iOS 毛玻璃效果参考

- (void)viewDidLoad {
    [superviewDidLoad];

    

   self.imageView= [[UIImageViewalloc]initWithImage:[UIImageimageNamed:@"4"]];
    self.imageView.frame= self.view.bounds;

   

   /*UIBlurEffectStyleExtraLight, 白色效果

     UIBlurEffectStyleLight,      中
     UIBlurEffectStyleDark         黑色效果*/
    UIBlurEffect *blurEffect = [UIBlurEffecteffectWithStyle:UIBlurEffectStyleExtraLight];
    self.blurView= [[UIVisualEffectViewalloc]initWithEffect:blurEffect];
    self.blurView.frame= self.view.bounds;
   
    //透明度  0透明1不透明
    self.blurView.alpha= 0.3f;
   
    //将毛玻璃效果添加到控件上
    [self.imageViewaddSubview:self.blurView];
   
    //控件添加到视图上

    [self.viewaddSubview:self.imageView];

}