Question

我想使用此导航条形码，并且可以正常工作，但问题是我不知道如何使可轻敲的项目显示到我想要的飞镖文件？例如：添加：显示add.dart，列表：show list.dart和...

代码如下：

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

 void main() => runApp(MaterialApp(home: BottomNavBar()));

  class BottomNavBar extends StatefulWidget {
   @override
   _BottomNavBarState createState() => _BottomNavBarState();
  }

  class _BottomNavBarState extends State<BottomNavBar> {
   int _page = 0;
   GlobalKey _bottomNavigationKey = GlobalKey();

   @override
   Widget build(BuildContext context) {
    return Scaffold(
     bottomNavigationBar: CurvedNavigationBar(
      key: _bottomNavigationKey,
      index: 0,
      height: 50.0,
      items: <Widget>[
        Icon(Icons.add, size: 30),
        Icon(Icons.list, size: 30),
        Icon(Icons.compare_arrows, size: 30),
        Icon(Icons.call_split, size: 30),
        Icon(Icons.perm_identity, size: 30),
      ],
      color: Colors.white,
      buttonBackgroundColor: Colors.white,
      backgroundColor: Colors.blueAccent,
      animationCurve: Curves.easeInOut,
      animationDuration: Duration(milliseconds: 600),
      onTap: (index) {
        setState(() {
          _page = index;
        });
      },
    ),
    body: Container(
      color: Colors.blueAccent,
      child: Center(
        child: Column(
          children: <Widget>[
            Text(_page.toString(), textScaleFactor: 10.0),
            RaisedButton(
              child: Text('Go To Page of index 1'),
              onPressed: () {
                final CurvedNavigationBarState navBarState =
                    _bottomNavigationKey.currentState;
                navBarState.setPage(1);
              },
            )
          ],
        ),
      ),
    ));
   }
  }

Answer 1

您可以使用index来显示所需的页面。

import 'package:flutter/material.dart';
import 'package:curved_navigation_bar/curved_navigation_bar.dart';
import 'page1.dart'
import 'page2.dart'

void main() => runApp(MaterialApp(home: BottomNavBar()));

class BottomNavBar extends StatefulWidget {
  @override
  _BottomNavBarState createState() => _BottomNavBarState();
}

class _BottomNavBarState extends State<BottomNavBar> {
  int _pageIndex = 0;
  GlobalKey _bottomNavigationKey = GlobalKey();

  List pages = [
    MyRoute(
      iconData: Icons.add,
      page: Page1(),
    ),
    MyRoute(
      iconData: Icons.compare_arrows,
      page: Page2(),
    )
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      bottomNavigationBar: CurvedNavigationBar(
        key: _bottomNavigationKey,
        index: 0,
        height: 50.0,
        items: pages
            .map((p) => Icon(
                  p.iconData,
                  size: 30,
                ))
            .toList(),
        color: Colors.white,
        buttonBackgroundColor: Colors.white,
        backgroundColor: Colors.blueAccent,
        animationCurve: Curves.easeInOut,
        animationDuration: Duration(milliseconds: 600),
        onTap: (index) {
          setState(() {
            _pageIndex = index;
          });
        },
      ),
      backgroundColor: Colors.blueAccent,
      body: pages[_pageIndex].page,
    );
  }
}

class MyRoute {
  final IconData iconData;
  final Widget page;

  MyRoute({this.iconData, this.page});
}

page1.dart

class Page1 extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Center(child: Text('Page1'));
  }
}

page2.dart

class Page2 extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Center(child: Text('Page2'));
  }
}

Answer 2

您可以参考本教程，该教程将为您提供Flutter curved navigation bar

Answer 3

尝试使用此flutter插件 curved_navigation_bar 0.3.1

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

void main() => runApp(MaterialApp(home: BottomNavBar()));

class BottomNavBar extends StatefulWidget {
  @override
  _BottomNavBarState createState() => _BottomNavBarState();
}

class _BottomNavBarState extends State<BottomNavBar> {
  int _page = 0;
  GlobalKey _bottomNavigationKey = GlobalKey();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        bottomNavigationBar: CurvedNavigationBar(
          key: _bottomNavigationKey,
          index: 0,
          height: 50.0,
          items: <Widget>[
            Icon(Icons.add, size: 30),
            Icon(Icons.list, size: 30),
            Icon(Icons.compare_arrows, size: 30),
            Icon(Icons.call_split, size: 30),
            Icon(Icons.perm_identity, size: 30),
          ],
          color: Colors.white,
          buttonBackgroundColor: Colors.white,
          backgroundColor: Colors.blueAccent,
          animationCurve: Curves.easeInOut,
          animationDuration: Duration(milliseconds: 600),
          onTap: (index) {
            setState(() {
              _page = index;
            });
          },
        ),
        body: Container(
          color: Colors.blueAccent,
          child: Center(
            child: Column(
              children: <Widget>[
                Text(_page.toString(), textScaleFactor: 10.0),
                RaisedButton(
                  child: Text('Go To Page of index 1'),
                  onPressed: () {
                    final CurvedNavigationBarState navBarState =
                        _bottomNavigationKey.currentState;
                    navBarState.setPage(1);
                  },
                )
              ],
            ),
          ),
        ));
  }
}

弯曲的导航栏使其可轻敲

3 个答案: