Flutter 如何使按钮被选中

您应该在Buttons中有另一个字段final Function() onTap. 然后在定义按钮的地方实现它.

我的意思是这样的东西:

class Buttons extends StatelessWidget {
      const Buttons({
      Key key,
      @required this.selectBloc,
      @required this.isSelecteed,
      @required this.onTap,
    }) : super(key: key);

    final SelectBloc selectBloc;
    final bool isSelecteed;
    final Function() onTap;

    @override
    Widget build(BuildContext context) {
      return BlocBuilder<SelectBloc, SelectState>(
          bloc: selectBloc,
          builder: (context, state) {
            return OutlinedButton(
              onPressed: onTap,
            child: Text( dynamic, style: TextStyle(color: Colors.grey[500])),
            style: ButtonStyle(
              side: MaterialStateProperty.all(BorderSide(
                  color: isSelecteed
                      ? Colors.blue
                      : Colors.grey)),
            ),
          );
        });
  }
}

然后:

Buttons(
      selectBloc: selectBloc,
      isSelecteed: 1 == selectedIndex,
      onTap:(){
         selectedIndex = 1;
         setState((){});
      }
    ),

我希望您明白这一点:)