列内的ListView导致“垂直视口被赋予无限制的高度”

  • Z时代
  • 2024-01-10
  • 分类：问答

我是新手，对布局有麻烦。

粘性标题和其下方的滚动视图。我想到了使用带有两个子项的Column小部件-第一个是标题，第二个是ListView。

这是我的代码

 Widget build(BuildContext context) {
 return Material(
   elevation: 8.0,
   child: Column(
     crossAxisAlignment: CrossAxisAlignment.start,
     children: <Widget>[
       Padding(
         padding: const EdgeInsets.all(16.0),
         child: Text(
           title,
           style:
               Theme.of(context).textTheme.subhead.copyWith(fontSize: 18.0),
           textAlign: TextAlign.left,
         ),
       ),
       Divider(height: 4.0),
       ListView.builder(itemBuilder: (context, i) {
         return ListTile(
           title: Text("Title $i"),
           subtitle: Text("Subtitle $i"),
         );
       }),
     ],
   ),
 );
}

I am getting the following error for it.

I/flutter ( 5725): ══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞═════════════════════════════════════════════════════════
I/flutter ( 5725): The following assertion was thrown during performResize():
I/flutter ( 5725): Vertical viewport was given unbounded height.
I/flutter ( 5725): Viewports expand in the scrolling direction to fill their container.In this case, a vertical
I/flutter ( 5725): viewport was given an unlimited amount of vertical space in which to expand. This situation
I/flutter ( 5725): typically happens when a scrollable widget is nested inside another scrollable widget.
I/flutter ( 5725): If this widget is always nested in a scrollable widget there is no need to use a viewport because
I/flutter ( 5725): there will always be enough vertical space for the children. In this case, consider using a Column
I/flutter ( 5725): instead. Otherwise, consider using the "shrinkWrap" property (or a ShrinkWrappingViewport) to size
I/flutter ( 5725): the height of the viewport to the sum of the heights of its children.

如消息中所述，我添加了使ListView的rinkleWrap为true的功能，但这

也不起作用。

此布局的父级是一个包含各种此类布局页面的堆栈，所有

这些布局页面都在后台被一个用户选择了。

我究竟做错了什么？

回答：

尝试ListView.builder使用Flexible或Expanded小部件包装：

Flexible(
            child: ListView.builder(
              itemBuilder: (context, i) {
                return ListTile(
                  title: Text("Title $i"),
                  subtitle: Text("Subtitle $i"),
                );
              },
            ),
          ),

以上是 列内的ListView导致“垂直视口被赋予无限制的高度” 的全部内容， 来源链接： utcz.com/qa/405407.html

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