Flutter 構(gòu)建一個CustomButton,組合RaiseButton和label.
//自定義CustomButton類方法
class CustomButton extends StatelessWidget {
final String label;
CustomButton(this.label);
@override
Widget build(BuildContext context) {
return RaisedButton(onPressed: () {}, child: Text(label));
}
}
//使用CustomButton乏盐，在頁面中間顯示一個“Hello”的按鈕
@override
Widget build(BuildContext context) {
return Center(
child: CustomButton("Hello"),
);
}
