嗨,我的WebView flutter应用程序有问题,我有一个浮动操作按钮,但点击时不会刷新
我的工厂所在的代码是:
import 'dart:async';
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';
class HomePage extends StatefulWidget {
HomePage({Key key}) : super(key: key);
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
WebViewController _myController;
final Completer<WebViewController> _controller =
Completer<WebViewController>();
@override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
body: WebView(
initialUrl: 'https://syncshop.online/en/',
javascriptMode: JavascriptMode.unrestricted,
onWebViewCreated: (controller) {
_myController = controller;
},
onPageFinished: (initialUrl) {
_myController.evaluateJavascript("document.getElementsByClassName('footer-container')[0].style.display='none';");
},
),
floatingActionButton: FloatingActionButton(
onPressed: () {
_myController?.reload();
},
child: Icon(Icons.refresh),
),
),
);
}
}
FAB存在,但在按下时不刷新Webview URL
您有两个Web View Controller实例。
WebViewController _myController
Completer<WebViewController> _controller
正在发生的事情是_myController被分配了一个值,但是还没有任何数据。
我建议将_controller
实例与以下代码一起使用:
onWebViewCreated: (controller) {
_controller.complete(controller)
}
和FAB按钮为:
floatingActionButton: FutureBuilder<WebViewController>(
future: _controller.future,
builder: (BuildContext context, AsyncSnapshot<WebViewController> controller) {
if (controller.hasData) {
return FloatingActionButton(
onPressed: () {
controller.reload();
},
child: Icon(Icons.refresh),
);
}
return Container();
}),
Completer
的上述用法只允许在_contoller
有一些数据要重新加载后才显示FAB。
请参阅此示例代码以获取更多详细信息:https://github.com/flutter/plugins/blob/master/packages/webview_flutter/example/lib/main.dart