```
// 毛玻璃效果
UIBlurEffect*effect = [UIBlurEffecteffectWithStyle:UIBlurEffectStyleLight];
UIVisualEffectView*aView = [[UIVisualEffectViewalloc]initWithEffect:effect];
aView.frame=self.view.bounds;
aView.alpha=0;
[self.viewaddSubview:aView];
```
```
// 毛玻璃效果
UIBlurEffect*effect = [UIBlurEffecteffectWithStyle:UIBlurEffectStyleLight];
UIVisualEffectView*aView = [[UIVisualEffectViewalloc]initWithEffect:effect];
aView.frame=self.view.bounds;
aView.alpha=0;
[self.viewaddSubview:aView];
```