Question

我想在上一个动画例程完成后立即启动它。但是，当前一个完成时，由于未调用委托方法，因此不会触发新的触发器。我已委派了一个视图控制器来处理按钮的CALayer的动画。＆＃39; buttonSlide＆＃39;是以前的动画，而按钮淡出＆＃39;是新的。这是代码段： -

-(void)viewWillAppear:(BOOL)animated{

NSLog(@"TimeView appearing...");
[super viewWillAppear:animated];
[self pressButton:nil]; // Shows current time as soon as TimeView appears

//    Silver challenge
CABasicAnimation *buttonSlide= [CABasicAnimation animationWithKeyPath:@"position"];
[buttonSlide setFromValue:[NSValue valueWithCGPoint:CGPointMake(320, 191+15)]];
[buttonSlide setToValue:[NSValue valueWithCGPoint:CGPointMake(160, 191+15)]];
[buttonSlide setDuration:.12];

[button.layer addAnimation:buttonSlide forKey:@"buttonSlide"];

[buttonSlide setDelegate:self];

CABasicAnimation *buttonFade= [CABasicAnimation animationWithKeyPath:@"opacity"];
[buttonFade setFromValue:[NSNumber numberWithFloat:.2]];
[buttonFade setToValue:[NSNumber numberWithFloat:1]];
[buttonFade setDuration:10];


}

-(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{
  NSLog(@"%@ finshed: %d",anim,flag);
  CAAnimation *buttonFade= [button.layer animationForKey:@"opacity"];
  [button.layer addAnimation:buttonFade forKey:@"buttonFade"];

}

委托方法没有登录到控制台，因为它甚至没有被调用。请帮助。

Answer 1

把这个：

[buttonSlide setDelegate:self];

在：

[button.layer addAnimation:buttonSlide forKey:@"buttonSlide"];

因此成为：

[buttonSlide setDelegate:self];
[button.layer addAnimation:buttonSlide forKey:@"buttonSlide"];

会工作。

希望这有帮助。

animationDidStop：finished：委托方法未被调用

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