[英]How can I change Icon colors when it's selected in flutter?
I'm new to flutter. I want to Icon colors be black except when they clicked.我是 flutter 的新手。我希望图标 colors 是黑色的,除非他们点击了。 Either the color doesn't change when I click, or I can't change the color of the clicked one.
要么当我点击时颜色没有改变,要么我不能改变点击的颜色。 I saw this ternary solution but I don't know why it isn't working.
我看到了这个三元解决方案,但我不知道为什么它不起作用。
class _RootAppState extends State<RootApp> {
int _selectedIndex = 0;
int? currentIndex;
static const TextStyle optionStyle =
TextStyle(fontSize: 30, fontWeight: FontWeight.bold);
static const List<Widget> _widgetOptions = <Widget>[
Text('Index 0: Home', style: optionStyle,),
...
];
void _onItemTapped(int index) {
setState(() {
_selectedIndex = index;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
/* appBar: AppBar(
title: const Text('BottomNavigationBar Sample'),
), */
body: Center(
child: _widgetOptions.elementAt(_selectedIndex),
),
bottomNavigationBar: BottomNavigationBar(
items: const <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(Icons.home, size: 25),
label: 'Home',
),...
],
currentIndex: _selectedIndex,
selectedItemColor: _selectedIndex == currentIndex ? Colors.black :Colors.amber[800],
onTap: _onItemTapped,
),
);
}
im pretty new to this too, looking from my app i just added this in try adding this in type: BottomNavigationBarType.fixed,
我对此也很陌生,从我的应用程序来看,我只是在尝试添加这个
type: BottomNavigationBarType.fixed,
Try using CupertinoTabScaffold .尝试使用CupertinoTabScaffold 。 In state changes, the color of the tab you are in will light up momentarily.
在 state 更改中,您所在的选项卡的颜色会瞬间亮起。 You can also change this color with Theme.
您也可以使用主题更改此颜色。
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