CAReplicatorLayer 复制层(音乐播放条案例)

1.把绘制一个复制层CAReplicatorLayer.frame和view的bounds一样大
2.把复制层添加到view的layer层上
3.在复制层添加一个layer,并对layer添加动画
4.对复制层的一些属性进行设置
效果图

效果图.gif

- (void)viewDidLoad {
    [super viewDidLoad];
    UIView *bgView = [[UIView alloc]initWithFrame:CGRectMake(80, 100, 300, 200)];
    bgView.backgroundColor= [UIColor redColor];
    [self.view addSubview:bgView];
    // 赋值层
    CAReplicatorLayer *repL = [CAReplicatorLayer layer];
    repL.frame = bgView.bounds;
    [bgView.layer addSublayer:repL];
    // 赋值5次
    repL.instanceCount = 5; 
    // 沿X轴平移45距离
    repL.instanceTransform = CATransform3DMakeTranslation(45, 0, 0);
    // 设置复制出来的动画延时时长
    repL.instanceDelay = 1;
    
    //创建一个震动条
    CALayer *layer = [CALayer layer];
    layer.backgroundColor = [UIColor blueColor].CGColor;
    layer.bounds = CGRectMake(0, 0, 30, 100);
    layer.anchorPoint = CGPointMake(0, 1); // 修改锚点
    layer.position = CGPointMake(0, bgView.bounds.size.height);
    [repL addSublayer:layer];
    
    //添加动画
    CABasicAnimation *animation = [CABasicAnimation animation];
    animation.keyPath = @"transform.scale.y";
    animation.toValue = @0;
    animation.repeatCount = MAXFLOAT;
    animation.duration = 1;
    animation.autoreverses = true;
    [layer addAnimation:animation forKey:nil];
}

图片倒影案例

效果图

- (void)viewDidLoad {
    [super viewDidLoad];
    CAReplicatorLayer *repL = (CAReplicatorLayer *)self.view.layer;
    repL.instanceCount = 2;
    repL.position = CGPointMake(self.view.bounds.size.width * 0.5, self.view.bounds.size.height * 0.5);
    // 绕着复制层的锚点旋转
    repL.instanceTransform = CATransform3DMakeRotation(M_PI, 1, 0, 0);
    // 阴影
    repL.instanceRedOffset -= 0.2;
    repL.instanceGreenOffset -= 0.2;
    repL.instanceBlueOffset -= 0.2;
    repL.instanceAlphaOffset -= 0.1;
}

图片倒影案例源码