CoreAnimation学习,学习总结,记录各种过程中遇到的坑

1.

CAAimation  的 duration = 0 的时候, 这个时候就相当于没有动画了.

2.

    CAKeyframeAnimation *rotateAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation.z"];
    rotateAnimation.duration = ;

    CAKeyframeAnimation *positionAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
    positionAnimation.duration = ;

    CAAnimationGroup *animationGroup = [CAAnimationGroup animation];
    animationGroup.animations = @[positionAnimation, rotateAnimation];
    animationGroup.duration = ;

因为用的是CAAnimationGroup, 所以它的duration会覆盖rotationAnimation和positionAnimation

即使是代码这样的顺序(注意对比上面的顺序)也是一样的:

    animationGroup.duration = ;
    animationGroup.animations = @[positionAnimation, rotateAnimation];