在 Safari 中打开 WKWebview target="_blank" 链接

Question

我正在尝试让我的混合 IOS 应用程序使用 Swift 和 WKWebviews 打开具有 target="_blank" 的链接，或者如果 URL 包含 http://、https:// 或 mailto: 在 Mobile Safari 中。

来自this answer 我得到了这个代码。

func webView(webView: WKWebView!, createWebViewWithConfiguration     configuration: WKWebViewConfiguration!, forNavigationAction navigationAction:     WKNavigationAction!, windowFeatures: WKWindowFeatures!) -> WKWebView! {
    if navigationAction.targetFrame == nil {
        webView.loadRequest(navigationAction.request)
    }
    return nil
}

首先，这对我没有任何作用。其次，我希望它在新窗口中打开。我发现这段代码应该做这样的事情......

if let requestUrl = NSURL(string: "http://www.iSecurityPlus.com") {
     UIApplication.sharedApplication().openURL(requestUrl)
}

如何将这两者结合起来并让它们发挥作用？我需要在 ViewController 声明中添加什么才能使其工作？

Answer 1

斯威夫特 4.2

func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Swift.Void) {
    if navigationAction.navigationType == WKNavigationType.linkActivated {
        print("here link Activated!!!")
        if let url = navigationAction.request.url {
            let shared = UIApplication.shared
            if shared.canOpenURL(url) {
                shared.open(url, options: [:], completionHandler: nil)
            }
        }
        decisionHandler(.cancel)
    }
    else {
        decisionHandler(.allow)
    }
}

Answer 2

为 iOS 10 Swift 3 更新代码：

override func loadView() {
    super.loadView()
    self.webView.navigationDelegate = self 
    self.webView.uiDelegate = self  //must have this
}

func webView(_ webView: WKWebView,
               createWebViewWith configuration: WKWebViewConfiguration,
               for navigationAction: WKNavigationAction,
               windowFeatures: WKWindowFeatures) -> WKWebView? {
    if navigationAction.targetFrame == nil, let url = navigationAction.request.url {
      if url.description.lowercased().range(of: "http://") != nil ||
        url.description.lowercased().range(of: "https://") != nil ||
        url.description.lowercased().range(of: "mailto:") != nil {
        UIApplication.shared.openURL(url)
      }
    }
  return nil
}

Answer 3

func webView(_ webView: WKWebView,
           createWebViewWith configuration: WKWebViewConfiguration,
           for navigationAction: WKNavigationAction,
           windowFeatures: WKWindowFeatures) -> WKWebView? {
  if navigationAction.targetFrame == nil, let url = navigationAction.request.url, let scheme = url.scheme {
    if ["http", "https", "mailto"].contains(where: { $0.caseInsensitiveCompare(scheme) == .orderedSame }) {
      UIApplication.shared.openURL(url)
    }
  }
  return nil
}

Answer 4

先添加WKNavigationDelegate和webviewWk.navigationDelegate = self

func webView(webView: WKWebView, decidePolicyForNavigationAction navigationAction: WKNavigationAction, decisionHandler: (WKNavigationActionPolicy) -> Void) {

        //this is a 'new window action' (aka target="_blank") > open this URL externally. If we´re doing nothing here, WKWebView will also just do nothing. Maybe this will change in a later stage of the iOS 8 Beta
        if navigationAction.navigationType == WKNavigationType.LinkActivated {
            println("here link Activated!!!")
            let url = navigationAction.request.URL
            let shared = UIApplication.sharedApplication()

            let urlString = url!.absoluteString

            if shared.canOpenURL(url!) {
                shared.openURL(url!)
            }

            decisionHandler(WKNavigationActionPolicy.Cancel)
        }

        decisionHandler(WKNavigationActionPolicy.Allow)
    }

Answer 5

在 (from here)

 override func loadView() {
    super.loadView()
    self.webView.navigationDelegate = self 
    self.webView.UIDelegate = self  //must have this
 }

然后添加函数（from here, with additions）...

func webView(webView: WKWebView,
    createWebViewWithConfiguration configuration: WKWebViewConfiguration,
    forNavigationAction navigationAction: WKNavigationAction,
    windowFeatures: WKWindowFeatures) -> WKWebView? {
        if navigationAction.targetFrame == nil {
            var url = navigationAction.request.URL
            if url.description.lowercaseString.rangeOfString("http://") != nil || url.description.lowercaseString.rangeOfString("https://") != nil || url.description.lowercaseString.rangeOfString("mailto:") != nil  {
                UIApplication.sharedApplication().openURL(url)
            }
        }
        return nil
}