IOS开发 CABasicAnimation

/*

 CAAnimation可分为四种：

 

 1.CABasicAnimation

 通过设定起始点，终点，时间，动画会沿着你这设定点进行移动。可以看做特殊的CAKeyFrameAnimation

 2.CAKeyframeAnimation

 Keyframe顾名思义就是关键点的frame，你可以通过设定CALayer的始点、中间关键点、终点的frame，时间，动画会沿你设定的轨迹进行移动

 3.CAAnimationGroup

 Group也就是组合的意思，就是把对这个Layer的所有动画都组合起来。PS：一个layer设定了很多动画，他们都会同时执行，如何按顺序执行我到时候再讲。

 4.CATransition

 这个就是苹果帮开发者封装好的一些动画

 */

/*

 演员--->CALayer，规定电影的主角是谁

 剧本--->CAAnimation，规定电影该怎么演，怎么走，怎么变换

 开拍--->AddAnimation，开始执行

 */

//layer可以有两种用途，二者不互相冲突：一是对view相关属性的设置，包括圆角、阴影、边框等参数；二是实现对view的动画操控。因此对一个view进行core animation动画，本质上是对该view的.layer进行动画操纵。

//缩放动画

-(void)createScale{

    

    //演员初始化

    UIView *scaleView = [[UIView alloc] initWithFrame:CGRectMake(50, 60, 80, 40)];

//    scaleView.alpha = 0.6;

    scaleView.backgroundColor = [UIColor redColor];

    [self.view addSubview:scaleView];

    

    CALayer *scaleLayer = [[CALayer alloc] init];

    scaleLayer.frame = CGRectMake(-40, 0, 40, 40);

    scaleLayer.cornerRadius = 20;

    scaleLayer.backgroundColor = [UIColor colorWithWhite:0.2 alpha:0.6].CGColor;

    [scaleView.layer addSublayer:scaleLayer];

    

    //设定剧本

    CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];

    //从几倍开始

    scaleAnimation.fromValue = [NSNumber numberWithFloat:0];

    //结束的时候是几倍大小

    scaleAnimation.toValue = [NSNumber numberWithFloat:1];

    //动画回放

    scaleAnimation.autoreverses = YES;

    scaleAnimation.fillMode = kCAFillModeForwards;

    //动画次数

    scaleAnimation.repeatCount = MAXFLOAT;

    //执行一次动画的时间

    scaleAnimation.duration = 1;

    

    //开演

    [scaleLayer addAnimation:scaleAnimation forKey:nil];

}

//例子

- (void)initGroupLayer

{

    //演员初始化

    CALayer *scaleLayer = [[CALayer alloc] init];

    scaleLayer.frame = CGRectMake(40, 180, 80, 80);

    scaleLayer.cornerRadius = 5;

    scaleLayer.backgroundColor = [UIColor colorWithWhite:0.2 alpha:0.6].CGColor;

    [self.view.layer addSublayer:scaleLayer];

    

    //设定剧本

    CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];

    scaleAnimation.fromValue = [NSNumber numberWithFloat:0.5];

    scaleAnimation.toValue = [NSNumber numberWithFloat:1];

    scaleAnimation.autoreverses = YES;

    scaleAnimation.fillMode = kCAFillModeForwards;

    scaleAnimation.repeatCount = MAXFLOAT;

    scaleAnimation.duration = 1;

  

    CABasicAnimation *moveAnimation = [CABasicAnimation animationWithKeyPath:@"position"];

    moveAnimation.fromValue = [NSValue valueWithCGPoint:scaleLayer.position];

    moveAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(320 - 80,

                                                                  scaleLayer.position.y)];

    moveAnimation.autoreverses = YES;

    moveAnimation.fillMode = kCAFillModeForwards;

    moveAnimation.repeatCount = MAXFLOAT;

    moveAnimation.duration = 2;

    

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

    scaleAnimation.fromValue = [NSNumber numberWithFloat:1];

    rotateAnimation.toValue = [NSNumber numberWithFloat:6.0 * M_PI];

    scaleAnimation.autoreverses = YES;

    scaleAnimation.fillMode = kCAFillModeForwards;

    scaleAnimation.repeatCount = MAXFLOAT;

    scaleAnimation.duration = 2;

    

    CAAnimationGroup *groupAnnimation = [CAAnimationGroup animation];

    groupAnnimation.duration = 2;

    groupAnnimation.autoreverses = YES;

    groupAnnimation.animations = @[moveAnimation, scaleAnimation, rotateAnimation];

    groupAnnimation.repeatCount = MAXFLOAT;

    

    

    

    [scaleLayer addAnimation:groupAnnimation forKey:@"groupAnnimation"];

}