UIVisualEffectView不设置为零

我有我试图在viewDidLoad中UIVisualEffectView不设置为零

我在做什么错误设置为零一个UIVisualEffectView？

@IBOutlet var popUpView: UIView! 

@IBOutlet weak var visualEffectView: UIVisualEffectView! 

var effect: UIVisualEffect! 

@IBOutlet weak var headerLabel: UILabel! 

override func viewDidLoad() { 
    super.viewDidLoad() 

    effect = visualEffectView.effect 
    self.visualEffectView.effect = nil 
    popUpView.layer.cornerRadius = 5 

}

来源

2017-09-09 Cameron

打印（self.visualEffectView.effect），看看它是否是零 – 3stud1ant3

@ 3stud1ant3当我把它打印出来它是不是零 – Cameron

我尝试这样做，它给了我无，我已经尝试了这个代码：@IBOutlet weak var myVisualEffectView：UIVisualEffectView！变化效果：UIVisualEffect！倍率FUNC viewDidLoad中（）{ super.viewDidLoad（）效果= myVisualEffectView.effect 打印（效果） self.myVisualEffectView.effect =零打印（self.myVisualEffectView.effect） }，第一打印（效果）打印UIBlur效果实例和第二次打印输出nil – 3stud1ant3

See my answer 


    var blurEffect = UIBlurEffect() 
    var blurview : UIView = UIView() 

    //HERE pass view as bringtofront from blurview and pass view where you want to set blurview upon 
     func add_blur_view(v : UIView, view_bring_to_front: UIView) { 
      blurEffect = UIBlurEffect(style: UIBlurEffectStyle.dark) 
      let blurEffectView = UIVisualEffectView(effect: blurEffect) 
      blurEffectView.frame = v.bounds 
      blurEffectView.autoresizingMask = [.flexibleWidth, .flexibleHeight] 
      v.addSubview(blurEffectView) 
      v.bringSubview(toFront: view_bring_to_front) 
     } 

     func remove_blur_view(v : UIView) { 
      for subview in v.subviews { 
       if subview is UIVisualEffectView { 
        subview.removeFromSuperview() 
       } 
      } 
     }

来源

2017-09-09 05:14:14

UIVisualEffectView不设置为零

回答

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