
How do you use NSAttributedString? http://stackoverflow.com/questions/3482346/how-do-you-use-nsattributedstring value UIColor blueColor range NSMakeRange 11 5 typed in a browser. caveat implementor Obviously you're not going to hard code in the ranges like this. Perhaps instead you could do something like NSDictionary wordToColorMapping .... an NSDictionary of NSString UIColor pairs NSMutableAttributedString string NSMutableAttributedString..
Build fat static library (device + simulator) using Xcode and SDK 4+ http://stackoverflow.com/questions/3520977/build-fat-static-library-device-simulator-using-xcode-and-sdk-4 04 universal static libraries There's some bugs in his script that means it only works on his machine he should be using BUILT_PRODUCTS_DIR and or BUILD_DIR instead of guesstimating them Apple's latest Xcode prevents you from doing what he's done it simply will not work due to the Documented change in how Xcode processes targets..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints except I cache the generated image on the disk and always generate two to three images in advance in a separate thread. I don't overlay with a UIImage but instead draw the image in the layer when zooming is 1. Those tiles will be released automatically when memory warnings are issued. Whenever the user start zooming I acquire..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll the primary TableView. I want to make sure I'm on the right path before I change too much code. I'm confused because so many of the examples are array based instead of CoreData. Here are some questions Do I need to have a second NSFetchedResultsController that retrieves only the matching items or can I use the same one as the..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers improve this question These are good questions and its great to see that you're doing this research and seem concerned with learning how to do it right instead of just hacking it together. First I agree with the previous answers which focus on the importance of putting data in model objects when appropriate per the MVC..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root tab's navigation item and the individual tab's table controller's need to push their respective detail views to self.tabBarController.navigationController instead of self.navigationController . iphone cocoa touch uitabbarcontroller uinavigationbar share improve this question The two previous answers got it right I don't..
How do I set up a simple delegate to communicate between two view controllers? http://stackoverflow.com/questions/6168919/how-do-i-set-up-a-simple-delegate-to-communicate-between-two-view-controllers Delegate properties should always be weak references See http stackoverflow.com a 4796131 263871 for the rationale Tip If you're not using ARC use `assign` instead of `weak` @property nonatomic weak id ChildViewControllerDelegate delegate A simple IBAction method that I'll associate with a close button in the UI. We'll call..
iPhone UIView Animation Best Practice http://stackoverflow.com/questions/630265/iphone-uiview-animation-best-practice about the beginAnimations context method Use of this method is discouraged in iPhone OS 4.0 and later. You should use the block based animation methods instead. Eg of Block based Animation based on Tom's Comment UIView transitionWithView mysuperview duration 0.75 options UIViewAnimationTransitionFlipFromRight animations..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring and ifi_ibytes . May be I'm wrong in the implementation or understanding. Need someone to help me out. Edit Instead of AF_LINK I tried AF_INET sockaddr_in instead of sockaddr_dl . This crashes the application. iphone ios sockets share improve this question The thing is that pdp_ip0 is one of interfaces all pdpXXX are..
iPhone: How to load a View using a nib file created with Interface Builder http://stackoverflow.com/questions/863321/iphone-how-to-load-a-view-using-a-nib-file-created-with-interface-builder Any ideas Thanks Gonso iphone objective c ios cocoa touch interface builder share improve this question There is also an easier way to access the view instead of dealing with the nib as an array. 1 Create a custom View subclass with any outlets that you want to have access to later. MyView 2 in the UIViewController that..
http://stackoverflow.com/questions/1166444/mkmapview-zoom-and-region iphone cocoa touch mapkit zoom share improve this question First of all MKMapView does not use have a predefined set of zoom levels like Google Maps does. Instead the visible area of a MKMapView is described using MKCoordinateRegion which consists of two values center the center point of the region and span the size of the..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application application delegate. Importantly however as all the examples show the stack principally the managed object context is not retrieved directly from the stack . Instead the context is passed to the first view controller and from them on a context or a managed object is passed from one view controller to the next as described in..
