5-3 Flutter App首页框架搭建-项目实践

5-3 APP首页框架搭建-项目实践

import 'package:flutter/material.dart';
import 'package:flutter_trip/pages/home_page.dart';
import 'package:flutter_trip/pages/my_page.dart';
import 'package:flutter_trip/pages/search_page.dart';
import 'package:flutter_trip/pages/travel_page.dart';

class TabNavigator extends StatefulWidget {
  @override
  _TabNavigatorState createState() => _TabNavigatorState();
}

class _TabNavigatorState extends State<TabNavigator> {

  final _defaultColor = Colors.grey;
  final _activeColor = Colors.blue;
  int _currentIndex = 0;
  final PageController _controller = PageController(
    initialPage: 0,
  );

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: PageView(
        controller: _controller,
        children: <Widget>[
          HomePage(),
          SearchPage(),
          TravelPage(),
          MyPage(),
        ],
      ),
      bottomNavigationBar: BottomNavigationBar(
          currentIndex: _currentIndex,
          onTap: (index) {
            _controller.jumpToPage(index);
            setState(() {
              _currentIndex = index;
            });
          },
          type: BottomNavigationBarType.fixed,
          items: [
        BottomNavigationBarItem(
          icon: Icon(Icons.home,color: _defaultColor),
          activeIcon: Icon(Icons.home, color: _activeColor),
          title: Text(
              '首页',
              style: TextStyle(
            color: _currentIndex != 0 ? _defaultColor : _activeColor
          )),
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.search,color: _defaultColor),
          activeIcon: Icon(Icons.search, color: _activeColor),
          title: Text(
              '搜索',
              style: TextStyle(
                  color: _currentIndex != 1 ? _defaultColor : _activeColor
              )),
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.camera_alt,color: _defaultColor),
          activeIcon: Icon(Icons.camera_alt, color: _activeColor),
          title: Text(
              '旅拍',
              style: TextStyle(
                  color: _currentIndex != 2 ? _defaultColor : _activeColor
              )),
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.account_circle,color: _defaultColor),
          activeIcon: Icon(Icons.account_circle, color: _activeColor),
          title: Text(
              '我的',
              style: TextStyle(
                  color: _currentIndex != 3 ? _defaultColor : _activeColor
              )),
        ),
      ]),
    );
  }

}

运行效果如下

Simulator Screen Shot - iPhone 11 Pro Max - 2019-11-12 at 16.28.39.png Simulator Screen Shot - iPhone 11 Pro Max - 2019-11-12 at 16.28.42.png Simulator Screen Shot - iPhone 11 Pro Max - 2019-11-12 at 16.28.44.png