WKWebView 加载后 6 秒显示警报

Question

我有这个但不确定如何设置一个 6 秒的计时器，例如在 WKWebView 加载之后。我有这个代表didFinish navigation。我认为这行不通：

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
    showAlert()
}

func showAlert() {
    let alert = UIAlertController(title: "Loaded ", message: "In webview currently", preferredStyle: UIAlertController.Style.alert)
    self.present(alert, animated: true, completion: nil)
}

Answer 1

您可以为此使用DispatchQueue asyncAfter。它在分配给它的最后期限之后执行操作。以下是您的解决方案。

func showAlert() {
    let alert = UIAlertController(title: "Loaded ", message: "In webview currently", preferredStyle: .alert)
    DispatchQueue.main.asyncAfter(deadline: .now()+6.0) {
        self.present(alert, animated: true, completion: nil)
    }
}

Answer 2

你可以这样做：

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
     Timer.scheduledTimer(timeInterval: 6, target: self, selector: #selector(showAlert), userInfo: nil, repeats: false)
}

@objc func showAlert() {
    let alert = UIAlertController(title: "Loaded ", message: "In webview currently", preferredStyle: UIAlertController.Style.alert)
    self.present(alert, animated: true, completion: nil)
}