Get to UIViewController from UIView on iPhone? http://stackoverflow.com/questions/1340434/get-to-uiviewcontroller-from-uiview-on-iphone
iOS crash reports: atos not working as expected http://stackoverflow.com/questions/13574933/ios-crash-reports-atos-not-working-as-expected 0x0004fb26 I get completely different match. The atos output is not even from the same class that's mentioned in the crash log MyViewController MyImageTask . Instead atos points me to totally benign lines of code in a completely unrelated class. I verified again that I'm working with the exact dSYM and IPA that I submitted to..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking The two features that required internet access entering the sweepstakes and buying the dvd were not main features. Nothing else required internet access. Instead of adding more code we just set the background of both internet views to a notice telling the users they must be connected to the internet to use this feature...
Rounded UIView using CALayers - only some corners - How? http://stackoverflow.com/questions/2264083/rounded-uiview-using-calayers-only-some-corners-how 5.0 l setBorderWidth 2.0 l setBorderColor UIColor darkGrayColor CGColor Above code is applying the roundness to each of corners of supplied View. Instead I just wanted to apply roundness to selected corners like top top left bottom right etc. Is it possible IF yes then How Thanks in advance for sharing your knowledge...
http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th you query but rather part of the messages sent the controller by the system. As such you cannot easily detect orientation before a view controller loads. Instead you hardwire the app to start in a particular orientation usually portrait and then immediately rotate. See mobile Safari. It always starts in portrait and then..
Universal iPhone/iPad application debug compilation error for iPhone testing http://stackoverflow.com/questions/2618889/universal-iphone-ipad-application-debug-compilation-error-for-iphone-testing on Xcode but I would now like to test the iPhone functionality. I seem unable to run the iPhone simulator with this code as it always defaults to the iPad Instead I tried to run on the device and as it begins to run I get the following error dyld Symbol not found _OBJC_CLASS_ _UISplitViewController Referenced from var mobile..
iPhone Landscape FAQ and Solutions http://stackoverflow.com/questions/2953351/iphone-landscape-faq-and-solutions interface orientation is not an option either. The solution The best solution I have found so far is a modification of the MasterViewController workaround. Instead of using a custom MasterViewController a UINavigationController with hidden Navigation Bar and hidden Tab Bar is used. If all other views are pushed popped from..
display image from URL retrieved from ALAsset in iPhone http://stackoverflow.com/questions/3837115/display-image-from-url-retrieved-from-alasset-in-iphone image url share improve this question The API has changed the rules slightly and you dont get direct file system access to the iPhoto library any more. Instead you get asset library URL's like this. assets library asset asset.JPG id 1000000003 ext JPG You use the ALAssetLibrary object to access the ALAsset object via the..
Return to app behavior after phone call different in native code than UIWebView http://stackoverflow.com/questions/5317783/return-to-app-behavior-after-phone-call-different-in-native-code-than-uiwebview . Using a UIWebView instead of a UILabel might have some downsides but you don't have to actually display the UIWebView to get its tel URL handling behavior. Instead just load a tel URL request in an instance of UIWebView without adding it to your view hierarchy. For example #import Foundation Foundation.h #import UIKit UIKit.h..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers design pattern. In a nutshell this means that your controller shouldn't look up the objects it needs to do its job e.g. reference a global variable . Instead you should always inject those dependencies into the controller i.e. pass in the objects it needs via methods . If you follow the dependency injection pattern your.. so I'm going to look it up using the BookWarehouse class method comparable to a global variable BookWarehouse warehouse BookWarehouse getSingleton ... Instead the dependencies should be injected like this @implementation BookPickerViewController void initWithWarehouse BookWarehouse warehouse myBookWarehouse is an instance..
Example or explanation of Core Data Migration with multiple passes? http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes It can be found at Customizing the Migration Process it's just a merge of the first two code examples. The third and last part will be modified as follows Instead of using the class method of the NSMappingModel class mappingModelFromBundles forSourceModel destinationModel we will use the initWithContentsOfURL because the..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c method on it. Apple recommends this method because it is more precise doesn't mess with NSObject and can provide better tool support. Speed Optimizations Instead of checking whether a delegate responds to a selector every time we want to message it you can cache that information when delegates are set. One very clean way..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature strange about an init method in a category. Final answer See the accepted answer below. iphone ios locale nsdateformatter share improve this question Instead of subclassing you could create an NSDateFormatter category with an additional initializer that takes care of assigning the locale and possibly also a format string..
