animationDidStop 方法的多个 CAAnimations?

问题描述

我知道你必须使用这个方法来获取动画结束时的委托方法:

I know you have to use this method to get the delegate method for when the animation has finished:

- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag {

问题是，我如何区分多个 CAAnimations，比如 2 个或更多?

The problem is, how would I distinguish between multiple CAAnimations like 2 or more?

我用谷歌搜索了这个，但没有发现任何有用的东西.

I googled this and I haven't found anything useful.

请与我分享你是如何做到这一点的！

Please share with me on how you accomplished this!

谢谢！

推荐答案

您可以像这样为 CAAnimation 实例设置键/值对象:

You can set key/value objects for CAAnimation instance like this:

CABasicAnimation *theAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
[theAnimation setValue:@"animation1" forKey:@"id"]; 
theAnimation.delegate = self;

CABasicAnimation *theAnimation2 = [CABasicAnimation animationWithKeyPath:@"opacity"];
[theAnimation2 setValue:@"animation2" forKey:@"id"];    
theAnimation2.delegate = self;

检查委托方法中调用了哪一个:

Check which one was called in delegate method:

- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{
    if([[anim valueForKey:@"id"] isEqual:@"animation1"]) {
        NSLog(@"animation1");
    }
    if([[anim valueForKey:@"id"] isEqual:@"animation2"]) {
        NSLog(@"animation2");
    }
}

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