Kate Lovett 460d55e659
Bump Dart to 3.9 (#179041)
Prep for https://github.com/flutter/flutter/issues/178827

This bumps Dart to 3.9.

We are holding off on 3.10 until we can include best practices for dot
shorthands in the style guide, which will follow the lint update in
#178827

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

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<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md
2025-11-25 00:41:40 +00:00
..
2025-11-25 00:41:40 +00:00

iOS Add2App Life Cycle Test

This application demonstrates some basic functionality for Add2App, along with a native iOS ViewController as a baseline and to demonstrate interaction.

The following functionality is currently implemented:

  1. A regular iOS view controller (UIViewController), similar to the default flutter create template (NativeViewController.m).
  2. A FlutterViewController subclass that takes over the full screen. Demos showing this both from a cold/fresh engine state and a warm engine state (FullScreenViewController.m).
  3. A demo of pushing a FlutterViewController on as a child view.
  4. A demo of showing both the native and the Flutter views using a platform channel to interact with each other (HybridViewController.m).
  5. A demo of showing two FlutterViewControllers simultaneously (DualViewController.m).

A few key things are tested here (IntegrationTests.m):

  1. The ability to pre-warm the engine and attach/detach a ViewController from it.
  2. The ability to use platform channels to communicate between views.
  3. The ability to simultaneously run two instances of the engine.
  4. That a FlutterViewController can be freed when no longer in use (also tested from FlutterViewControllerTests.m).
  5. That a FlutterEngine can be freed when no longer in use.