iOS 毛玻璃效果

    UIImageView * image=[[UIImageView alloc]init];

    image.frame=CGRectMake(0, 0, 320, 568);

    image.image=[UIImage imageNamed:@"Guide_img_1"];

    [self.view addSubview:image];

    

    UIBlurEffect * blur = [UIBlurEffect effectWithStyle:UIBlurEffectStyleExtraLight];

    UIVisualEffectView * effe = [[UIVisualEffectView alloc]initWithEffect:blur];

    effe.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);

    // 把要添加的视图加到毛玻璃上

    [self.view addSubview:effe];