Question

我已将webView添加到我的应用中，可通过按一个按钮将其打开。在此webView上方，我添加了一个按钮，该按钮应关闭webView。

如果我按下按钮，WebView应该像它应该那样关闭，但是它只显示黑屏，我想我必须重新加载ViewController。我该怎么办？

        let webConfiguration = WKWebViewConfiguration()
        webView = WKWebView(frame: .zero, configuration: webConfiguration)
        webView.uiDelegate = self
        view = webView

     let button = ButtonDesign(frame: CGRect(x: 320, y: 50, width: 50, height: 50))
        button.setTitle("X", for: .normal)
      button.addTarget(webView, action: #selector(webView.removeFromSuperview), for: UIControl.Event.touchUpInside)
     self.view.addSubview(button)

Answer 1

当前，您将webview设置为vc的视图，但是需要使用addSubview

将其添加为子视图。

let webConfiguration = WKWebViewConfiguration()
// set a non-zero frame 
webView = WKWebView(frame:view.frame, configuration: webConfiguration)
webView.uiDelegate = self
view.addSubview(webView)  // add it here
view.backgroundColor = .red  // change view's color

let button = ButtonDesign(frame: CGRect(x: 320, y: 50, width: 50, height: 50))
button.setTitle("X", for: .normal)
button.addTarget(webView, action: #selector(webView.removeFromSuperview), for: UIControl.Event.touchUpInside)
self.view.addSubview(button)

删除时

webView.removeFromSuperview()

Answer 2

您需要将webview添加为subview。

您实际上是将self.view替换为Web视图。

view = webView <--- ITS' WRONG: viewcontroller's view is replaced by web view

将上面的代码行替换为以下内容...

view.addSubview(webView)

最终代码应类似于...

let webConfiguration = WKWebViewConfiguration()
webView = WKWebView(frame: .zero, configuration: webConfiguration)
webView.uiDelegate = self
view.addSubview(webView)

Answer 3

如果要向后导航，则应关闭或弹出ViewController。

self.dismiss(animated: true, completion: nil)
self.navigationController?.popViewController(animated: true)

如果即时关闭webView，如何重新加载旧视图？

3 个答案: