小编Jac*_*fer的帖子

我试图使用Flutter编写应用程序，但是每次添加ListView时，都会在运行时引发以下异常：Vertical viewport was given unbounded height。ListView没有嵌套在另一个可滚动的小部件中，即使使用文档中的ListView.builder示例代码，我也会收到错误消息。这是导致问题的代码：

import 'package:flutter/material.dart';
import '../ui/app_drawer.dart';
import '../ui/fgroup_button.dart';
import '../ui/custom_icons.dart';
import '../screens/cereales.dart';

class DayDisplay extends StatefulWidget {
  final List<String> title;
  final List<Map<String, int>> values;

  DayDisplay(List<String> title, List<Map<String, int>> values):
      this.title = title, this.values = values;
  @override
  _DayDisplayState createState() => new _DayDisplayState();

}

class _DayDisplayState extends State<DayDisplay> {
  int index = 0;
  @override
  Widget build(BuildContext context) {
    return new Column(
      children: <Widget>[
    new Container(
      margin: EdgeInsetsDirectional.only(top:5.0) ,
    child: new Column(
      mainAxisSize: MainAxisSize.min,
      mainAxisAlignment: MainAxisAlignment.center,
      children: …