Flutter错误:RangeError(索引):无效值:不在0..2范围内(包括3) [英] Flutter Error: RangeError (index): Invalid value: Not in range 0..2, inclusive: 3

问题描述

我在扑朔迷离中使用了一长串.所有项目都可以正常渲染，但还会出现以下错误:

I am using a long list in flutter. All the items are rendering fine but also following error :

RangeError (index): Invalid value: Not in range 0..2, inclusive: 3

以下是我的代码:

@override
Widget build(BuildContext context) {
return Container(
  child: getList(),
 );
}

以下是我的getList()方法:

Following is my getList() method :

Widget getList (){
List<String> list = getListItems();
ListView myList = new ListView.builder(itemBuilder: (context, index){
  return new ListTile(
    title: new Text(list[index]),
  );
});
return myList;
}

以下是我的getListItem()方法:

And following is my getListItem() method:

List<String> getListItems(){
return ["Faizan", "Usman", "Naouman"];
}

以下是错误的屏幕截图:

Following is the screenshot of error :

推荐答案

您应该将itemCount参数传递给ListView.builder，以使其能够了解商品计数

You should pass the itemCount parameter to the ListView.builder to allow it to know the item count

Widget getList() {
  List<String> list = getListItems();
  ListView myList = new ListView.builder(
    itemCount: list.length,
    itemBuilder: (context, index) {
    return new ListTile(
      title: new Text(list[index]),
    );
  });
  return myList;
}

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