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2014/10/15 ¤U¤È 10:10:29

iphone Programming Glossary: instancesrespondtoselector

Alternatives to weak linking in iPhone SDK?

http://stackoverflow.com/questions/3056016/alternatives-to-weak-linking-in-iphone-sdk

that you should be checking the availability of new APIs using methods like NSClassFromString respondsToSelector instancesRespondToSelector etc. Eg. Weak linking against MessageUI.framework an old example but still relevant First check if the MFMailComposerController..

How should I approach building a Universal iOS app that will include iOS 4 features, even though the iPad doesn't yet run iOS 4?

http://stackoverflow.com/questions/3320355/how-should-i-approach-building-a-universal-ios-app-that-will-include-ios-4-featu

following piece of code to conditionally call the method in case it's available on the current device if UIApplication instancesRespondToSelector @selector scheduleLocalNotification UIApplication sharedApplication scheduleLocalNotification n These two techniques are..

cocos2d: playing a video in the background of a menu

http://stackoverflow.com/questions/4454758/cocos2d-playing-a-video-in-the-background-of-a-menu

object moviePlayer if moviePlayer respondsToSelector @selector view if MPMoviePlayerController instancesRespondToSelector @selector view Use the new 3.2 style API moviePlayer.controlStyle MPMovieControlStyleNone moviePlayer.shouldAutoplay FALSE..

Play video by default in full screen

http://stackoverflow.com/questions/5977330/play-video-by-default-in-full-screen

degreesToRadian x M_PI x 180.0 void playMovieAtURL NSURL movieURL if NSClassFromString @ MPMoviePlayerController instancesRespondToSelector @selector view #if __IPHONE_OS_VERSION_MAX_ALLOWED 30200 running iOS 3.2 or better mViewPlayer MPMoviePlayerViewController..

Can you use Objective-C categories to clean up backwards compatibility with older SDKs?

http://stackoverflow.com/questions/7324265/can-you-use-objective-c-categories-to-clean-up-backwards-compatibility-with-olde

even if it compiles fine. So I must write CGFloat scale 1.0 #if __IPHONE_OS_VERSION_MAX_ALLOWED 40000 if UIScreen instancesRespondToSelector @selector scale scale UIScreen mainScreen .scale #endif Saying that I wonder if there is a way to implement CGFloat scale..

iOS4 Implementation of -[NSURLConnection sendAsynchronousRequest:queue:completionHandler:]?

http://stackoverflow.com/questions/9829653/ios4-implementation-of-nsurlconnection-sendasynchronousrequestqueuecompletio

SendAsync void load SEL sendAsyncSelector @selector sendAsynchronousRequest queue completionHandler if NSURLConnection instancesRespondToSelector class_addMethod self class sendAsyncSelector IMP sendAsynchronousRequest4 v@ @@@ @end #endif iphone objective c ios nsurlconnection.. SendAsync void load SEL sendAsyncSelector @selector sendAsynchronousRequest queue completionHandler if NSURLConnection instancesRespondToSelector sendAsyncSelector class_addMethod object_getClass self class sendAsyncSelector IMP sendAsynchronousRequest4 v@ @@@ @end..