如何删除动画(CABasicAnimation)？

Question

我想在完成之前删除动画(CABasicAnimation).

例如:

在我的代码中,我从一个旋转值0到目标值5开始设置动画针.当针达到旋转值3时,如何停止动画？

CALayer* layer = someView.layer;
CABasicAnimation* animation;
animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
animation.fromValue = [NSNumber numberWithFloat:0];
animation.toValue = [NSNumber numberWithFloat:5];
animation.duration = 1.0;
animation.cumulative = YES;
animation.repeatCount = 1;
animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;
[layer addAnimation:rotationAnimation forKey:@"transform.rotation.z"];

Answer 1

[layer removeAnimationForKey:@"transform.rotation.z"];

layer.removeAnimation(forKey: "bounce")

还有

layer.removeAllAnimations()

Answer 2

改变：

animation.toValue = [NSNumber numberWithFloat:5];

到

animation.toValue = [NSNumber numberWithFloat:3];