iOS CALayer 抖动效果

方式一

- (void)shakeAnimationForView:(UIView *)view
{
    CALayer *layer = [view layer];
    CAKeyframeAnimation *animation = [CAKeyframeAnimation animation];
    animation.keyPath = @"position.x";
    animation.values = @[ @0, @5, @10, @-10, @10, @5, @0 ];
    animation.keyTimes = @[ @0, @(1 / 6.0),@(2 / 6.0), @(3 / 6.0), @(5 / 6.0),@(2 / 6.0), @1 ];
    animation.duration = 0.4;
    
    animation.additive = YES;
    
    [layer addAnimation:animation forKey:@"shake"];
}

方式二

- (void)shakeAnimationForView:(UIView *) view

{   
    //获取到当前View的layer
    CALayer *viewLayer = view.layer;
    
    //获取当前View的位置
    CGPoint position = viewLayer.position;

    //移动的两个终点位置
    CGFloat scale = 5.0f;
    CGPoint beginPosition = CGPointMake(position.x + scale, position.y);
    CGPoint endPosition = CGPointMake(position.x - scale, position.y);
    
    //设置动画
    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"position"];
    
    //设置运动形式
    [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionDefault]];
    
    //设置开始位置
    [animation setFromValue:[NSValue valueWithCGPoint:beginPosition]];
    
    //设置结束位置
    [animation setToValue:[NSValue valueWithCGPoint:endPosition]];
    
    //设置自动反转
    [animation setAutoreverses:YES];
    
    //设置时间
    [animation setDuration:0.1];
    
    //设置次数
    [animation setRepeatCount:3];
    
    //添加上动画
    [viewLayer addAnimation:animation forKey:nil];
    
}