UIVisualEffectView LoadVIew（）

我试图将visualEffect添加到在iOS10和以前版本上正常工作的视图中......但在iOS 11上它崩溃了。UIVisualEffectView LoadVIew（）

has been added as a subview to <UIVisualEffectView: 0x7feabe90d170; frame = (0 0; 375 812); layer = <CALayer: 0x6000006257c0>>. Do not add subviews directly to the visual effect view itself, instead add them to the -contentView."

我用下面的代码：错误原因如下

override func loadView() { 
    super.loadView() 

    // create the blur view 
    let blurView = UIVisualEffectView(effect: effect) 
    if let oldView = view { 
     blurView.frame = view.frame 
     oldView.translatesAutoresizingMaskIntoConstraints = false 
     blurView.contentView.addSubview(oldView) 
     blurView.contentView.pinParentAllDirections(oldView) 
    } 
    view = blurView 
}

奇怪的是，当我在viewDidLoad中添加此代码它传递崩溃...任何人，请帮助我了解主要问题或者我错过iOS11的任何内容。

来源

2017-09-26 Mohamed Emad Hegab