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2014/10/15 ¤U¤È 10:15:29
iphone Programming Glossary: unlikeiPhone Accelerate Framework FFT vs Matlab FFT http://stackoverflow.com/questions/10820488/iphone-accelerate-framework-fft-vs-matlab-fft c matlab fft accelerate framework share improve this question One big problem C arrays are indexed from 0 unlike MATLAB arrays which are 1 based. So you need to change your loop from for int i 1 i 16 i to for int i 0 i 16 i A second..
Is there something like Matlab's eval statement in Objective-C 2.0? http://stackoverflow.com/questions/1116885/is-there-something-like-matlabs-eval-statement-in-objective-c-2-0 No although Objective C is a dynamically typed language it is still a compiled language and not an interpreted one unlike a language such as Javascript or PHP for example. For the above example you could use an array to store pointers to your..
http://stackoverflow.com/questions/1821928/gamekit-wifi-connection peers over WiFi or Bluetooth and find those that are available on either protocol. The documentation is stating that unlike Bluetooth for which GKPeerPickerController provides a UI to enable Bluetooth if it's not already enabled GKPeerPickerController..
What's the difference between an Detail Disclosure Button and an Disclosure Indicator? http://stackoverflow.com/questions/3078665/whats-the-difference-between-an-detail-disclosure-button-and-an-disclosure-indi use a detail disclosure button in a row to display details about the list item. Note that the detail disclosure button unlike the disclosure indicator can perform an action that is separate from the selection of the row. For example in Phone Favorites..
iOS 4: Remote controls for background audio http://stackoverflow.com/questions/3456435/ios-4-remote-controls-for-background-audio audio for an app I'm developing for iOS 4. The app doesn't have a dedicated music player viewController however unlike other background audio apps such as Pandora which makes the task a bit more confusing. I've set the appropriate Info.plist..
Key Value Observing with an NSArray http://stackoverflow.com/questions/3478451/key-value-observing-with-an-nsarray using Key Value Observing with an NSArray or NSMutableArray and apparently you need to use an NSArrayController which unlike KVO I'm not familiar with but I haven't found concrete examples of how to do this. Can anyone explain with some sample code..
http://stackoverflow.com/questions/3605115/how-should-i-architect-my-db-api-server-for-a-turn-based-multiplayer-iphone-bo CouchDB. It's fast reliable and can handle a lot of concurrent HTTP connections. It's probably the best option because unlike Redis it can broadcast a message when a document changes. The continous changes API makes it super simple for you to have..
http://stackoverflow.com/questions/4342565/xcode-basic-game-template
Mobile developer interview questions, that a non-mobile developer can ask [closed] http://stackoverflow.com/questions/4391495/mobile-developer-interview-questions-that-a-non-mobile-developer-can-ask MVC you're all set. If they get dark and uncomfortable looking move on... David and Brad point out that perhaps unlike other programming fields iPhone and Mac programmers almost always have to have a sense of the interface . You just have..
What's the best way to put a c-struct in an NSArray? http://stackoverflow.com/questions/4516991/whats-the-best-way-to-put-a-c-struct-in-an-nsarray Evgen has raised the issue of using STL vector in C . That raises an interesting issue is there a fast c library not unlike STL vector but much much lighter that allows for the minimal tidy handling of arrays ... So the original question... For..
How much of a transition is programming Java to iPhone apps? http://stackoverflow.com/questions/487932/how-much-of-a-transition-is-programming-java-to-iphone-apps correct me but although the Cocoa API appears excellent there seem to be few libraries available outside the framework unlike C or Java . For instance I had to add my own queue and stack classes although the NSMutableArray makes that extremely easy...
Keep two MKMapViews showing the same region http://stackoverflow.com/questions/5922422/keep-two-mkmapviews-showing-the-same-region the gesture recognizer action handler will fire multiple times while the user is panning the map unlike regionDidChangeAnimated which fires only when the pan is finished. You'll need to add a gesture recognizer to one or both..
http://stackoverflow.com/questions/7112058/uilocalnotification-custom-soundname-only-vibrates-phone-when-alertbody-is-speci custom soundName only vibrates phone when alertBody is specified unlike UILocalNotificationDefaultSoundName I have a VoIP app that uses a UILocalNotification to notify the user of an incoming..
IOS: dynamic height with a custom uitableviewcell http://stackoverflow.com/questions/7128215/ios-dynamic-height-with-a-custom-uitableviewcell again when grabbing individual cells. Usually calling reloadData is quite quick and this method unlike its variants doesn't cause any scrolling. See stackoverflow question and answer for useful background. Problems arise if..
Multiple Targets in Xcode: “Failed to launch simulated application: Unknown error.” http://stackoverflow.com/questions/717453/multiple-targets-in-xcode-failed-to-launch-simulated-application-unknown-erro share improve this question You didn't say whether you actually ever added source files to the target. A new target unlike a new project has no source file templates you have to add them yourself. So the Simulator might be telling you you built..
