[ios] Dynamic Content Resizing by LouiseHsu · Pull Request #177410 · flutter/flutter

LouiseHsu · 2025-10-22T20:21:35Z

This PR fixes #169147

This is the iOS implementation of #149033

In Add-to-App scenarios, a common desired use case is to have the embedded FlutterView be able to size itself based on it's content. Up till now, the size had to be manually specified, which can be tedious and inaccurate.

This PR adds a new flag, isAutoResizable, which enables the ability for the embedded flutter view to dynamically set it's own size based off it's content. Note that this feature will NOT work if the the embedded app is wrapped in flexible or unsized widgets, such as Scaffold. The FlutterView will just not display at all.

To use the new flag, just set it like

flutterViewController.autoResizable = true;

or in Swift

flutterViewController.isAutoResizable = true

Pre-launch Checklist

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

loic-sharma · 2025-11-04T17:42:05Z

+  CGRect flutterViewFrame = flutterView.frame;
+  CGSize flutterViewSize = flutterViewFrame.size;
+
+  XCTAssertTrue(flutterViewSize.height == 142);


Consider adding a comment as to how this size was determined. I imagine it's from manually examining the output of dev/integration_tests/ios_host_app/flutterapp/lib/resize? It might be worth adding link to this file in a the comment.

This reverts commit 216e512.

Reverts #177410 The change is causing the task `wide_gamut_ios` to hang every time. Local testing shows that reverting this commit fixes the problem.

flutter/flutter@d438df3...c8cfb2b 2025-11-22 flar@google.com Revert "[ios] Dynamic Content Resizing" (flutter/flutter#178958) 2025-11-22 ahmedsameha1@gmail.com Make sure that a SearchAnchor doesn't crash in 0x0 environment (flutter/flutter#177749) 2025-11-22 ahmedsameha1@gmail.com Make sure that a Stepper doesn't crash in 0x0 environment (flutter/flutter#178068) 2025-11-22 116356835+AbdeMohlbi@users.noreply.github.com Remove deprecated `activeColor` in `switch.0.dart` example (flutter/flutter#178293) 2025-11-22 ahmedsameha1@gmail.com Make sure that a UserAccountsDrawerHeader doesn't crash in 0x0 enviro… (flutter/flutter#178516) 2025-11-22 ahmedsameha1@gmail.com Make sure that a TimePickerDialog doesn't crash in 0x0 environment (flutter/flutter#178451) 2025-11-22 ahmedsameha1@gmail.com Make sure that a CupertinoLinearActivityIndicator doesn't crash in 0x… (flutter/flutter#178566) 2025-11-22 ahmedsameha1@gmail.com Make sure that a CupertinoTabBar doesn't crash in 0x0 environment (flutter/flutter#178613) 2025-11-22 ahmedsameha1@gmail.com Make sure that a CupertinoContextMenu doesn't crash in 0x0 environment (flutter/flutter#178722) 2025-11-22 97480502+b-luk@users.noreply.github.com Sort entries in TESTOWNERS (flutter/flutter#178939) 2025-11-22 louisehsu@google.com [ios] Dynamic Content Resizing (flutter/flutter#177410) 2025-11-21 engine-flutter-autoroll@skia.org Roll Skia from dc88b21ce7d2 to 3018c3053490 (2 revisions) (flutter/flutter#178947) 2025-11-21 kevmoo@users.noreply.github.com Manually roll material_color_utilities (flutter/flutter#170000) 2025-11-21 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from Y-cMdgKy3d6EnibWR... to 4ul9jvZ7jnDGIjtCD... (flutter/flutter#178934) 2025-11-21 engine-flutter-autoroll@skia.org Roll Dart SDK from c788b6a7aefd to 5af71c736b0a (1 revision) (flutter/flutter#178932) 2025-11-21 engine-flutter-autoroll@skia.org Roll Skia from c588bb60d5da to dc88b21ce7d2 (2 revisions) (flutter/flutter#178933) 2025-11-21 97480502+b-luk@users.noreply.github.com Update .ci.yaml and TESTOWNERS for arc macrobenchmark tests (flutter/flutter#178891) 2025-11-21 15619084+vashworth@users.noreply.github.com Use interactive mode with `devicectl` to redirect stdout (flutter/flutter#178405) 2025-11-21 okorohelijah@google.com Update .ci.yaml in flutter/flutter to use either macOS 15.5 or macOS … (flutter/flutter#178666) 2025-11-21 engine-flutter-autoroll@skia.org Roll Skia from d4e9d2873bfd to c588bb60d5da (1 revision) (flutter/flutter#178928) 2025-11-21 engine-flutter-autoroll@skia.org Roll Packages from b1e2fb0 to e67b6be (7 revisions) (flutter/flutter#178927) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC louisehsu@google.com,stuartmorgan@google.com on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

