swift - webViewDidStartLoad 和 webViewDidFinishLoad 不工作

Question

我正在尝试检查 WebView 是否正在加载以及是否已完成加载，当我尝试搜索它时，这就是我得到的结果，但是它似乎不起作用是因为我做错了什么或者他们更改代码吗？我确实为 Web View 设置了委托(delegate)，所以我认为问题不在于委托(delegate)。

@IBOutlet weak var webView: UIWebView!
@IBOutlet weak var activity: UIActivityIndicatorView!

override func viewDidLoad() {
    super.viewDidLoad()
    let url = URL(string: "https://stackoverflow.com")

    let urlRequest = URLRequest(url: url!)
    webView.loadRequest(urlRequest)
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func webViewDidStartLoad(_ webView: UIWebView){
    print("Webview started Loading")
}

func webViewDidFinishLoad(_ webView: UIWebView) {
    print("Webview did finish load")
}

Answer 1

您需要使您的类符合 UIWebViewDelegate 并将 webView 的管理委托(delegate)给您的类:

class YourClass: UIViewController, UIWebViewDelegate {
   @IBOutlet weak var webView: UIWebView!
   @IBOutlet weak var activity: UIActivityIndicatorView!

   override func viewDidLoad() {
     super.viewDidLoad()
     let url = URL(string: "https://stackoverflow.com")

     //!!!!!!!
     webView.delegate = self
     //!!!!!!!
     let urlRequest = URLRequest(url: url!)
     webView.loadRequest(urlRequest)
   }

   override func didReceiveMemoryWarning() {
       super.didReceiveMemoryWarning()
       // Dispose of any resources that can be recreated.
   }

   func webViewDidStartLoad(_ webView: UIWebView){
     print("Webview started Loading")
   }

   func webViewDidFinishLoad(_ webView: UIWebView) {
     print("Webview did finish load")
   }
}