WKWebView中如何实现"Are you sure you want to submit the form again"

Question

在 Safari 中，尝试重新加载表单时会显示警告，而 WKWebView 在重新加载时不会显示警告。

如何实现 "Are you sure you want to submit the form again"？

Answer 1

您可以通过创建 UIAlertController 轻松添加警报，然后向其添加自定义操作。

以您的情况为例：

//Create the alert using UIAlertController. Add your custom title and custom message
let alert = UIAlertController(title: "Information", message: "Are you sure you want to submit the form again", preferredStyle: .alert)

//Add custom buttons with different style
alert.addAction(UIAlertAction(title: "Submit", style: .default, handler: nil))
alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))

//Present the alertView
self.presentViewController(alert, animated: true, completion: nil)

你可以把它做成一个函数，然后你可以在刷新页面时调用它。

Answer 2

实施WKNavigationDelegate#webView(_:decidePolicyFor:decisionHandler:)。

然后，如果 navigationAction.navigationType 是 formResubmitted，显示警报。

对于警报的提交或取消按钮操作，分别调用 decisionHandler(.allow) 或 decisionHandler(.cancel)。

func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
    if case .formResubmitted = navigationAction.navigationType {
        // Show alert   
    }
}

WKWebView中如何实现"Are you sure you want to submit the form again"

How to implement "Are you sure you want to submit the form again" in WKWebView

ios

swift

wkwebview