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Improve docs for [PageStorage] (#63634)

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xubaolin 2020-08-22 02:16:04 +08:00 committed by GitHub
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packages/flutter/lib/src/widgets/page_storage.dart
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@ -130,8 +130,13 @@ class PageStorageBucket {
/// Usually you don't need to explicitly use a [PageStorage], since it's already
/// included in routes.
///
/// [PageStorageKey] is used by [Scrollable] if
/// `keepScrollOffset` is enabled to save their [ScrollPosition]s.
/// [PageStorageKey] is used by [Scrollable] if [ScrollController.keepScrollOffset]
/// is enabled to save their [ScrollPosition]s. When more than one
/// scrollable ([ListView], [SingleChildScrollView], [TextField], etc.) appears
/// within the widget's closest ancestor [PageStorage] (such as within the same route),
/// if you want to save all of their positions independently,
/// you should give each of them unique [PageStorageKey]s, or set some of their
/// `keepScrollOffset` false to prevent saving.
///
/// {@tool dartpad --template=freeform}
///