WKWebView target =“_ blank”链接在safari ios11，swift 4中打开新选项卡

Question

我知道这个问题已经被问了很多，我想我已经查看过每一篇关于这个问题的帖子，但我仍然无法让它发挥作用。我是swift的新手，我认为这会阻止我从其他答案中调整代码片段。

所以这是我的问题：

我使用WKWebView在我的应用程序中查看网站。当我点击打开新标签的链接时，没有任何反应。我希望在Safari中打开新标签，或者至少在新的wkwebview中打开。我尝试过这样的答案：https://stackoverflow.com/a/27391215和Open a WKWebview target="_blank" link in Safari以及许多其他类似的答案，但我没有取得任何进展。我需要做什么才能在swift 4中完成这项工作？

目前我只是因为我无法实现我成功找到的任何其他解决方案：

func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
    if navigationAction.targetFrame == nil {
        webView.load(navigationAction.request)
    }
    return nil
}

但它似乎没有做任何事情。如果有人可以帮我指出正确的方向，我会非常感激。

Answer 1

我已经粘贴了一些WKWebView项目的示例代码（从文件夹加载本地html），该代码需要在新的浏览器窗口中打开target=_blank的链接。

我已经突出显示了正确打开链接所必须具备的3件事。

1. class ViewController extends WKUIDelegate
2. self.webView.uiDelegate = self
3. 使用UIApplication.shared.open而不是webView.load

让我知道它的工作原理，如果有人可以建议改进下面的示例代码，那将有助于我:)

以下是Xcode 9.2，Swift 4的完整示例代码。

祝好运

import UIKit
import WebKit

class ViewController: UIViewController, WKNavigationDelegate, WKUIDelegate {

    @IBOutlet weak var webView: WKWebView!
    override func viewDidLoad() {
        super.viewDidLoad()
        self.webView.uiDelegate = self

        let htmlPath = Bundle.main.path(forResource: "index", ofType: "html", inDirectory: "www")
        let htmlUrl = URL(fileURLWithPath: htmlPath!)
        let htmlDir = Bundle.main.url(forResource: "www", withExtension: nil)
        webView.loadFileURL(htmlUrl, allowingReadAccessTo: htmlDir!)
    }

    func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
        if navigationAction.targetFrame == nil {
            //webView.load(navigationAction.request)
            UIApplication.shared.open(navigationAction.request.url!, options: [:])
        }
        return nil
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    override var prefersStatusBarHidden: Bool {
        return true
    }

}

Answer 2

细节

• Xcode 10.2（10E125），Swift 5

解

extension ViewController: WKUIDelegate {

    func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
        // push new screen to the navigation controller when need to open url in another "tab"
        if let url = navigationAction.request.url, navigationAction.targetFrame == nil {
            let viewController = ViewController()
            DispatchQueue.main.async { [weak self] in
                self?.navigationController?.pushViewController(viewController, animated: true)
            }
            // .....
            return viewController.webView
        }
        return nil
    }

完整样本

的Info.plist

添加Info.plist传输安全设置

 <key>NSAppTransportSecurity</key>
 <dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
 </dict>

码

import UIKit
import WebKit

class ViewController: UIViewController {

    private lazy var url = URL(string: "https://google.com")!
    private weak var webView: WKWebView?

    func initWebView(configuration: WKWebViewConfiguration) {
        if webView != nil { return }
        let webView = WKWebView(frame: UIScreen.main.bounds, configuration: configuration)
        webView.uiDelegate = self
        view.addSubview(webView)
        self.webView = webView
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        if webView == nil { initWebView(configuration: WKWebViewConfiguration()) }
        webView?.load(url: url)
    }
}

extension ViewController: WKUIDelegate {

    func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
        // push new screen to the navigation controller when need to open url in another "tab"
        if let url = navigationAction.request.url, navigationAction.targetFrame == nil {
            let viewController = ViewController()
            viewController.initWebView(configuration: configuration)
            viewController.url = url
            DispatchQueue.main.async { [weak self] in
                self?.navigationController?.pushViewController(viewController, animated: true)
            }
            return viewController.webView
        }
        return nil
    }
}

extension WKWebView {
    func load(url: URL) { load(URLRequest(url: url)) }
}