Open Source Cocoa/Cocoa-Touch POP3/SMTP library? http://stackoverflow.com/questions/740939/open-source-cocoa-cocoa-touch-pop3-smtp-library Source Cocoa Cocoa Touch POP3 SMTP library I'm looking to write a sample application speaking to a POP3 SMTP server. Instead of re inventing the wheel with BSD sockets and CFNetwork type calls I'm curious if there is currently any open source libraries that already take care of alot of..
Using HTML and Local Images Within UIWebView http://stackoverflow.com/questions/747407/using-html-and-local-images-within-uiwebview Any ideas iphone html uikit uiwebview share improve this question Using relative paths or file paths to refer to images does not work with UIWebView. Instead you have to load the HTML into the view with the correct baseURL NSString path NSBundle mainBundle bundlePath NSURL baseURL NSURL fileURLWithPath path webView loadHTMLString..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample operations you might want to do. The only differences between local files and directories and iCloud files and directories is the URL you use to access them. Instead of URLs being relative to your app ™s sandbox URLs for iCloud files and directories are relative to the corresponding iCloud container directory. To move a file..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring internet I still get value added to ifi_obytes and ifi_ibytes . May be I'm wrong in the implementation or understanding. Need someone to help me out. Edit Instead of AF_LINK I tried AF_INET sockaddr_in instead of sockaddr_dl . This crashes the application. iphone ios sockets share improve this question The thing is that..
How to programmatically send SMS on the iPhone? http://stackoverflow.com/questions/10848/how-to-programmatically-send-sms-on-the-iphone Apple has restrictions for automated or even partially automated SMS and dialing operations. Imagine if the game instead dialed 911 at a particular time of day Your best bet is to setup an intermediate server on the internet that uses an online..
iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate] http://stackoverflow.com/questions/12396545/ios-6-apps-how-to-deal-with-iphone-5-screen-size If you only plan to support iOS 6 then definitely consider using Auto Layout. It removes all fixed layout handling and instead uses constraints to lay things out. Nothing will be hard coded and your life will become a lot simpler. However if you have..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone of pixelByteData Essentially what we're doing is making a second pointer that divides the byteData's units differently instead of dividing each unit as 1 byte we will divide each unit as 3 bytes 1 pixel . pixelData RGBPixel pixelByteData Now you can..
How do I detect when someone shakes an iPhone? http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone that can get the shake event simply by subclassing the view with only these methods and then selecting this new type instead of the base type in IB or using it when allocating a view . In the view controller you want to set this view to become first..
How can I get a writable path on the iPhone? http://stackoverflow.com/questions/1567134/how-can-i-get-a-writable-path-on-the-iphone been created . If you are trying to write an image into the photo library you cannot use file system calls to do this instead you have to have a UIImage in memory and use the UIImageWriteToSavedPhotosAlbum function call defined by UIKit. You have..
http://stackoverflow.com/questions/158914/cropping-a-uiimage to drawInRect to something that's larger than the bounds of my image context. I was hoping this was Kosher but am I instead attempting to draw over other memory that I shouldn't be touching Theory 2 I'm doing all of this in a background thread...
Detecting which UIButton was pressed in a UITableView http://stackoverflow.com/questions/1802707/detecting-which-uibutton-was-pressed-in-a-uitableview What's important to note is that I can't set the tag in the creation of the cell since the cell might be dequeued instead. It feels very dirty. There must be a better way. iphone uitableview uitableviewcell share improve this question In..
Objective-C categories in static library http://stackoverflow.com/questions/2567498/objective-c-categories-in-static-library library qa qa2006 qa1490.html Objective C does not define linker symbols for each function or method in Objective C instead linker symbols are only generated for each class. If you extend a pre existing class with categories the linker does not..
This class is not key value coding-compliant for the key http://stackoverflow.com/questions/3088059/this-class-is-not-key-value-coding-compliant-for-the-key for the key string.' It is caused by the Second view controller in MainWindow.xib having a class of UIViewController instead of SecondView . Changing to the correct class resolves the problem. By the way it is bad practice to have names like string..
