ios - 在swift中设置模糊效果全屏

Question

我想像gonna app一样在全屏下设置模糊效果

这是我的代码，我想设置模糊效果

 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)

这是我的原始img的img

模糊后效果

我想喜欢下面的

Answer 1

将此代码放在viewImg.image = img下:

viewImg.contentMode = .ScaleAspectFill