 毛玻璃

    //毛玻璃测试1
    UIToolbar *toolbar = [[UIToolbar alloc]         initWithFrame:CGRectMake(, , bgImgView.frame.size.width*., bgImgView.frame.size.height)];
    toolbar.barStyle = UIBarStyleBlackTranslucent;
    [bgImgView addSubview:toolbar];

    //毛玻璃测试2
    let blur = UIBlurEffect(style: UIBlurEffectStyle.Dark)
    let effectiview = UIVisualEffectView(effect: blur)
    effectiview.frame = CGRect(x: 0, y: 0, width: obj.bgImage.frame.size.width, height: obj.bgImage.size.height)
    effectiview.alpha = 0.7
    obj.bgImage.addSubview(effectiview)