Flutter TabBar的使用
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_app/list_main.dart';
class HomePageWidget extends StatefulWidget {
@override
State<StatefulWidget> createState() => _HomePageState();
}
class _HomePageState extends State<HomePageWidget> {
int _index = 0;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("主页"),
),
body: Column(
children: <Widget>[
Expanded(
child: Container(
child: Align(
child: getItemWidget(_index),
),
color: Colors.white,
margin: EdgeInsets.all(0),
),
),
buildTabBar()
],
),
);
}
Widget buildTabBar() {
return CupertinoTabBar(
currentIndex: _index,
items: buildBarItems(),
onTap: onTap,
);
}
List<BottomNavigationBarItem> buildBarItems() {
List<BottomNavigationBarItem> items = new List();
items.add(
BottomNavigationBarItem(icon: Icon(Icons.list), title: Text("列表")));
items.add(BottomNavigationBarItem(
icon: Icon(Icons.access_alarm), title: Text("电话")));
return items;
}
Widget getItemWidget(int index) {
if (index == 0) {
return ListPageState();
}
return Text("Page: $index");
}
void onTap(int index) {
setState(() {
_index = index;
});
}
}
