CAReplicatorLayer 重复图层

以前看高级动画的时候，知道CAReplicatorLayer 重复图层，没怎么去用，今天看别人博客看到这个，感觉挺适合做一些动画效果，于是自己尝试一下，做了个简单动画。

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    CAReplicatorLayer *replicatiorLayer = [CAReplicatorLayer layer];
    replicatiorLayer.frame = CGRectMake(100, 64, 350 , 350);
    replicatiorLayer.position = CGPointMake(self.view.bounds.size.width / 2, self.view.bounds.size.height / 2);
    replicatiorLayer.instanceCount= 16;
    replicatiorLayer.instanceTransform = CATransform3DMakeRotation(2 * M_PI / 16, 0, 0, 1);
    replicatiorLayer.instanceBlueOffset = -0.1;
    replicatiorLayer.instanceRedOffset = -0.1;
    replicatiorLayer.instanceDelay = 1.0 / 16; ;
    
    CALayer *layer = [CALayer layer];
    layer.anchorPoint = CGPointMake(0.0, 0.0);
    layer.frame = CGRectMake(80, 150, 30, 30);
    layer.cornerRadius  = 15;
    
    layer.backgroundColor = [UIColor colorWithRed:200/ 255.0 green:200/ 255.0 blue:244/ 255.0 alpha:1].CGColor;
    [replicatiorLayer addSublayer:layer];
    
    [self.view.layer addSublayer:replicatiorLayer];
    CABasicAnimation *baseAnimation = [CABasicAnimation animation];
    baseAnimation.keyPath = @"transform.scale";
    baseAnimation.fromValue = @(1.0);
    baseAnimation.toValue = @(0.1);
    baseAnimation.repeatCount = MAXFLOAT;
    baseAnimation.duration = 1.0;
    [layer addAnimation:baseAnimation forKey:@"baseAnimation"];
    
}

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