Check if UIWebView is done loading in Swift

Question

I am making an application that loads a UIWeb View and runs a line of code the moment the webpage is completely loaded.

I am using code like this to load the webpage:

    let links = URL (string: "https://example.com")
    let loadpage = URLRequest(url: links!)
    webPage.loadRequest(load)

How can I run a piece of code the moment the webpage is done? I have tried some examples online but the webpage stops loading while checking if it has loaded?

Thanks!

Answer 1

As stated in the documentation of UIWebView, for apps targeting iOS8 or later you should be using WKWebView instead.

When using a WKWebView, you can make your class conform to WKNavigationDelegate and the delegate method func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) will be called once the webview finishes loading a network request.

If for some reason you are still targeting iOS7 or any previous iOS versions and hence the use of a UIWebView, you can use UIWebViewDelegate's func webViewDidFinishLoad(_ webView: UIWebView) method instead.

Skeleton code for the UIWebView solution:

class WebVC: UIViewController {
    @IBOutlet weak var webView: UIWebView!

    override func viewDidLoad() {
        webView.delegate = self
        let url = URL(string: "https://example.com")
        let request = URLRequest(url: url)
        webView.loadRequest(request)
    }
}

extension WebVC: UIWebViewDelegate {
    func webViewDidFinishLoad(_ webView: UIWebView) {
        print("Finished loading")
    }
}