Question

我一直在研究一个简单的应用程序，该应用程序可以对网站进行网页浏览，学生可以在其中进行考试。

所以基本上，我的问题是学生完成后，必须单击将发送答案的按钮。将出现一个弹出窗口，使他们确认。 https://i.stack.imgur.com/5GhB8.png 除了它没有显示。按下按钮时没有任何反应。它可以在Safari上完美运行，我注意到它可以在已弃用的Webview（UIWebview）上运行，但是我一直在尝试使其在WKWebView上运行。

我绝对不是敏捷专家，因此，如果答案很简单，我深表歉意。我一直在寻找有关我的问题的答案，但是我不确定如何实现。

在此先感谢您的帮助，

import UIKit
import WebKit

class webViewController: UIViewController {

    @IBOutlet weak var webview: WKWebView!

    override func viewDidLoad() {

        super.viewDidLoad()

        let lien = "***"
        if let url = URL(string: lien) {
            let request = URLRequest(url: url)
            _ = webview.load(request);
        }
    }


    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}

Answer 1

我尝试了另一种方法，它对我有用。这是代码：创建一个WebView实例

fileprivate var webView: WKWebView?

初始化实例并将其分配给视图。

override func loadView() {
    webView = WKWebView(frame: .zero, configuration: WKWebViewConfiguration())
    webView?.uiDelegate = self
    webView?.navigationDelegate = self
    view = webView
}

此后，只需添加以下委托方法：

func webView(_: WKWebView, createWebViewWith _: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures _: WKWindowFeatures) -> WKWebView? {
    self.webView?.load(navigationAction.request)
    return nil
}

Voila！一切都将与UIWebView相同。

注意：您将无法在WebSite上点击几个链接，因为它们将是HTTP而不是HTTPS。默认情况下，WKWebView会阻止所有不安全的HTTP请求。

要绕过，只需将NSExceptionAllowsInsecureHTTPLoads添加为true文件中的info.plist。

Answer 2

我也面临类似的问题，我的连接Facebook的弹出窗口不会在WKWebView中显示，但在野生动物园浏览器上可以正常工作。

此代码导致了此问题。

- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures {
//This condition was causing the problem while trying to get popup
    if (!navigationAction.targetFrame.isMainFrame) {
        [webView loadRequest:navigationAction.request];
    }
    return nil;
}

我将其更改为以下代码，并且有效

- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures {
    if (navigationAction.targetFrame == nil) {
        NSURL *tempURL = navigationAction.request.URL;
        NSURLComponents *URLComponents = [[NSURLComponents alloc] init];
        URLComponents.scheme = [tempURL scheme];
        URLComponents.host = [tempURL host];
        URLComponents.path = [tempURL path];
        if ([URLComponents.URL.absoluteString isEqualToString:@"https://example.com/Account/ExternalLogin"]) {
            WKWebView *webViewtemp = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:configuration];
            webViewtemp.UIDelegate = self;
            webViewtemp.navigationDelegate = self;
            [self.view addSubview:webViewtemp];
            return webViewtemp;
        } else {
            [webView loadRequest:navigationAction.request];
        }
    }
    return nil;
}

快速版本：

func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
    if navigationAction.targetFrame == nil {
        let tempURL = navigationAction.request.url
        var components = URLComponents()
        components.scheme = tempURL?.scheme
        components.host = tempURL?.host
        components.path = (tempURL?.path)!
        if components.url?.absoluteString == "https://example.com/Account/ExternalLogin" {
            let webViewtemp = WKWebView(frame: self.view.bounds, configuration: configuration)
            webViewtemp.uiDelegate = self
            webViewtemp.navigationDelegate = self
            self.view.addSubview(webViewtemp)
            return webViewtemp
        } else {
            webView.load(navigationAction.request)
        }
    }
    return nil
}

希望这对您有帮助

Answer 3

我的解决方案是实现WKUIDelegate并添加针对Web视图可能呈现的不同场景（警报）的功能：

extension WKWebViewController: WKUIDelegate {

    func webView(_ webView: WKWebView, runJavaScriptAlertPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo, completionHandler: @escaping () -> Void) {
        let alertController = UIAlertController(title: nil, message: message, preferredStyle: .actionSheet)

        alertController.addAction(UIAlertAction(title: NSLocalizedString("OK", comment: "OK button"), style: .default, handler: { (action) in
            completionHandler()
        }))

        present(alertController, animated: true, completion: nil)
    }

    func webView(_ webView: WKWebView, runJavaScriptConfirmPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo, completionHandler: @escaping (Bool) -> Void) {
        let alertController = UIAlertController(title: nil, message: message, preferredStyle: .actionSheet)

        alertController.addAction(UIAlertAction(title: NSLocalizedString("OK", comment: "OK button"), style: .default, handler: { (action) in
            completionHandler(true)
        }))

        alertController.addAction(UIAlertAction(title: NSLocalizedString("Cancel", comment: "Cancel button"), style: .default, handler: { (action) in
            completionHandler(false)
        }))

        present(alertController, animated: true, completion: nil)
    }

    func webView(_ webView: WKWebView, runJavaScriptTextInputPanelWithPrompt prompt: String, defaultText: String?, initiatedByFrame frame: WKFrameInfo, completionHandler: @escaping (String?) -> Void) {
        let alertController = UIAlertController(title: nil, message: prompt, preferredStyle: .actionSheet)

        alertController.addTextField { (textField) in
            textField.text = defaultText
        }

        alertController.addAction(UIAlertAction(title: NSLocalizedString("OK", comment: "OK button"), style: .default, handler: { (action) in
            if let text = alertController.textFields?.first?.text {
                completionHandler(text)
            } else {
                completionHandler(defaultText)
            }
        }))

        alertController.addAction(UIAlertAction(title: NSLocalizedString("Cancel", comment: "Cancel button"), style: .default, handler: { (action) in
            completionHandler(nil)
        }))

        present(alertController, animated: true, completion: nil)
    }

}

Answer 4

当 Web 视图需要新的弹出窗口时，WKWebView 的 UIDelegate 就会出现。

按照以下步骤在 WKWebView 中显示 POP-Up 视图

进行另一个网络视图
```
private var popupWebView: WKWebView?
```
将主 web 视图的 uiDelegate 分配给 self
```
webView?.uiDelegate = self
```

确认控制器的 WKUIDelegate

extension PaisaPalVC: WKUIDelegate {
    func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
        popupWebView = WKWebView(frame: view.bounds, configuration: configuration)
        popupWebView?.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        popupWebView?.navigationDelegate = self
        popupWebView?.uiDelegate = self
        if let newWebview = popupWebView {
            view.addSubview(newWebview)
        }
        return popupWebView ?? nil
    }
    func webViewDidClose(_ webView: WKWebView) {
        webView.removeFromSuperview()
        popupWebView = nil
    }
}

希望对你有帮助?

WKWebView弹出窗口不显示

4 个答案: