小编Abh*_*hGo的帖子

按钮图像

我定义了一个 RoundIconButton 来增加用户点击按钮时的计数。如果用户需要将计数增加 50，则必须点击 50 次。

当用户点击并按住时，如何更改按钮以连续增加计数？

int age = 20;

RoundIconButton(
 icon: FontAwesomeIcons.plus,
 onPressed: () {
 setState(() {
 age++;
});

class RoundIconButton extends StatelessWidget {
  RoundIconButton({@required this.icon, @required this.onPressed});

  final IconData icon;
  final Function onPressed;

  @override
  Widget build(BuildContext context) {
    return RawMaterialButton(
      child: Icon(icon),
      onPressed: onPressed,
      elevation:
      6.0, // will show only when onpress is defined. it is disabled by default.
      shape: CircleBorder(),
      fillColor: Color(0xFF4C4F5E),
      constraints: BoxConstraints.tightFor(
        width: 56.0,
        height: 56.0,
      ),
    );
  }
}