2014/10/15 下午 10:10:33

iphone Programming Glossary: introduces

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

Using and passing a singleton object that manages a stack and from which you retrieve a context typically at best introduces a needless level of indirection and at worst introduces unnecessary application rigidity. No example retrieves the context.. stack and from which you retrieve a context typically at best introduces a needless level of indirection and at worst introduces unnecessary application rigidity. No example retrieves the context using UIApplication delegate managedObjectContext share..

UIStringDrawing methods don't seem to be thread safe in iOS 6

http://stackoverflow.com/questions/12744558/uistringdrawing-methods-dont-seem-to-be-thread-safe-in-ios-6

iphone objective c ios ios6 share improve this question While trying to find a work around I noticed that iOS 6 introduces much more widespread integration of NSAttributedString and Core Text so I tried swapping all UIStringDrawing methods with..

http://stackoverflow.com/questions/18736954/missing-recommended-icon-file-the-bundle-does-not-contain-an-app-icon-for-iph

store is expecting . Xcode 5 app icon Manage If you are using xCode5 The first thing to update is the icons. Xcode 5 introduces Asset Catalogs to simply managing multiple copies of an image such as for multiple resolutions . We 耱l create one to manage..

Center a large UIView using NSLayoutConstraint

http://stackoverflow.com/questions/19243837/center-a-large-uiview-using-nslayoutconstraint

from it's parent then reattach it.. that's how you get rid of it's previous NSConstraints that usually the storyboard introduces that may conflict with your new ones. you also gotta set it's setTranslatesAutoresizingMaskIntoConstraints to NO b c that..

Why does Core Data initialization fail when I attempt to do it at these points?

http://stackoverflow.com/questions/2022432/why-does-core-data-initialization-fail-when-i-attempt-to-do-it-at-these-points

sharedApplication delegate self.managedObjectContext appDelegate managedObjectContext retain This is bad form. It introduces coupling into your design. Use dependency injection just like the example. It makes your app more flexible. Because from..

Best way to programmatically detect iPad/iPhone hardware

http://stackoverflow.com/questions/2862140/best-way-to-programmatically-detect-ipad-iphone-hardware

same height in landscape orientation as it does in portrait. On an iPhone it is different. The iPad programming guide introduces an idiom value to UIDevice UIDevice thisDevice UIDevice currentDevice if thisDevice.userInterfaceIdiom UIUserInterfaceIdiomPad..

C/C++/Obj-C Real-time algorithm to ascertain Note (not Pitch) from Vocal Input

http://stackoverflow.com/questions/4062099/c-c-obj-c-real-time-algorithm-to-ascertain-note-not-pitch-from-vocal-input

to tell whether the sung note is spot on or slightly off. This is not a duplicate of previously asked questions as it introduces the constraints that the sound source is a single human voice hopefully with negligible background interference although..

Invoke native date picker from web-app on iOS/Android

http://stackoverflow.com/questions/4946919/invoke-native-date-picker-from-web-app-on-ios-android

to remove focus before the date picker is shown helps for iOS 4 and does not affect other devices I tested. But it introduces some quick flashing of the keyboard on iOS and things can be even more confusing on first usage as then the date picker..

NSMutableString as retain/copy

http://stackoverflow.com/questions/4995254/nsmutablestring-as-retain-copy

hmm... that's not very clear and not very considerate for clients. it also implies a lot of unnecessary things and introduces additional copy overhead. let's re evaluate this. additional considerations problems at this point the default setter requires..

Implementing my own navigation controller?

http://stackoverflow.com/questions/5222369/implementing-my-own-navigation-controller

I have right now I'm creating the UITabBarController in Interface Builder so I have to change the tab in code. Which introduces another piece of mess and maybe there is room for improvements. But right now I'm satisfied with this solution. NSMutableArray..

iOS based OpenGL ES programming

http://stackoverflow.com/questions/6074688/ios-based-opengl-es-programming

his book on OpenGL ES 2.0 lately as well. For books I highly recommend Philip Rideout's iPhone 3D Programming which introduces fundamentals like the math involved and takes you all the way through to some fairly advanced techniques. It's also one..

NSNumber vs Int

http://stackoverflow.com/questions/6662730/nsnumber-vs-int

allocations locking and ref count ops. Nevertheless tagged pointers are incapable of representing every number and it introduces overhead so you should still favor basic builtins over NSNumber as a default. Tagged pointers are a great optimization where..

iphone:how to archive files while using crash reports in iphone device

http://stackoverflow.com/questions/7090680/iphonehow-to-archive-files-while-using-crash-reports-in-iphone-device

files and where that converted symbolic file is stored iphone xcode share improve this question Xcode 3.2.2 introduces the 輶uild and Archive command to aid in this process. When you use the Build and Archive command Xcode will gather the application..

is it ok to use of a notification to communication back to the main thread of an IOS app? (cf performSelectorOnMainThread)

http://stackoverflow.com/questions/8032652/is-it-ok-to-use-of-a-notification-to-communication-back-to-the-main-thread-of-an

void helperMethod NSNotificationCenter defaultCenter postNotificationName @ SOMENAME object self Unfortunately this introduces a subtle coupling between the sender and receiver in that you are modifying the sender to accommodate the receiver. An even..

storing data locally on the iphone

http://stackoverflow.com/questions/8040065/storing-data-locally-on-the-iphone

question For simple data you should use NSUserDefaults. CoreData is very cool but mainly to store DB structures and introduces complexity but i love it . If you just need to store String Array and so on basically prefs you can go with NSUserDefaults..

How can I use a 3-D texture in iOS?

http://stackoverflow.com/questions/9241583/how-can-i-use-a-3-d-texture-in-ios

at the time of writing iOS 7 the iPhone 5s the second generation iPad Mini and the iPad Air all support ES 3.0. 3.0 introduces the GL_TEXTURE_3D target. So you can use 3d texturing directly on those devices and probably all future iOS devices. And..