This PR fixes flutter#169147 This is the iOS implementation of flutter#149033 In Add-to-App scenarios, a common desired use case is to have the embedded FlutterView be able to size itself based on it's content. Up till now, the size had to be manually specified, which can be tedious and inaccurate. This PR adds a new flag, `isAutoResizable`, which enables the ability for the embedded flutter view to dynamically set it's own size based off it's content. Note that this feature will *NOT* work if the the embedded app is wrapped in flexible or unsized widgets, such as Scaffold. The FlutterView will just not display at all. To use the new flag, just set it like ``` flutterViewController.autoResizable = true; ``` or in Swift ``` flutterViewController.isAutoResizable = true ``` ## 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.

Reverts flutter#177410 The change is causing the task `wide_gamut_ios` to hang every time. Local testing shows that reverting this commit fixes the problem.

This is a reland of #177410 The previous pr was hitting deadlocks with tests that use screenshots. This reland fixes it by submitting frames asynchronously instead of synchronously. This PR fixes #169147 This is the iOS implementation of #149033 In Add-to-App scenarios, a common desired use case is to have the embedded FlutterView be able to size itself based on it's content. Up till now, the size had to be manually specified, which can be tedious and inaccurate. This PR adds a new flag, `isAutoResizable`, which enables the ability for the embedded flutter view to dynamically set it's own size based off it's content. Note that this feature will *NOT* work if the the embedded app is wrapped in flexible or unsized widgets, such as Scaffold. The FlutterView will just not display at all. To use the new flag, just set it like ``` flutterViewController.autoResizable = true; ``` or in Swift ``` flutterViewController.isAutoResizable = true ``` ## 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.

Add a content resizing sample for iOS to support flutter/flutter#177410 ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I have added sample code updates to the [changelog]. - [x] I updated/added relevant documentation (doc comments with `///`). If you need help, consider asking for advice on the #hackers-devrel channel on [Discord].  [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md [changelog]: ../CHANGELOG.md --------- Co-authored-by: Eric Windmill <eric@ericwindmill.com>

This PR fixes flutter#169147 This is the iOS implementation of flutter#149033 In Add-to-App scenarios, a common desired use case is to have the embedded FlutterView be able to size itself based on it's content. Up till now, the size had to be manually specified, which can be tedious and inaccurate. This PR adds a new flag, `isAutoResizable`, which enables the ability for the embedded flutter view to dynamically set it's own size based off it's content. Note that this feature will *NOT* work if the the embedded app is wrapped in flexible or unsized widgets, such as Scaffold. The FlutterView will just not display at all. To use the new flag, just set it like ``` flutterViewController.autoResizable = true; ``` or in Swift ``` flutterViewController.isAutoResizable = true ``` ## 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.

Reverts flutter#177410 The change is causing the task `wide_gamut_ios` to hang every time. Local testing shows that reverting this commit fixes the problem.

This is a reland of flutter#177410 The previous pr was hitting deadlocks with tests that use screenshots. This reland fixes it by submitting frames asynchronously instead of synchronously. This PR fixes flutter#169147 This is the iOS implementation of flutter#149033 In Add-to-App scenarios, a common desired use case is to have the embedded FlutterView be able to size itself based on it's content. Up till now, the size had to be manually specified, which can be tedious and inaccurate. This PR adds a new flag, `isAutoResizable`, which enables the ability for the embedded flutter view to dynamically set it's own size based off it's content. Note that this feature will *NOT* work if the the embedded app is wrapped in flexible or unsized widgets, such as Scaffold. The FlutterView will just not display at all. To use the new flag, just set it like ``` flutterViewController.autoResizable = true; ``` or in Swift ``` flutterViewController.isAutoResizable = true ``` ## 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.

This pr adds some docs to support dynamic content resizing for add to app scenarios. flutter/flutter#177410 ## Presubmit checklist - [x] If you are unwilling, or unable, to sign the CLA, even for a _tiny_, one-word PR, please file an issue instead of a PR. - [x] If this PR is not meant to land until a future stable release, mark it as draft with an explanation. - [x] This PR follows the [Google Developer Documentation Style Guidelines](https://developers.google.com/style)—for example, it doesn't use _i.e._ or _e.g._, and it avoids _I_ and _we_ (first-person pronouns). - [x] This PR uses [semantic line breaks](https://github.com/dart-lang/site-shared/blob/main/doc/writing-for-dart-and-flutter-websites.md#semantic-line-breaks) of 80 characters or fewer. --------- Co-authored-by: Shams Zakhour <44418985+sfshaza2@users.noreply.github.com> Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> Co-authored-by: Parker Lougheed <parlough@gmail.com> Co-authored-by: Loïc Sharma <737941+loic-sharma@users.noreply.github.com>

