flutter 帶未讀訊息的底部導航

劉成發表於2018-11-16
Flutter

flutter_bottom_tab_bar

screenshot.png

bottom_tab_bar, 用法和bottom_navigation_bar一樣，但是新增了一些屬性的用法

items : List<BottomTabBarItem>

bottom navigation bar 裡面的 icon and title.

onTap : ValueChanged<int>

回撥，帶的是tab的index The callback that is called when a item is tapped.

The widget creating the bottom navigation bar needs to keep track of the current index and call setState to rebuild it with the newly provided index.

currentIndex : int

The index into [items] of the current active item. 當前啟用的是哪一個tab

type : BottomTabBarType

Defines the layout and behavior of a [BottomTabBar].

See documentation for [BottomTabBarType] for information on the meaning of different types.

fixedColor : Color

The color of the selected item when bottom navigation bar is [BottomTabBarType.fixed].

If [fixedColor] is null then the theme's primary color, [ThemeData.primaryColor], is used. However if [BottomTabBar.type] is [BottomTabBarType.shifting] then [fixedColor] is ignored.

iconSize : double

The size of all of the [BottomTabBarItem] icons.

See [BottomTabBarItem.icon] for more information.

[新增] isAnimation : bool

動畫是否開啟，預設是開起的

[新增] badgeColor : Color

未讀訊息的顏色，預設是fixedColor

[新增] isInkResponse : bool

按壓水墨屏效果是否開啟，預設是開啟的， 還是帶動畫的，不太適合我們的正常專案

[新增] badge : Widget

未讀訊息，是一個widget，可以自定義樣式

[新增] badgeNo : String

未讀訊息

How to Use?

first import dependeny in pubspec.yaml

dependencies:
  flutter:
    sdk: flutter
  bottom_tab_bar:
    git: https://github.com/LiuC520/flutter_bottom_tab_bar.git

複製程式碼

example:


class HomeState extends State<Home> with SingleTickerProviderStateMixin {
  TabController _tabController;
  int _selectedIndex = 1;
  String badgeNo1;
  var titles = ['home', 'video', 'find', 'smallvideo', 'my'];
  var icons = [
    Icons.home,
    Icons.play_arrow,
    Icons.child_friendly,
    Icons.fiber_new,
    Icons.mic_none
  ];
  @override
  void initState() {
    super.initState();
    _tabController =
        new TabController(vsync: this, initialIndex: 1, length: titles.length);
    badgeNo1 = '12';
  }

  void _onItemSelected(int index) {
    setState(() {
      _selectedIndex = index;
      badgeNo1 = '';
    });
  }

  final _widgetOptions = [
    Text('Index 0: Home'),
    Text('Index 1: Video'),
    Text('Index 2: find someone'),
    Text('Index 3: small Video'),
    Text('Index 4: My'),
  ];
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Bottom Tab Bar'),
        actions: <Widget>[new Icon(Icons.photo_camera)],
      ),
      bottomNavigationBar: BottomTabBar(
        items: <BottomTabBarItem>[
          BottomTabBarItem(
              icon: Icon(icons[0]), title: Text(titles[0]), badgeNo: badgeNo1),
          BottomTabBarItem(icon: Icon(icons[1]), title: Text(titles[1])),
          BottomTabBarItem(icon: Icon(icons[2]), title: Text(titles[2])),
          BottomTabBarItem(
              icon: Icon(icons[3]),
              activeIcon: Icon(icons[3]),
              title: Text(titles[3])),
          BottomTabBarItem(icon: Icon(icons[4]), title: Text(titles[4])),
        ],
        fixedColor: Colors.blue,
        currentIndex: _selectedIndex,
        onTap: _onItemSelected,
        type: BottomTabBarType.fixed,
        isAnimation: false,
        isInkResponse: false,
        badgeColor: Colors.green,
      ),
      body: Center(
        child: _widgetOptions.elementAt(_selectedIndex),
      ),
    );
  }
}

複製程式碼

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