在Flutter中,可以通过自定义AppBar来实现自定义导航条。
首先,创建一个新的StatefulWidget类来定义自定义导航条:
import 'package:flutter/material.dart';
class CustomAppBar extends StatelessWidget implements PreferredSizeWidget {
final String title;
final List<Widget> actions;
CustomAppBar({required this.title, this.actions = const []});
@override
Widget build(BuildContext context) {
return AppBar(
title: Text(title),
actions: actions,
);
}
@override
Size get preferredSize => Size.fromHeight(kToolbarHeight);
}
然后,在你的页面中使用CustomAppBar来替代默认的AppBar:
Scaffold(
appBar: CustomAppBar(title: 'Custom Navigation Bar', actions: [
IconButton(
icon: Icon(Icons.search),
onPressed: () {
// Handle search action
},
),
IconButton(
icon: Icon(Icons.settings),
onPressed: () {
// Handle settings action
},
),
]),
body: Center(
child: Text('Custom Navigation Bar Example'),
),
);
通过这种方式,你可以自定义导航条的标题和右侧操作按钮,并在页面中使用自定义的导航条。