从小部件列表访问小部件类

Question

我制作了一个小部件列表，我想访问 DayButton 类中的 setter，但是当我尝试 days[index]. 时，它不显示 setter 方法，它会将输出视为一般小部件而不是 @ 987654323@小部件

这里是代码。

class DayButtonRow extends StatefulWidget{

  @override
  DBRState createState() => DBRState();
}

class DBRState extends State<DayButtonRow>{

  currentDay(int i){
    setState(() {
      current = days.elementAt(i).key;
      //I want to access the setter here to change the color of the button
    });
  }

  @override
  Widget build(BuildContext context) {
    currentDay(3);
    return Padding(
      padding: const EdgeInsets.only(top: 8.0),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: days
      ),
    );
  }
}

Key current;
List<Widget> days = [
  DayButton("MON"),
  DayButton("TUE"),
  DayButton("WED"),
  DayButton("THU"),
  DayButton("FRI"),
  DayButton("SAT"),
  DayButton("SUN"),
];

有没有办法从列表中访问DayButton 小部件类？

Answer 1

如cmets中所述，将其声明为List<DayButton>：

List<DayButton> days = [
  DayButton("MON"),
  DayButton("TUE"),
  DayButton("WED"),
  DayButton("THU"),
  DayButton("FRI"),
  DayButton("SAT"),
  DayButton("SUN"),
];