UIScrollView : paging horizontally, scrolling vertically? http://stackoverflow.com/questions/728014/uiscrollview-paging-horizontally-scrolling-vertically will do no harm. But do set delaysContentTouches to NO so that no additional surprise timers interfere. Offtopic unlike you UIScrollView can store touches properly and can reproduce and forward the original touchesBegan event later. It has..
UIImageView only displays when I call initWithImage http://stackoverflow.com/questions/8497311/uiimageview-only-displays-when-i-call-initwithimage you set the image property on an already init'd UIImageView the frame size isn't updated to match the new image size unlike initWithImage . Whenever you have a problem like this it's always worth checking out the docs in case you missed something..
How to programmatically send SMS on the iPhone? http://stackoverflow.com/questions/10848/how-to-programmatically-send-sms-on-the-iphone into your application. You prepopulate the SMS fields then the user can initiate the SMS send within the controller. Unlike using the sms ... url format this allows your application to stay open and allows you to populate both the to and the body..
unichar and NSString - how interchangeable are these? http://stackoverflow.com/questions/1354388/unichar-and-nsstring-how-interchangeable-are-these a unichar or an array of unichars like a C char A unichar is simply a 16bit value that is used to store a character. Unlike an unsigned char which is only 8 bits it can hold more than 0 255 so it can hold unicode characters as well which are 16bits...
iOS 7 dynamic blur effect like in Control Center http://stackoverflow.com/questions/17704240/ios-7-dynamic-blur-effect-like-in-control-center barTintColor. You also may change style of toolbar if you want dark styled blur use UIBarStyleBlack . 2. FXBlurView . Unlike toolbar it more positive but it's dynamic mechanism is rare yet and in fact it can be used only for static background. dynamic..
How to tint UIBarButtonItem background color? http://stackoverflow.com/questions/3274473/how-to-tint-uibarbuttonitem-background-color improve this question I found this solution preferable to those listed here Tint UIButton and UIBarButtonItem . Unlike the accepted answer it allows you to change the color of UIBarButtonItems independent of the UINavigationBar. In case the..
Bindings using Interface Builder (for iPhone apps) http://stackoverflow.com/questions/394408/bindings-using-interface-builder-for-iphone-apps Interface Builder for iPhone apps How does one bind an iPhone SDK control say a UISlider using Interface Builder Unlike regular Cocoa applications the bindings tab does not seem to be present when the iPhone app XIB is opened using Interface..
Trying to overwrite sqlite database in iPhone app update http://stackoverflow.com/questions/5266967/trying-to-overwrite-sqlite-database-in-iphone-app-update to overwrite sqlite database in iPhone app update Unlike most sqlite apps where developers don't want to overwrite data in a sqlite database I'm trying to enable an app to overwrite..
What are the key concepts for an iPhone Developer to learn? [closed] http://stackoverflow.com/questions/5677655/what-are-the-key-concepts-for-an-iphone-developer-to-learn didSelectRow inComponent which will allow that object to do something in response to the action. Memory Management Unlike many languages be it Java Javascript or anything in between usually manage memory for you. On iOS Objective C does not do..
How to eliminate “two-stage rotation” warning? http://stackoverflow.com/questions/6636683/how-to-eliminate-two-stage-rotation-warning through the view property. When deploying a tab bar interface you must install this view as the root of your window. Unlike other view controllers a tab bar interface should never be installed as a child of another view controller. share improve..
Xcode error: Failed to launch simulated application http://stackoverflow.com/questions/822972/xcode-error-failed-to-launch-simulated-application error Failed to launch simulated application Problem Unlike people have asked at here and here I got this error after a brand new installation of Leopard hackintosh this problem really..
iPhone SDK: How do you measure the width and height of a string using Quartz? http://stackoverflow.com/questions/913470/iphone-sdk-how-do-you-measure-the-width-and-height-of-a-string-using-quartz you obtain after layout text metrics but in the rare cases you need them you can obtain before layout text metrics. Unlike Quartz for which you must perform the calculations yourself ATSUI computes the measurements for you. For example you can..
using UINavigationBar without UINavigationController http://stackoverflow.com/questions/9188793/using-uinavigationbar-without-uinavigationcontroller UINavigationBar. When you use a navigation bar as a standalone object you are responsible for providing its contents. Unlike other types of views you do not add subviews to a navigation bar directly. Instead you use a navigation item an instance..
What's the difference between the “global queue” and the “main queue” in GCD? http://stackoverflow.com/questions/9602042/whats-the-difference-between-the-global-queue-and-the-main-queue-in-gcd main thread like you say. The global queues are concurrent queues and from the main page for dispatch_get_global_queue Unlike the main queue or queues allocated with dispatch_queue_create the global concurrent queues schedule blocks as soon as threads..
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