1.首先在storyboard上放一个redView。
2.控制器里代码实现。

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIView *redView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    CAReplicatorLayer *repL = [CAReplicatorLayer layer];
    
    repL.frame = _redView.bounds;
    
    [_redView.layer addSublayer:repL];
    
    
    CALayer *layer = [CALayer layer];
    
    layer.transform = CATransform3DMakeScale(0, 0, 0);
    
    layer.position = CGPointMake(_redView.bounds.size.width / 2, 20);
    
    layer.bounds = CGRectMake(0, 0, 10, 10);
    
    layer.backgroundColor = [UIColor greenColor].CGColor;
    
    
    [repL addSublayer:layer];
    
    // 设置缩放动画
    CABasicAnimation *anim = [CABasicAnimation animation];
    
    anim.keyPath = @"transform.scale";
    
    anim.fromValue = @1;
    
    anim.toValue = @0;
    
    anim.repeatCount = MAXFLOAT;
    
    CGFloat duration = 1;
    
    anim.duration = duration;
    
    [layer addAnimation:anim forKey:nil];
    
    
    int count = 20;
    
    CGFloat angle = M_PI * 2 / count;
    
    // 设置子层总数
    repL.instanceCount = count;
    
    repL.instanceTransform = CATransform3DMakeRotation(angle, 0, 0, 1);
    
    repL.instanceDelay = duration / count;
    
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end