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Asked:2020-06-03 02:04:17 +0000 UTC2020-06-03 02:04:17 +0000 UTC

SliverList 中的无限列表视图

  • 772

添加后：

return SliverList(
   delegate: SliverChildBuilderDelegate((contextSli, indexSli) {

ListView变得无限（项目结束并重新开始）。

如何修复列表无穷大？

Widget build(BuildContext context) {
  return SliverList(
    delegate: SliverChildBuilderDelegate((contextSli, indexSli) {
      return ListView.builder(
          physics: physics,
          shrinkWrap: shrinkWrap,
          itemCount: itemCount,
          controller: controller,
          reverse: reverse,
          primary: primary,
          itemBuilder: (context, i) {
            final TimelineModel model = itemBuilder(context, i);
            model.isFirst = reverse ? i == (itemCount - 1) : i == 0;
            model.isLast = reverse ? i == 0 : i == (itemCount - 1);
            switch (position) {
              default:
                return TimelineItemLeft(properties: properties, model: model);
            }
          });
    }),
  );
}
flutter

1 个回答

  1. Best Answer

    SliverChildBuilderDelegate它本身是一个列表构建器，因此您最终会得到一个列表中的列表（无限）。

    它会是这样的：

    return CustomScrollView(
  reverse: reverse,
  physics: physics,
  primary: primary,
  shrinkWrap: shrinkWrap,
  controller: controller,
  slivers: [
    SliverList(
      delegate: SliverChildBuilderDelegate(
        (context, i) {
            final TimelineModel model = itemBuilder(context, i);
            model.isFirst = reverse ? i == (itemCount - 1) : i == 0;
            model.isLast = reverse ? i == 0 : i == (itemCount - 1);
            switch (position) {
              default:
                return TimelineItemLeft(properties: properties, model: model);
            }
        },
        childCount: itemCount,
      ),
    ),
  ],
);
    • 1

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