如何在swift中从webView获取URL

Question

我有疑问,我该如何从中获取网址webView？我执行以下代码,然后得到了nil

代码我正在尝试:

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(true)
    webView.loadRequest(URLRequest(url: URL(string: "https://www.youtube.com/watch?v=Vv2zJErQt84")!))
    if let text = webView.request?.url?.absoluteString{
         print(text)
    }
}

Answer 1

你没有得到url因为webView没有完成所请求的加载URL,你可以URL在webViewDidFinishLoad方法中得到它UIWebviewDelegate.为此,您需要设置webView当前的委托ViewController并需要实现UIWebviewDelegate.

webView.delegate = self

现在您可以获取当前加载URL的webViewin webViewDidFinishLoad方法.

func webViewDidFinishLoad(_ webView: UIWebView) {
    if let text = webView.request?.url?.absoluteString{
         print(text)
    }
}

Answer 2

对于swift 5和swift 4.2使用let url = webView.url?.absoluteString：-

首先导入 WebKit :-

import WebKit

然后添加协议：-

class ViewController: UIViewController, WKNavigationDelegate

然后添加委托：-

    //MARK:- WKNavigationDelegate

func webView(_ webView: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: Error) {
    print(error.localizedDescription)
}
func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
    print("Strat to load")
    
    if let url = webView.url?.absoluteString{
        print("url = \(url)")
    }
}
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
    print("finish to load")
   
    if let url = webView.url?.absoluteString{
        print("url = \(url)")
    }
}