How do you use NSAttributedString? http://stackoverflow.com/questions/3482346/how-do-you-use-nsattributedstring 11 5 typed in a browser. caveat implementor Obviously you're not going to hard code in the ranges like this. Perhaps instead you could do something like NSDictionary wordToColorMapping .... an NSDictionary of NSString UIColor pairs NSMutableAttributedString..
Build fat static library (device + simulator) using Xcode and SDK 4+ http://stackoverflow.com/questions/3520977/build-fat-static-library-device-simulator-using-xcode-and-sdk-4 some bugs in his script that means it only works on his machine he should be using BUILT_PRODUCTS_DIR and or BUILD_DIR instead of guesstimating them Apple's latest Xcode prevents you from doing what he's done it simply will not work due to the Documented..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints the disk and always generate two to three images in advance in a separate thread. I don't overlay with a UIImage but instead draw the image in the layer when zooming is 1. Those tiles will be released automatically when memory warnings are issued...
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll sure I'm on the right path before I change too much code. I'm confused because so many of the examples are array based instead of CoreData. Here are some questions Do I need to have a second NSFetchedResultsController that retrieves only the matching..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers questions and its great to see that you're doing this research and seem concerned with learning how to do it right instead of just hacking it together. First I agree with the previous answers which focus on the importance of putting data in model..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root tab's table controller's need to push their respective detail views to self.tabBarController.navigationController instead of self.navigationController . iphone cocoa touch uitabbarcontroller uinavigationbar share improve this question The..
How do I set up a simple delegate to communicate between two view controllers? http://stackoverflow.com/questions/6168919/how-do-i-set-up-a-simple-delegate-to-communicate-between-two-view-controllers weak references See http stackoverflow.com a 4796131 263871 for the rationale Tip If you're not using ARC use `assign` instead of `weak` @property nonatomic weak id ChildViewControllerDelegate delegate A simple IBAction method that I'll associate..
iPhone UIView Animation Best Practice http://stackoverflow.com/questions/630265/iphone-uiview-animation-best-practice method Use of this method is discouraged in iPhone OS 4.0 and later. You should use the block based animation methods instead. Eg of Block based Animation based on Tom's Comment UIView transitionWithView mysuperview duration 0.75 options UIViewAnimationTransitionFlipFromRight..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring the implementation or understanding. Need someone to help me out. Edit Instead of AF_LINK I tried AF_INET sockaddr_in instead of sockaddr_dl . This crashes the application. iphone ios sockets share improve this question The thing is that pdp_ip0..
iPhone: How to load a View using a nib file created with Interface Builder http://stackoverflow.com/questions/863321/iphone-how-to-load-a-view-using-a-nib-file-created-with-interface-builder c ios cocoa touch interface builder share improve this question There is also an easier way to access the view instead of dealing with the nib as an array. 1 Create a custom View subclass with any outlets that you want to have access to later...
http://stackoverflow.com/questions/1166444/mkmapview-zoom-and-region this question First of all MKMapView does not use have a predefined set of zoom levels like Google Maps does. Instead the visible area of a MKMapView is described using MKCoordinateRegion which consists of two values center the center point..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application as all the examples show the stack principally the managed object context is not retrieved directly from the stack . Instead the context is passed to the first view controller and from them on a context or a managed object is passed from one view..
Get to UIViewController from UIView on iPhone? http://stackoverflow.com/questions/1340434/get-to-uiviewcontroller-from-uiview-on-iphone
iOS crash reports: atos not working as expected http://stackoverflow.com/questions/13574933/ios-crash-reports-atos-not-working-as-expected The atos output is not even from the same class that's mentioned in the crash log MyViewController MyImageTask . Instead atos points me to totally benign lines of code in a completely unrelated class. I verified again that I'm working with the..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking access entering the sweepstakes and buying the dvd were not main features. Nothing else required internet access. Instead of adding more code we just set the background of both internet views to a notice telling the users they must be connected..
Rounded UIView using CALayers - only some corners - How? http://stackoverflow.com/questions/2264083/rounded-uiview-using-calayers-only-some-corners-how setBorderColor UIColor darkGrayColor CGColor Above code is applying the roundness to each of corners of supplied View. Instead I just wanted to apply roundness to selected corners like top top left bottom right etc. Is it possible IF yes then How..
http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th sent the controller by the system. As such you cannot easily detect orientation before a view controller loads. Instead you hardwire the app to start in a particular orientation usually portrait and then immediately rotate. See mobile Safari...
Universal iPhone/iPad application debug compilation error for iPhone testing http://stackoverflow.com/questions/2618889/universal-iphone-ipad-application-debug-compilation-error-for-iphone-testing the iPhone functionality. I seem unable to run the iPhone simulator with this code as it always defaults to the iPad Instead I tried to run on the device and as it begins to run I get the following error dyld Symbol not found _OBJC_CLASS_ _UISplitViewController..
iPhone Landscape FAQ and Solutions http://stackoverflow.com/questions/2953351/iphone-landscape-faq-and-solutions either. The solution The best solution I have found so far is a modification of the MasterViewController workaround. Instead of using a custom MasterViewController a UINavigationController with hidden Navigation Bar and hidden Tab Bar is used. If..
display image from URL retrieved from ALAsset in iPhone http://stackoverflow.com/questions/3837115/display-image-from-url-retrieved-from-alasset-in-iphone The API has changed the rules slightly and you dont get direct file system access to the iPhoto library any more. Instead you get asset library URL's like this. assets library asset asset.JPG id 1000000003 ext JPG You use the ALAssetLibrary object..
Return to app behavior after phone call different in native code than UIWebView http://stackoverflow.com/questions/5317783/return-to-app-behavior-after-phone-call-different-in-native-code-than-uiwebview might have some downsides but you don't have to actually display the UIWebView to get its tel URL handling behavior. Instead just load a tel URL request in an instance of UIWebView without adding it to your view hierarchy. For example #import Foundation..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers means that your controller shouldn't look up the objects it needs to do its job e.g. reference a global variable . Instead you should always inject those dependencies into the controller i.e. pass in the objects it needs via methods . If you follow.. the BookWarehouse class method comparable to a global variable BookWarehouse warehouse BookWarehouse getSingleton ... Instead the dependencies should be injected like this @implementation BookPickerViewController void initWithWarehouse BookWarehouse..
Example or explanation of Core Data Migration with multiple passes? http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes Process it's just a merge of the first two code examples. The third and last part will be modified as follows Instead of using the class method of the NSMappingModel class mappingModelFromBundles forSourceModel destinationModel we will use..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c method because it is more precise doesn't mess with NSObject and can provide better tool support. Speed Optimizations Instead of checking whether a delegate responds to a selector every time we want to message it you can cache that information when..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature Final answer See the accepted answer below. iphone ios locale nsdateformatter share improve this question Instead of subclassing you could create an NSDateFormatter category with an additional initializer that takes care of assigning..
Open Source Cocoa/Cocoa-Touch POP3/SMTP library? http://stackoverflow.com/questions/740939/open-source-cocoa-cocoa-touch-pop3-smtp-library Source Cocoa Cocoa Touch POP3 SMTP library I'm looking to write a sample application speaking to a POP3 SMTP server. Instead of re inventing the wheel with BSD sockets and CFNetwork type calls I'm curious if there is currently any open source libraries..
Using HTML and Local Images Within UIWebView http://stackoverflow.com/questions/747407/using-html-and-local-images-within-uiwebview share improve this question Using relative paths or file paths to refer to images does not work with UIWebView. Instead you have to load the HTML into the view with the correct baseURL NSString path NSBundle mainBundle bundlePath NSURL baseURL..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample differences between local files and directories and iCloud files and directories is the URL you use to access them. Instead of URLs being relative to your app ™s sandbox URLs for iCloud files and directories are relative to the corresponding iCloud..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring ifi_obytes and ifi_ibytes . May be I'm wrong in the implementation or understanding. Need someone to help me out. Edit Instead of AF_LINK I tried AF_INET sockaddr_in instead of sockaddr_dl . This crashes the application. iphone ios sockets share..
|