IOS--CALayer实现，界限、透明度、位置、旋转、缩放组合动画

首先引入框架：QuartzCore.framework
在头文件声明：CALayer *logoLayer
{
//界限

CABasicAnimation *boundsAnimation = [CABasicAnimationanimationWithKeyPath:@"bounds"];
boundsAnimation.fromValue = [NSValue valueWithCGRect: logoLayer.bounds];
boundsAnimation.toValue = [NSValue valueWithCGRect:CGRectZero];


//透明度变化
CABasicAnimation *opacityAnimation = [CABasicAnimationanimationWithKeyPath:@"opacity"];
opacityAnimation.fromValue = [NSNumber numberWithFloat:1.0];
opacityAnimation.toValue = [NSNumber numberWithFloat:0.5];
//位置移动

CABasicAnimation *animation  = [CABasicAnimation animationWithKeyPath:@"position"];
animation.fromValue =  [NSValue valueWithCGPoint: logoLayer.position];
CGPoint toPoint = logoLayer.position;
toPoint.x += 180;
animation.toValue = [NSValue valueWithCGPoint:toPoint];
//旋转动画
CABasicAnimation* rotationAnimation =
       [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];//"z"还可以是“x”“y”，表示沿z轴旋转
rotationAnimation.toValue = [NSNumber numberWithFloat:(2 * M_PI) * 3]; 
    // 3 is the number of 360 degree rotations
// Make the rotation animation duration slightly less than the other animations to give it the feel
// that it pauses at its largest scale value
rotationAnimation.duration = 2.0f;
rotationAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; //缓入缓出


//缩放动画

CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
scaleAnimation.fromValue = [NSNumber numberWithFloat:0.0];
scaleAnimation.toValue = [NSNumber numberWithFloat:1.0];
scaleAnimation.duration = 2.0f;
scaleAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

CAAnimationGroup *animationGroup = [CAAnimationGroup animation];
animationGroup.duration = 2.0f;
animationGroup.autoreverses = YES;   //是否重播，原动画的倒播
animationGroup.repeatCount = NSNotFound;//HUGE_VALF;     //HUGE_VALF,源自math.h
[animationGroup setAnimations:[NSArray arrayWithObjects:rotationAnimation, scaleAnimation, nil]];


//将上述两个动画编组
[logoLayer addAnimation:animationGroup forKey:@"animationGroup"];
}
//去掉所有动画
[logoLayer removeAllAnimations];
//去掉key动画

[logoLayer removeAnimationForKey:@"animationGroup"];