如何在Webview Navigator.push按钮中添加自定义标题？

Question

我是扑朔迷离的新手，正在学习如何通过链接列表和navigator.push按钮使用webview。我想将自定义标题添加到生成的按钮，该怎么做？

我尝试通过直接放置字符串（“ website1”）来编辑Text（url），但是当我这样做时，链接将停止工作。

//这是主页代码：

import 'package:flutter/material.dart';
import 'web_view_container.dart';

class Home extends StatelessWidget {
  final _links = [
    'http://website1.com',
    'http://website2.com/'
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: SingleChildScrollView(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: _links.map((link) => _urlButton(context, link)),
          ),
        ),
      ),
    );
  }

  //buttons
  Widget _urlButton(BuildContext context, String url) {
    return Container(
      padding: EdgeInsets.all(20.0),
      child: FlatButton(
        color: Theme.of(context).primaryColor,
        padding: EdgeInsets.symmetric(horizontal: 50.0, vertical: 15.0),
        //here the buttons use either the url or a "title", ths problem is ging differente "titles"
        child: Text(url),
        onPressed: () => _handleURLButtonPress(context, url),
      ),
    );
  }

  //calls the url
  void _handleURLButtonPress(BuildContext context, String url) {
    Navigator.push(context,
        MaterialPageRoute(builder: (context) => WebViewContainer(url)));
  }
}

//这是webview容器的代码

import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';

class WebViewContainer extends StatefulWidget {
  final url;
  WebViewContainer(this.url);

  @override
  createState() => _WebViewContainerState(this.url);
}

class _WebViewContainerState extends State<WebViewContainer> {
  var _url;
  final _key = UniqueKey();

  _WebViewContainerState(this._url);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(),
        body: Column(children: [
          Expanded(
              child: WebView(
                  key: _key,
                  javascriptMode: JavascriptMode.unrestricted,
                  initialUrl: _url))
        ]));
  }
}

预期结果：能够使用带有自定义标题的主页按钮