flutter - Flutter 无法获取 ontap 函数来更改布尔列表

Question

伙计们，我一直在尝试让每个按钮更改布尔列表，并且当列表对于某个索引为 true 时出现严重故障时，容器变得可见。问题是由于某种原因我的手势按钮不想更改布尔列表但是更改任何其他整数列表都没有问题。

我一直试图让这个简单的事情工作几天，任何帮助都是好的。

我的代码：

import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';

class FilterRow extends StatefulWidget {
  @override
  FilterRow({Key key, this.title}) : super(key: key);

  final String title;
  _FilterRowState createState() => _FilterRowState();
}

class _FilterRowState extends State<FilterRow> {
  int _filterIndex = 0;
  List<bool> list = [
    false,
    false,
    false,
    false,
  ];

  List<IconData> _filter = [FontAwesomeIcons.filter];
  List<IconData> _filtericons = [
    FontAwesomeIcons.clock,
    FontAwesomeIcons.moneyBill,
    FontAwesomeIcons.globe,
  ];
  List<IconData> _uppericons = [
    FontAwesomeIcons.cog,
    FontAwesomeIcons.bookmark,
    FontAwesomeIcons.user,
  ];
  @override
  Widget build(BuildContext context) {
    return Row(children: <Widget>[
      SizedBox(
          width: 100.0,
          child: Container(
            height: 270.0,
            padding: EdgeInsets.only(
              left: 15,
            ),
            child: Column(children: <Widget>[
              Row(
                  mainAxisSize: MainAxisSize.min,
                  mainAxisAlignment: MainAxisAlignment.start,
                  children: <Widget>[
              ),
              Column(
                children: <Widget>[
                  GestureDetector(
                    behavior: HitTestBehavior.translucent,
                    onTap: () {
                      setState(() {
                        list[0] = false;
                        list[1] = true;
                        list[2] = false;
                        list[3] = false;
                      });
                    },
                    child: Container(
                      height: 60.0,
                      width: 60.0,
                      decoration: BoxDecoration(
                        color: Theme.of(context).accentColor,
                        borderRadius: BorderRadius.circular(30.0),
                      ),
                      child: Icon(_filtericons[0],
                          size: 25.0, color: Theme.of(context).primaryColor),
                    ),
                  ),
                    ),
                  ),
                ],
              )
            ]),
          )),
      Container(
        padding: EdgeInsets.only(left: 10),
        child: Column(
          children: <Widget>[
            Visibility(
                visible: false
                    ? list = [
                        false,
                        true,
                        false,
                        false,
                      ]
                    : true,
                child: Container(
                  height: 270.0,
                  width: 320.0,
                  decoration: BoxDecoration(
                    color: Theme.of(context).accentColor,
                    borderRadius: BorderRadius.circular(30.0),
                  ),
                )),
            Visibility(
                visible: false,
                child: Container(
                  height: 270.0,
                  width: 320.0,
                  decoration: BoxDecoration(
                    color: Theme.of(context).accentColor,
                    borderRadius: BorderRadius.circular(30.0),
                  ),
                )),
            Visibility(
                visible: false,
                child: Container(
                  height: 270.0,
                  width: 320.0,
                  decoration: BoxDecoration(
                    color: Theme.of(context).accentColor,
                    borderRadius: BorderRadius.circular(30.0),
                  ),
                )),
          ],
        ),
      )
    ]);
  }
}

标签： flutter

Answer 1

将 List 变量放入 Widget 函数中。

Widget build(Context context) {

 List<bool> list = [
    false,
    false,
    false,
    false,
  ];

return // your code

}