如何在成功登录UIWebView后跳转回app

Question

我正在使用带有UIWebView的UIViewController。在此UIWebView中，用户必须登录，成功登录后，应将用户重定向回应用程序。但在我的例子中，它停留在UIWebView中，不会将我重定向回应用程序。

我尝试在API Delegate中使用以下代码：

func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
    DispatchQueue.main.async {
        if (url.scheme == "go-back"){
            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            let controller = storyboard.instantiateViewController(withIdentifier: "WebView") as! ViewController
            self.window?.rootViewController!.present(controller, animated: true, completion: { () -> Void in
            })
        }
    }
    return true
}

并创建了一个URL方案，但它不起作用。

Answer 1

Step1 :

在你的ViewController中使用WKWebView而不是UIWebView。

Step2 :

让你的ViewController成为WKWebView的代表

    webView.navigationDelegate = self
    webView.uiDelegate = self

Step3 :

最后，在ViewController中实现WKNavigationDelegate

    extension ViewController : WKNavigationDelegate{

        func webView(
            _ webView: WKWebView,
            decidePolicyFor navigationAction: WKNavigationAction,
            decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {

            guard let url = navigationAction.request.url else {
                decisionHandler(.allow)
                return
            }

            //now u and ur server team can decide on what url will they redirect and what will be url string on login success
            //lets say u and ur server team decides url to be https://some_base_url/login/success

           if url.absoluteString.contains("/login/success") {
                // this means login successful
                decisionHandler(.cancel)
                _ = self.navigationController?.popViewController(animated: false)
            }
            else {
                decisionHandler(.allow)
            }
        }
}

编辑：

由于OP的代码有问题，我正在更新答案以解决此问题

import UIKit
import WebKit

class ViewController: UIViewController, WKUIDelegate, WKNavigationDelegate{

    var webView: WKWebView!


    override func loadView() {
        let webConfiguration = WKWebViewConfiguration()
        webView = WKWebView(frame: .zero, configuration: webConfiguration)
        webView.uiDelegate = self
        view = webView
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        let myURL = URL(string: "https://")
        let myRequest = URLRequest(url: myURL!)
        webView.load(myRequest)
    }

    func webView(
        _ webView: WKWebView,
        decidePolicyFor navigationAction: WKNavigationAction,
        decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {

        guard let url = navigationAction.request.url else {
            decisionHandler(.allow)
            return
        }


        if url.absoluteString.contains("/login/success") {
            // this means login successful
            decisionHandler(.cancel)
            _ = self.navigationController?.popViewController(animated: false)
        }
        else {
            decisionHandler(.allow)
        }
    }
}

Answer 2

//

导入UIKit导入WebKit

类ViewController: UIViewController，WKUIDelegate，WKNavigationDelegate{

var webView: WKWebView!


override func loadView() {
    let webConfiguration = WKWebViewConfiguration()
    webView = WKWebView(frame: .zero, configuration: webConfiguration)
    webView.uiDelegate = self
    view = webView
}
override func viewDidLoad() {
    super.viewDidLoad()

    let myURL = URL(string: "https://")
    let myRequest = URLRequest(url: myURL!)
    webView.load(myRequest)
}}func webView(
_ webView: WKWebView,
decidePolicyFor navigationAction: WKNavigationAction,
decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {

guard let url = navigationAction.request.url else {
    decisionHandler(.allow)
    return
}


if url.absoluteString.contains("/login/success") {
    // this means login successful
    decisionHandler(.cancel)
    _ = self.navigationController?.popViewController(animated: false)
}
else {
    decisionHandler(.allow)
}

}

我使用下面这行代码得到了错误：

  if url.absoluteString.contains("/login/success") {
    // this means login successful
    decisionHandler(.cancel)
    _ = self.navigationController?.popViewController(animated: false)
}

这说明使用未解析标识符"self“