webview_flutter 扩展

项目地址： github.com/bineanzhou/…

webview_flutter 0.3.14+1扩展 部分功能官方不支持，需要自己实现,目前支持

support Android consoleMessageDelegate

（iOS暂时拿不到 console只能通过注册javascriptChannels方式打印日志）

 WebView(
          consoleMessageDelegate: (ConsoleMessage consoleMessage) {
            print('consoleMessageDelegate $consoleMessage}');
            return NavigationDecision.navigate;
          },
        );

support Android jsAlert

js报错信息

webview_flutter Unable to create JsDialog without an Activity

由于WebViewFactory create 参数是 SingleViewPresentation.PresentationContext 无法拿到Activity

修改为 containerView.getContext()即可

public final class WebViewFactory extends PlatformViewFactory {
  private final BinaryMessenger messenger;
  private final View containerView;

  WebViewFactory(BinaryMessenger messenger, View containerView) {
    super(StandardMessageCodec.INSTANCE);
    this.messenger = messenger;
    this.containerView = containerView;
  }

  @SuppressWarnings("unchecked")
  @Override
  public PlatformView create(Context context, int id, Object args) {
    Map<String, Object> params = (Map<String, Object>) args;
//    return new FlutterWebView(context, messenger, id, params, containerView);
    return new FlutterWebView(containerView.getContext(), messenger, id, params, containerView);
  }
}

SingleViewPresentation.PresentationContext context = new SingleViewPresentation.PresentationContext(this.getContext(), this.state.windowManagerHandler);
        if (this.state.platformView == null) {
            this.state.platformView = this.viewFactory.create(context, this.viewId, this.createParams);
        }

support iOS jsAlert

添加_webView.UIDelegate = self;

- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler{
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:message?:@"" preferredStyle:UIAlertControllerStyleAlert];
    [alertController addAction:([UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler();
    }])];
    [_viewController presentViewController:alertController animated:YES completion:nil];
    
}
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler{
    //    DLOG(@"msg = %@ frmae = %@",message,frame);
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:message?:@"" preferredStyle:UIAlertControllerStyleAlert];
    [alertController addAction:([UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(NO);
    }])];
    [alertController addAction:([UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(YES);
    }])];
    [_viewController presentViewController:alertController animated:YES completion:nil];
}
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * _Nullable))completionHandler{
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:prompt message:@"" preferredStyle:UIAlertControllerStyleAlert];
    [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.text = defaultText;
    }];
    [alertController addAction:([UIAlertAction actionWithTitle:@"完成" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(alertController.textFields[0].text?:@"");
    }])];
    
    
    [_viewController presentViewController:alertController animated:YES completion:nil];
}