CAAnimation相关

在一个delegate函数里面区分不同的caanimation

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

CATransition *animation = [CATransition animation ]; [animation setType :kCATransitionFade]; [animation setSubtype :kCATransitionFromTop]; [animation setDelegate : self ]; [hearingAidHalo setBackgroundImage :[ UIImage imageNamed : @ "m13_grayglow.png" ] forState : UIControlStateNormal ]; [animation setDuration :2 .0 ]; [animation setValue : @ "Throb" forKey : @ "MyAnimationType" ]; [[hearingAidHalo layer ] addAnimation :animation forKey : nil ];   - ( void )animationDidStop:(CAAnimation *)theAnimation finished :( BOOL )flag{        NSString * value = [theAnimation valueForKey : @ "MyAnimationType" ];      if ([value isEqualToString : @ "Throb" ])      {         //... Your code here ...         return ;      }        if ([value isEqualToString : @ "Special1" ])      {         //... Your code here ...         return ;      }        //Add any future keyed animation operations when the animations are stopped. }

 2.CAAnimationGroup 

Important: The delegate and removedOnCompletion properties of animations in the animations array are currently ignored. The CAAnimationGroup delegate does receive these messages.

3.要让一个ca动画终止后，保留末状态，在设置removedOnCompletion = NO后，还得设置fillMode = kCA…..Forward 这个宏名字不太记得了。。。