flutter - Gridview.builder 从列表末尾开始

Question

我在小部件中有一个 Gridview.builder。当我打开小部件时，我想立即跳到网格列表的末尾。

class _StampsInTravelbookState extends State<StampsInTravelbook> {
  ScrollController _scrollController = new ScrollController();

  @override
  Widget build(BuildContext context) {
    if (_scrollController.hasClients) {
      _scrollController.jumpTo(_scrollController.position.maxScrollExtent);
    }
    return GridView.builder(
      controller: _scrollController,
      reverse: false,
      itemCount:
          Provider.of<UserPosProv>(context, listen: true).userStamps.length,
      shrinkWrap: true, 

但我总是一开始就有网格。

当我设置

反向：真

网格显示列表的结尾。

Answer 1

添加userStamps.reverse()

例子

class _StampsInTravelbookState extends State<StampsInTravelbook> {
  @override
  Widget build(BuildContext context) {
    final userStamps = Provider.of<UserPosProv>(context, listen: true).userStamps;
    userStamps.reverse(); // This line makes your userStamps list reversed.
    return GridView.builder(
      itemCount: userStamps.length,
      itemBuilder: (context, index) => // Your GridTile here,
      shrinkWrap: true,
    );
  }
}

Answer 2

我认为这对你有用

 _scrollController.animateTo(
        _scrollController.position.maxScrollExtent,
        duration: Duration(milliseconds: 500),
        curve: Curves.fastOutSlowIn);
``