在swift中设置模糊效果全屏

Question

我想在全屏幕中设置模糊效果，就像应用

一样

这是我想要设置模糊效果的代码

 let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
 filePathToWrite1 = "\(paths)/\(videoTitle[a]).jpg"
 let img = UIImage(contentsOfFile: filePathToWrite1)
 viewImg.image = img

 let blurEffect = UIBlurEffect(style: UIBlurEffectStyle.Dark)
        blurEffectView = UIVisualEffectView(effect: blurEffect)
        blurEffectView.frame = viewImg.bounds
        blurEffectView.autoresizingMask = [.FlexibleWidth, .FlexibleHeight]

         viewImg.addSubview(blurEffectView)
         view.addSubview(viewImg)

这是img for my Original img

模糊效果

我想在下面

Answer 1

将此代码放在viewImg.image = img：

下

viewImg.contentMode = .ScaleAspectFill