iOS毛玻璃效果

    UIImageView *backImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"leftBackView"]];
    [self.view addSubview:backImageView];
    //添加毛玻璃效果
    UIBlurEffect *blur = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
    UIVisualEffectView *effectview = [[UIVisualEffectView alloc] initWithEffect:blur];
    effectview.alpha = 0.90f;
    effectview.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
    [backImageView addSubview:effectview];

使用毛玻璃前效果 使用毛玻璃后效果