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A sliver that remains âpinnedâ to the top of the scroll view. Subsequent slivers scroll behind it. Typically the sliver is created as the first item in the list however it can be inserted anywhere and it will always stop at the top of the scroll view. When the scrolling axis is vertical, the PinnedHeaderSliverâs height is defined by its widget child. Multiple PinnedHeaderSlivers will layout one after the other, once they've scrolled to the top.

This sliver is preferable to the general purpose SliverPersistentHeader - for its relatively narrow use case - because there's no need to create a [SliverPersistentHeaderDelegate] or to predict the header's size.

Here's a [working demo in DartPad](https://dartpad.dev/?id=3b3f24c14fa201f752407a21ca9c9456).

https://github.com/flutter/flutter/assets/1377460/943f2e02-8e73-48b7-90be-61168978ff71

Related sliver utility PRs: https://github.com/flutter/flutter/pull/143538, https://github.com/flutter/flutter/pull/143325, https://github.com/flutter/flutter/pull/127340.

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hello_world

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layers

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platform_channel

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flutter_gallery.readme

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README.md

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README.md

Flutter Examples

This directory contains several examples of using Flutter. To run an example, use flutter run inside that example's directory. See the getting started guide to install the flutter tool.

For additional samples, see the flutter/samples repo.

Available examples include:

Hello, world The hello world app is a minimal Flutter app that shows the text "Hello, world!"
Flutter gallery The flutter gallery app no longer lives in this repo. Please see the gallery repo.
Layers The layers vignettes show how to use the various layers in the Flutter framework. For details, see the layers README.
Platform Channel The platform channel app demonstrates how to connect a Flutter app to platform-specific APIs. For documentation, see https://flutter.dev/platform-channels/.
Platform Channel Swift The platform channel swift app is the same as platform channel but the iOS version is in Swift and there is no Android version.

Notes

Note on Gradle wrapper files in .gitignore:

Gradle wrapper files should normally be checked into source control. The example projects don't do that to avoid having several copies of the wrapper binary in the Flutter repo. Instead, the Gradle wrapper is injected by Flutter tooling, and the wrapper files are .gitignore'd to avoid making the Flutter repository dirty as a side effect of running the examples.