Flutter：嵌套 ListView 有效嵌套的 SliverList 没有，但 ListView 包含 Slivers

问题描述

我遇到了一个特定的问题。我能够组成一个包含水平 ListView 的垂直外部 ListView。可以将其视为 Facebook 上的多个好友建议行堆叠在一起。这工作正常。

因为我想利用 SliverAppBar 附带的特权，我需要将 CustomScrollView 作为父 Widget，然后在其 slivers 中仅添加条子收藏。

当我尝试在 SliverList 中添加 SliverChildBuilderDelegate 时，我收到各种错误，主要是与渲染相关的类型错误。 SliverChildBuilderDelegate 可以构建的孩子类型似乎存在限制。

NEEDS-COMPOSITING-BITS-UPDATE:
  needs compositing
  creator: Viewport ← IgnorePointer-[GlobalKey#a5a09] ← Semantics ← Listener ← _GestureSemantics ←
    RawGestureDetector-[LabeledGlobalKey<RawGestureDetectorState>#db221] ← Listener ← _ScrollableScope
    ← _ScrollSemantics-[GlobalKey#57142] ← Scrollable ← CustomScrollView ← Padding ← ⋯
  parentData: <none> (can use size)
  constraints: BoxConstraints(w=412.0,0.0<=h<=Infinity)
  size: MISSING
  axisDirection: right
  crossAxisDirection: down
  offset: ScrollPositionWithSingleContext#415a2(offset: 0.0,range: null..null,viewport: null,ScrollableState,BouncingScrollPhysics -> RangeMaintainingScrollPhysics,IdleScrollActivity#74aea,ScrollDirection.idle)
  anchor: 0.0
This RenderObject had the following child:
    center child: RenderSliverList#5219f NEEDS-LAYOUT NEEDS-PAINT
════════════════════════════════════════════════════════════════════════════════════════════════════

Another exception was thrown: RenderBox was not laid out: RenderViewport#e26b4 NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE

Another exception was thrown: RenderBox was not laid out: RenderViewport#e26b4 NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE

Another exception was thrown: RenderBox was not laid out: RenderIgnorePointer#e30f7 relayoutBoundary=up10 NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE

Another exception was thrown: RenderBox was not laid out: RenderSemanticsAnnotations#d70ab relayoutBoundary=up9 NEEDS-PAINT
NEEDS-COMPOSITING-BITS-UPDATE

如您所见，我尝试将 SliverList 包装在非银条类型的 Widget 中，但无济于事。

我尝试使用 nestedScrollView 解决它，但我不断收到相同类型的错误。

有没有人遇到过这种情况。我查看了源代码，可以看到 ListView 基本上是一个带有内部 BoxScrollView 的 ScrollView。

我是否需要创建一个专门的 Widget 来完成这个布局设计。如果是这样的话，我已经对 Flutter 抓狂了。

解决方法

解决了。我所缺少的只是嵌套 height 的包含 width 中的 Container 和 SliverList。