Add a content resizing sample for iOS to support flutter/flutter#177410 ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I have added sample code updates to the [changelog]. - [x] I updated/added relevant documentation (doc comments with `///`). If you need help, consider asking for advice on the #hackers-devrel channel on [Discord].  [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md [changelog]: ../CHANGELOG.md --------- Co-authored-by: Eric Windmill <eric@ericwindmill.com>

flutter/flutter@d438df3...c8cfb2b 2025-11-22 flar@google.com Revert "[ios] Dynamic Content Resizing" (flutter/flutter#178958) 2025-11-22 ahmedsameha1@gmail.com Make sure that a SearchAnchor doesn't crash in 0x0 environment (flutter/flutter#177749) 2025-11-22 ahmedsameha1@gmail.com Make sure that a Stepper doesn't crash in 0x0 environment (flutter/flutter#178068) 2025-11-22 116356835+AbdeMohlbi@users.noreply.github.com Remove deprecated `activeColor` in `switch.0.dart` example (flutter/flutter#178293) 2025-11-22 ahmedsameha1@gmail.com Make sure that a UserAccountsDrawerHeader doesn't crash in 0x0 enviro… (flutter/flutter#178516) 2025-11-22 ahmedsameha1@gmail.com Make sure that a TimePickerDialog doesn't crash in 0x0 environment (flutter/flutter#178451) 2025-11-22 ahmedsameha1@gmail.com Make sure that a CupertinoLinearActivityIndicator doesn't crash in 0x… (flutter/flutter#178566) 2025-11-22 ahmedsameha1@gmail.com Make sure that a CupertinoTabBar doesn't crash in 0x0 environment (flutter/flutter#178613) 2025-11-22 ahmedsameha1@gmail.com Make sure that a CupertinoContextMenu doesn't crash in 0x0 environment (flutter/flutter#178722) 2025-11-22 97480502+b-luk@users.noreply.github.com Sort entries in TESTOWNERS (flutter/flutter#178939) 2025-11-22 louisehsu@google.com [ios] Dynamic Content Resizing (flutter/flutter#177410) 2025-11-21 engine-flutter-autoroll@skia.org Roll Skia from dc88b21ce7d2 to 3018c3053490 (2 revisions) (flutter/flutter#178947) 2025-11-21 kevmoo@users.noreply.github.com Manually roll material_color_utilities (flutter/flutter#170000) 2025-11-21 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from Y-cMdgKy3d6EnibWR... to 4ul9jvZ7jnDGIjtCD... (flutter/flutter#178934) 2025-11-21 engine-flutter-autoroll@skia.org Roll Dart SDK from c788b6a7aefd to 5af71c736b0a (1 revision) (flutter/flutter#178932) 2025-11-21 engine-flutter-autoroll@skia.org Roll Skia from c588bb60d5da to dc88b21ce7d2 (2 revisions) (flutter/flutter#178933) 2025-11-21 97480502+b-luk@users.noreply.github.com Update .ci.yaml and TESTOWNERS for arc macrobenchmark tests (flutter/flutter#178891) 2025-11-21 15619084+vashworth@users.noreply.github.com Use interactive mode with `devicectl` to redirect stdout (flutter/flutter#178405) 2025-11-21 okorohelijah@google.com Update .ci.yaml in flutter/flutter to use either macOS 15.5 or macOS … (flutter/flutter#178666) 2025-11-21 engine-flutter-autoroll@skia.org Roll Skia from d4e9d2873bfd to c588bb60d5da (1 revision) (flutter/flutter#178928) 2025-11-21 engine-flutter-autoroll@skia.org Roll Packages from b1e2fb0 to e67b6be (7 revisions) (flutter/flutter#178927) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC louisehsu@google.com,stuartmorgan@google.com on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

LouiseHsu and others added 4 commits October 22, 2025 12:34

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Merge branch 'master' into ios-resizing-final

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github-actions Bot added platform-ios iOS applications specifically engine flutter/engine related. See also e: labels. team-ios Owned by iOS platform team labels Oct 22, 2025

LouiseHsu and others added 10 commits October 22, 2025 15:13

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Merge branch 'master' into ios-resizing-final

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LouiseHsu changed the title ~~Ios resizing~~ [ios] Dynamic Content Resizing Nov 3, 2025

LouiseHsu marked this pull request as ready for review November 3, 2025 23:00

LouiseHsu requested a review from a team as a code owner November 3, 2025 23:00

LouiseHsu requested review from loic-sharma and mboetger November 3, 2025 23:01