问题描述
当我按下设备的后退按钮时,应用会关闭,因此我想配置设备的后退按钮以按顺序返回页面而不退出。谢谢
import 'package:Flutter/material.dart';
import 'package:webview_Flutter/webview_Flutter.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,title: 'Welcome to Flutter',home: Scaffold(
body: WebView(
initialUrl: "https://www.carrefourjordan.com",javascriptMode: JavascriptMode.unrestricted,),);
}
}
解决方法
您好,通过将支架包裹在willpopscope中来管理后退按钮的使用,可以使用Willpopscope并使用onwillpop属性
WillPopScope(
onWillPop: (){
// Navigator.push(context,MaterialPageRoute(builder: (context)=>Page()));
return Future.value(false);
},child: Scaffold(
body: WebView(
initialUrl: "https://www.carrefourjordan.com",javascriptMode: JavascriptMode.unrestricted,),);
,
您可以通过2个步骤来实现这一目标:
- 将脚手架包裹在
WillPopScope
中以捕获后退按钮按下事件 - 使用webview程序包InAppWebView控制器的
canGoback()
和goBack()
移到WeView中
尝试一下:
class MyApp extends StatelessWidget {
InAppWebViewController _webViewController;
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,title: 'Welcome to Flutter',home: WillPopScope(
onWillPop: _onBack,child: Scaffold(
body: InAppWebView(
initialUrl: "https://www.carrefourjordan.com",onWebViewCreated: (InAppWebViewController controller) {
_webViewController = controller;
},);
}
Future<bool> _onBack() async {
if (await _webViewController.canGoBack()) {
_webViewController.goBack(); // perform webview back operation
return false;
} else {
// Webpage in home page
return true; // Close App
}
}
}