按下按钮时如何在Flutter上更改文本样式
有人知道按下按钮时如何在Flutter上更改文本样式吗?
例如,我有这样的代码:
class _scanningState extends State<scan> { String strText = 'ABCDEFG';
@override
Widget build(BuildContext context) {
return Scaffold(backgroundColor: Colors.blue,
body: new Column(
children: <Widget>[
new Text(strText),
new RaisedButton(
child: new Text('Button'),
onPressed: (){
//Change text style of strText()???
},
)
],
)
);
}
回答:
class _scanningState extends State<scanning> { bool pressed = true;
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.blue,
body: new Column(
children: <Widget>[
new Text(strText,
style: pressed
? TextStyle(color: Colors.black)
: TextStyle(color:Colors.green),
),
new RaisedButton(
child: new Text(
'Change color'),
onPressed: () {
setState(() {
pressed = !pressed;
});
},
)
],
));
}
也许您想更改兄弟文本。概念是相同的。快乐扑
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