ios - Hybrid Webview IOS停止缩放

Question

我正在使用 Xamarin Forms 构建一个应用程序，在此我实现了一个混合 webview。在 IOS 中，混合 Web View 具有缩放功能，我需要将其禁用。

这是我到目前为止尝试过的:-

  public class ActivityHybridWebViewRenderer : ViewRenderer<ActivityHybridWebView, WKWebView>, IWKScriptMessageHandler
    {
        const string JavaScriptFunction = "function invokeCSharpAction(data){window.webkit.messageHandlers.invokeAction.postMessage(data);}";
        WKUserContentController userController;

        protected override void OnElementChanged(ElementChangedEventArgs<ActivityHybridWebView> e)
        {
            base.OnElementChanged(e);

            if (Control == null)
            {
                userController = new WKUserContentController();
                var script = new WKUserScript(new NSString(JavaScriptFunction), WKUserScriptInjectionTime.AtDocumentEnd, false);
                userController.AddUserScript(script);
                userController.AddScriptMessageHandler(this, "invokeAction");
                var config = new WKWebViewConfiguration { UserContentController = userController };
                var webView = new WKWebView(Frame, config);
                webView.ScrollView.MultipleTouchEnabled = false;
                webView.ScrollView.Bounces = false;
                SetNativeControl(webView);
            }
            if (e.OldElement != null)
            {
                Control.ScrollView.MultipleTouchEnabled = false;
                Control.ScrollView.Bounces = false;
                userController.RemoveAllUserScripts();
                userController.RemoveScriptMessageHandler("invokeAction");
                var hybridWebView = e.OldElement as ActivityHybridWebView;
                hybridWebView.Cleanup();
            }
            if (e.NewElement != null)
            {
                string localpath = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
                string url = Path.Combine(localpath, Element.Uri);
                Control.LoadFileUrl(new NSUrl("file://" + url), new NSUrl("file://" + Path.GetDirectoryName(url)));
                Task.Run(() =>
                {
                    Task.WaitAny(Task.Delay(2000));
                    InjectJS(JavaScriptFunction);
                    CallJS();
                });

            }
        }

这两行好像没有作用-

Control.ScrollView.MultipleTouchEnabled = false;
Control.ScrollView.Bounces = false;

webView.ScrollView.MultipleTouchEnabled = false;
webView.MultipleTouchEnabled = false;

Answer 1

你能更改网站代码吗？如果是，您可以通过在 html head 中添加以下标记来禁用那里的缩放:

<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />