垂直视口被赋予了无限的高度误差

本文介绍了垂直视口被赋予了无限的高度误差的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

 @override
 Widget build(BuildContext context) {
   return Column(
     children: <Widget>[
       new Text("Some text"),
       ListView()
     ],
   );
 }

 Widget ListView() {
   return ListView(
     padding: EdgeInsets.symmetric(vertical: 8.0),
     children: Item(),
   );
 }

 List<Item> Item() {
   return list
     .map((item) => Item(text: item))
     .toList();
 }

 class Item extends ListTile {
   Item({String text, GestureTapCallback onTap})
    : super(subtitle: Column(children: <Widget>[
        Text(text),
      ]));
 }

屏幕上出现空白，控制台显示:

A blank space appears on the screen and the console says:

垂直视口的高度不受限制.视口在滚动方向以填充其容器.

Vertical viewport was given unbounded height. Viewports expand in the scrolling direction to fill their container.

推荐答案

在Flex中包装ListView将使其正常工作.

Wrapping ListView inside Flexible will make it work.

Widget ListView() {
return new Flexible(child: new ListView(
    padding: new EdgeInsets.symmetric(vertical: 8.0),
    children: Item()));
}

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