【学习】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 =[CABasicAnimation animationWithKeyPath:@"bounds"];

boundsAnimation.fromValue =[NSValue valueWithCGRect: logoLayer.bounds];

boundsAnimation.toValue =[NSValue valueWithCGRect:CGRectZero];

//透明度变化

CABasicAnimation *opacityAnimation =[CABasicAnimation animationWithKeyPath:@"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 otheranimations 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"];