javascript警报和确认弹出框不能在ios9中与Webkit一起工作

Javascript弹出窗口不适合我与WebKit。

在Safari (OSX)中，此文档将创建预期的警报和确认弹出框。但是我的WebKit实例在IOS模拟器或设备上运行时，弹出窗口不显示，确认函数返回false。

<!DOCTYPE html>
<html>
<body>
    <p id="check3"></p>
    <script>
        alert("alert 1");
        function check3() {
            return(confirm("Confirm?"));
        }
    </script>
    <button type="button"
        onclick="document.getElementById('check3').innerHTML = check3()">
        Check 3</button>
</body>
</html>

我正在使用Xcode 7.3，为IOS 9.3编译。info.plist有"AppTransportSecurity"到"Allow arbitrary HTML"

这是我实例化web视图的代码视图控制器代码:

import UIKit
import WebKit
class ViewController: UIViewController, WKNavigationDelegate {
  @IBOutlet weak var wv: UIView!
  var webView : WKWebView?
  override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(true)
    let webViewCfg = WKWebViewConfiguration()
    webViewCfg.preferences.javaScriptEnabled = true;
    webViewCfg.preferences.javaScriptCanOpenWindowsAutomatically = true
    webView = WKWebView.init(frame:wv.bounds, configuration: webViewCfg)
    self.wv.addSubview(webView!)
    webView!.navigationDelegate = self
    let path = getBundlePath("js1.html")
    let targetFileURL = NSURL(fileURLWithPath: path!, isDirectory: false)
    webView!.loadFileURL(targetFileURL, allowingReadAccessToURL: targetFileURL)
  }
}

从这个答案

你必须使用webview委托:

// MARK: WKUIDelegate methods
func webView(webView: WKWebView, runJavaScriptAlertPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo, completionHandler: (() -> Void)) {
    print("webView:(webView) runJavaScriptAlertPanelWithMessage:(message) initiatedByFrame:(frame) completionHandler:(completionHandler)")
    let alertController = UIAlertController(title: frame.request.URL?.host, message: message, preferredStyle: .Alert)
        alertController.addAction(UIAlertAction(title: "OK", style: .Default, handler: { action in
            completionHandler()
    }))
    self.presentViewController(alertController, animated: true, completion: nil)
}

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