IOS图片设置毛玻璃效果

UIBlurEffect *blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];

UIVisualEffectView *effectView = [[UIVisualEffectView alloc] initWithEffect:blurEffect];

effectView.frame = self.SecuritySettingImgV.bounds;
[self.SecuritySettingImgV addSubview:effectView];

effectView.alpha = .2f;