https://github.com/facebook/Shimmer
6000 + star

乍得一看好高大上看不懂，仔细一看还不如乍得一看。
Quartzcore - 还需要继续研究研究。任重道远。

下面抄代码了，唉

拿来用用。

    FBShimmeringView *shimmeringView = [[FBShimmeringView alloc] initWithFrame:self.view.bounds];
    [self.view addSubview:shimmeringView];
    shimmeringView.backgroundColor = [UIColor blackColor];
    
    UILabel *loadingLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 100, CGRectGetWidth(self.view.bounds) - 40, 44)];
    loadingLabel.textAlignment = NSTextAlignmentCenter;
    loadingLabel.text = @"这尼玛效果拔群，脸书出品，必出精品";
    loadingLabel.textColor = [UIColor whiteColor];
    loadingLabel.font = [UIFont systemFontOfSize:16];
    
    
    // 直接赋值,设置的frame就 无效了
    shimmeringView.contentView = loadingLabel;
    
    // 添加子视图，同样有效果
    UIView *vvv = [[UIView alloc] initWithFrame:CGRectMake(100, 200, 100, 100)];
    vvv.backgroundColor = [UIColor whiteColor];
    [shimmeringView.contentView addSubview:vvv];
    
    
    // 闪亮！！！
    shimmeringView.shimmering = YES;