CAReplicatorLayer的使用示例

音量振动条

CAReplicatorLayer *repL = [CAReplicatorLayer layer]; [_lightView.layer addSublayer:repL]; CALayer *layer = [CALayer layer]; layer.anchorPoint = CGPointMake(0.5, 1); layer.position = CGPointMake(15, _lightView.frame.size.height); layer.bounds = CGRectMake(0, 0, 30, 150); layer.backgroundColor = [UIColor whiteColor].CGColor; [repL addSublayer:layer]; CABasicAnimation *anim = [CABasicAnimation animation]; anim.keyPath = @"transform.scale.y"; anim.toValue = @0.1; anim.duration = 0.5; anim.repeatCount = MAXFLOAT; //设置动画反转 anim.autoreverses = YES; [layer addAnimation:anim forKey:nil]; //instanceCount，表示复制层里有多少个子层，包括原始层 repL.instanceCount = 5; //设置复制子层偏移量，不包括原始层,相对于原始层x偏移 repL.instanceTransform = CATransform3DMakeTranslation(45, 0, 0); //设置复制层动画延迟时间 repL.instanceDelay = 0.1; repL.instanceColor = [UIColor greenColor].CGColor; repL.instanceGreenOffset = -0.2;

活动指示器

CAReplicatorLayer *repL = [CAReplicatorLayer layer]; repL.frame = _lightView.bounds; [_lightView.layer addSublayer:repL]; CALayer *layer = [CALayer layer]; layer.transform = CATransform3DMakeScale(0, 0, 0); layer.position = CGPointMake(_lightView.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;