ios - 快速向背景添加模糊效果

Question

我正在设置背景图像以查看 Controller 。但我也想为这个背景添加模糊效果。我该怎么做？

我正在使用以下代码设置背景:

self.view.backgroundColor = UIColor(patternImage: UIImage(named: "testBg")!)

我在互联网上找到了 blur imageview 如何将其应用到我的背景中？

var darkBlur = UIBlurEffect(style: UIBlurEffectStyle.Dark)
// 2
var blurView = UIVisualEffectView(effect: darkBlur)
blurView.frame = imageView.bounds
// 3
imageView.addSubview(blurView)

Answer 1

我已经测试了这段代码，它工作正常:

let blurEffect = UIBlurEffect(style: UIBlurEffect.Style.dark)
let blurEffectView = UIVisualEffectView(effect: blurEffect)
blurEffectView.frame = view.bounds
blurEffectView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
view.addSubview(blurEffectView)

对于 Swift 3.0:

let blurEffect = UIBlurEffect(style: UIBlurEffectStyle.dark)
let blurEffectView = UIVisualEffectView(effect: blurEffect)
blurEffectView.frame = view.bounds
blurEffectView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
view.addSubview(blurEffectView)

对于 Swift 4.0:

let blurEffect = UIBlurEffect(style: UIBlurEffect.Style.dark)
let blurEffectView = UIVisualEffectView(effect: blurEffect)
blurEffectView.frame = view.bounds
blurEffectView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
view.addSubview(blurEffectView)

在这里你可以看到结果:

或者您可以为此使用此库:

https://github.com/FlexMonkey/Blurable