iphone - Why does animationDidStart: not work? -

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Triangle to inform me when the animation is up and running, so my code is: 

  [UIView Set Delegate Animation: self]; [UIView Set AnimationDedstopSchil: @Selector (AnimationDidtop: Ended :)); [UIView Set AnimationVirstreet Selector: @Selector (AnimationDidStart :)];

I apply these 2 methods, but the animation_desktop: end: was notified, and animationAdstart: was not.

This is my implementation: 

  - (zero) animation add desktop: (animation) * Anime ends: (BOOL) flag {} - (zero) animationDadStart: ( Cannimation *) Animation {}

When I tried to call the animation animationEditart: or then the edition ended: directly, mine The app crashed and reported that the selector could not be found. But according to the following lines in CAAnimation.h, if I import the Quasak Framework, then all the examples of NSObject should respond to these 2 methods. Is my understanding correct? 

  / * Representative method for animation * / @ NSObject (CAAnimationDelegate) / * When the animation begins its active period. * / - (zero) animationDidStart: (caanimation *) anime; / * When the animation either completes its active period or * is removed from the object which is connected to it (i.e. layer) The 'flag' * is true if the animation is without reaching the end of its active period without removing *. * / - (zero) Animation: DIDStop: (Animation *) Anime expired: (BOOL) flag;  UIView  according to the documentation    
 = "post-text" itemprop = "text"> 
> Set Animation Destination Selector:  A selector from the message is expected to sign a code like  + (zero) permissions: (NSString *) Animation ID reference: (Zero *) Reference . The selector you provide has an incorrect signature and will not be called. For the NSObject  CAAnimationDelegate  category is not also a document, so you probably have to know what you are doing though your problem is the wrong selector signature.

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