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2014/10/15 ¤U¤È 10:13:12
iphone Programming Glossary: recommendsHow to update the value of slider and switch when get back from presentModalViewController? http://stackoverflow.com/questions/11580106/how-to-update-the-value-of-slider-and-switch-when-get-back-from-presentmodalview 2 NSNotificationCenter 3 KVO However for your particular case a modal view the delegation pattern is the one Apple recommends and is the one I would recommend as well. It requires a bit more coding than the other 2 options though. First you have..
How to simplify in app Application Settings management? http://stackoverflow.com/questions/1203266/how-to-simplify-in-app-application-settings-management Uses almost the same plist file as you can use in the Settings app but displays it inside your app. Incidentally Apple recommends including frequently changed settings inside your application. Other stuff should be in the Settings app. share improve..
How to rotate and resize the image view with single finger http://stackoverflow.com/questions/12566791/how-to-rotate-and-resize-the-image-view-with-single-finger UIViewAutoresizingFlexibleWidth UIViewAutoresizingFlexibleHeight otherwise resizing wouldn't work properly. Second I recommends you to use CGAffineTransformMakeRotation and atan2 functions to solve the rotation problem like this float ang atan2 recognizer..
Getting started in Core Data for iPhone? http://stackoverflow.com/questions/1581599/getting-started-in-core-data-for-iphone
When to use a UIView vs. a UIViewController on the iPhone? http://stackoverflow.com/questions/1690852/when-to-use-a-uiview-vs-a-uiviewcontroller-on-the-iphone time and views can contain other views in the same way the main window does being a view itself . The reason Apple recommends to have a UIViewController manage a whole screenful of space is because of the rotation system. Only one UIVC the one attached..
A complete solution to LOCALLY validate an in-app receipts and bundle receipts on iOS 7 http://stackoverflow.com/questions/19943183/a-complete-solution-to-locally-validate-an-in-app-receipts-and-bundle-receipts-o receipt success successBlock failure nil failureBlock is nil intentionally. See below. if verified return Apple recommends to refresh the receipt if validation fails on iOS RMStore defaultStore refreshReceiptOnSuccess ^ RMAppReceipt receipt RMAppReceipt..
BSD Sockets don't behave in a iPhone 3G environment http://stackoverflow.com/questions/2488634/bsd-sockets-dont-behave-in-a-iphone-3g-environment iphone sockets network programming apple share improve this question The CFStream Socket Additions are what Apple recommends you use instead of the direct BSD sockets. They specifically warn about using the BSD sockets here Although BSD POSIX networking..
iPhone Landscape FAQ and Solutions http://stackoverflow.com/questions/2953351/iphone-landscape-faq-and-solutions key to your .plist file key UIInterfaceOrientation key string UIInterfaceOrientationLandscapeRight string Apple recommends starting landscape only applications in Landscape Right mode see the HIG under User Experience Guidelines Start Instantly..
Dismissing UIAlertViews when entering background state http://stackoverflow.com/questions/3105974/dismissing-uialertviews-when-entering-background-state UIAlertViews when entering background state Apple recommends dismissing any UIAlertViews UIActionSheets when entering background state in iOS 4. This is to avoid any confusion on the..
what is the best way to play sound quickly upon fast button presses xcode? http://stackoverflow.com/questions/3128283/what-is-the-best-way-to-play-sound-quickly-upon-fast-button-presses-xcode something against Apple's recommendations in regards to decoding certain files i.e. for multiple sounds at once Apple recommends the CAF format since it is hardware decoded versus software decoded http developer.apple.com iphone library documentation..
how to convert a CVImageBufferRef to UIImage http://stackoverflow.com/questions/3152259/how-to-convert-a-cvimagebufferref-to-uiimage the easiest thing to do would be specify that you want the video frames captured in kCVPixelFormatType_32RGBA . Apple recommends that you capture the video frames in kCVPixelFormatType_32BGRA if you capture it in non planar format at all the reasoning..
iPhone: detecting if a UIAlert/UIActionSheet are open http://stackoverflow.com/questions/4363317/iphone-detecting-if-a-uialert-uiactionsheet-are-open an alert when they open but only to their delegate Check this question for a nice approach to that problem. Techzen recommends setting a boolean flag to YES when you open up the alert and setting it back to NO when you dismiss the alert. EDIT Since..
http://stackoverflow.com/questions/4473894/alternatives-to-creating-an-opengl-texture-from-a-captured-video-frame-to-overla layer OpenGL content over something like AVCaptureVideoPreviewLayer but your performance will suffer. Apple highly recommends that you not overlay non opaque OpenGL ES content on top of other display elements. From the OpenGL ES Programming Guide..
Applying Effect to iPhone Camera Preview “Video” http://stackoverflow.com/questions/4893620/applying-effect-to-iphone-camera-preview-video FPS is very high e.g. 60 and image processing is very slow e.g. 0.5 secs . OLD SOLUTION As Brad pointed out Apple recommends image processing be on a background thread so as to not interfere with the UI responsiveness. I didn't notice much lag in..
How build a custom control in Xcode for the iPhone SDK? http://stackoverflow.com/questions/499494/how-build-a-custom-control-in-xcode-for-the-iphone-sdk
http://stackoverflow.com/questions/5251600/difference-between-accessing-a-property-via-propertyname-versus-self-property
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c most delegate methods you still need to check with respondsToSelector before calling a particular 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..
How to make UIScrollView send scrollViewDidScroll messages during animations http://stackoverflow.com/questions/7319906/how-to-make-uiscrollview-send-scrollviewdidscroll-messages-during-animations fast for the user experience so enclosed a scrollView setContentOffset 320 in an animatedWithDuration block as Apple recommends in the UIView class reference. But... now my scrollViewDidScroll method gets called only once at the beginning of the animation..
http://stackoverflow.com/questions/8146253/animate-change-of-view-controllers-without-using-navigation-controller-stack-su is a pain to manage loaded with little annoyances and in general feels like a bad hack when implementing Apple also recommends against doing this . Presenting a modal view controller again places a view controller on top of another and while it doesn't..
Error creating twitter ACAccount on iOS5: NSURLErrorDomain error -1012 http://stackoverflow.com/questions/8224835/error-creating-twitter-acaccount-on-ios5-nsurlerrordomain-error-1012 Access token and Access token secret when the user is adding a Twitter account. Update You can see how Twitter recommends that you migrate existing accounts to iOS5 system accounts here . That link provided me with the best example of how to..
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