效果圖片來自網絡

OC代碼實現:

#import"ViewController.h"

@interfaceViewController()

@property(weak,nonatomic)IBOutletUIView*contentView;

@end

@implementationViewController

- (void)viewDidLoad {

[superviewDidLoad];

//復制層:復制里面的子層

CAReplicatorLayer*repL = [CAReplicatorLayerlayer];

repL.frame=_contentView.bounds;

//

instanceCount:表示復制層中有多少份子層,拷貝是instanceCount

- 1份

repL.instanceCount=4;

//設置復制子層偏移量,每個子層都會相對上一次偏移

repL.instanceTransform=CATransform3DMakeTranslation(40,0,0);

//延遲每個子層的動畫,相對于上一個子層延遲

repL.instanceDelay=0.2;

//設置子層的顏色

repL.instanceColor= [UIColorcolorWithWhite:1alpha:0.2].CGColor;

[_contentView.layeraddSublayer:repL];

//紅色的圖層

CALayer*layer = [CALayerlayer];

layer.backgroundColor= [UIColorredColor].CGColor;

//layer.frame = CGRectMake(0, 100, 30, 100);

layer.anchorPoint=CGPointMake(0,1);

layer.position=CGPointMake(0,200);

layer.bounds=CGRectMake(0,0,30,100);

//把紅色圖層添加到復制層中

[repLaddSublayer:layer];

CABasicAnimation*anim = [CABasicAnimationanimation];

anim.keyPath=@"transform.scale.y";

anim.toValue=@0;

anim.duration=0.5;

//設置動畫反轉

anim.autoreverses=YES;

anim.repeatCount=MAXFLOAT;

[layeraddAnimation:animforKey:nil];

}