firka/flutter
firka/flutter
5
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Improve the SliverChildBuilderDelegate docs for folk to troubleshoot. (#103183)

Browse Source
This commit is contained in:
xubaolin 2022-06-08 04:53:07 +08:00 committed by GitHub
parent 48d04b5d80
commit da19a88ca2
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
packages/flutter/lib/src/widgets/sliver.dart
View File

@ -375,6 +375,11 @@ class SliverChildBuilderDelegate extends SliverChildDelegate {
/// Should return null if asked to build a widget with a greater index than
/// exists.
///
/// May result in an infinite loop or run out of memory if [childCount] is null
/// and the [builder] always provides a zero-size widget (such as `Container()`
/// or `SizedBox.shrink()`). If possible, provide children with non-zero size,
/// return null from [builder], or set a [childCount].
///
/// The delegate wraps the children returned by this builder in
/// [RepaintBoundary] widgets.
final NullableIndexedWidgetBuilder builder;
@ -383,6 +388,11 @@ class SliverChildBuilderDelegate extends SliverChildDelegate {
///
/// If null, the number of children is determined by the least index for which
/// [builder] returns null.
///
/// May result in an infinite loop or run out of memory if [childCount] is null
/// and the [builder] always provides a zero-size widget (such as `Container()`
/// or `SizedBox.shrink()`). If possible, provide children with non-zero size,
/// return null from [builder], or set a [childCount].
final int? childCount;
/// Whether to wrap each child in an [AutomaticKeepAlive].