listview 在 ExpansionTile 中不工作
我试图在 ExpansionTile 中显示一个 listview.builder，但它抛出了一些异常
Card(
child: ExpansionTile(
leading: Icon(
Icons.stars,
color: Colors.pinkAccent,
),
title: Text('Reviews',
style: Theme.of(context).textTheme.title,
),
children: [
ListView.builder(
itemCount: 5,
itemBuilder: (_, i) {
return (Text('item $i'));
})
],
),
),
我想这样实现https://imgur.com/a/0lubABC
══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞═════════════════════════════════════════════════════════
I/flutter ( 8182): The following assertion was thrown during performResize():
I/flutter ( 8182): Vertical viewport was given unbounded height.
I/flutter ( 8182): Viewports expand in the scrolling direction to fill their container.In this case, a vertical
I/flutter ( 8182): viewport was given an unlimited amount of vertical space in which to expand. This situation
I/flutter ( 8182): typically happens when a scrollable widget is nested inside another scrollable widget.
I/flutter ( 8182): If this widget is always nested in a scrollable widget there is no need to use a viewport because
I/flutter ( 8182): there will always be enough vertical space for the children. In this case, consider using a Column
I/flutter ( 8182): instead. Otherwise, consider using the "shrinkWrap" property (or a ShrinkWrappingViewport) to size
I/flutter ( 8182): the height of the viewport to the sum of the heights of its children.
I/flutter ( 8182):
最佳答案
以上解决方案均未按预期工作。所以我已经解决了这个问题。您需要在 ExpansionTile 子级内的 Listview.builder() 中使用它:
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
完整代码:
ExpansionTile(
onExpansionChanged: (e){
//Your code
},
title: Text("You title text"),
children: [
ListView.builder(
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
scrollDirection: Axis.vertical,
itemCount: items.length,
itemBuilder: (BuildContext context, int index){
return Text(items[index]);
}
)
],
),
关于ExpansionTile 内的 ListView 不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/54152176/