[RN][iOS] Makes fix Switch layout with iOS26#53067
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matinzd
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Aug 8, 2025
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Asked a question just for me knowledge
| Size SwitchShadowNode::measureContent( | ||
| const LayoutContext& /*layoutContext*/, | ||
| const LayoutConstraints& layoutConstraints) const { | ||
| if (iosSwitchSize.width != 0){ |
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Why just checking the width? 🤔
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Just because it is to verify whether the struct has been initialized or not. Checking for both is redundant.
Width and height are 0 only if we never cached the values, so when the struct has just been created. Once the values are cached, it will never be 0 again.
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Summary: Apple changed the sizes of the UISwitchComponent and now, if you build an iOs app using the <Switch> component, the layout of the app will be broken because of wrong layout measurements. This has been reported also by [https://github.com/facebook/react-native/issues/52823](https://github.com/facebook/react-native/issues/52823). The `<Switch>` component was using hardcoded values for its size. This change fixes the problem by: - Using codegen for interface only - Implementing a custom Sadow Node to ask the platform for the Switch measurements - Updating the JS layout to wrap the size around the native component. ## Changelog: [iOS][Fixed] - Fix Switch layout to work with iOS26 Pull Request resolved: #53067 Test Plan: Tested locally with RNTester. | iOS Version | Before | After | | --- | --- | --- | | < iOS 26 |  |  | | >=--sanitized-- Rollback Plan: Differential Revision: D79653120 Pulled By: cipolleschi
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This pull request was exported from Phabricator. Differential Revision: D79653120 |
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This pull request was successfully merged by @cipolleschi in 690fab6 When will my fix make it into a release? | How to file a pick request? |
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Summary: Pull Request resolved: #53247 Apple changed the sizes of the UISwitchComponent and now, if you build an iOs app using the <Switch> component, the layout of the app will be broken because of wrong layout measurements. This has been reported also by [https://github.com/facebook/react-native/issues/52823](https://github.com/facebook/react-native/issues/52823). The `<Switch>` component was using hardcoded values for its size. This change fixes the problem by: - Using codegen for interface only - Implementing a custom Sadow Node to ask the platform for the Switch measurements - Updating the JS layout to wrap the size around the native component. ## Changelog: [iOS][Fixed] - Fix Switch layout to work with iOS26 Pull Request resolved: #53067 Test Plan: Tested locally with RNTester. | iOS Version | Before | After | | --- | --- | --- | | < iOS 26 |  |  | | >=--sanitized-- Rollback Plan: Differential Revision: D79653120 Pulled By: cipolleschi
cipolleschi
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Summary: Pull Request resolved: #53247 Apple changed the sizes of the UISwitchComponent and now, if you build an iOs app using the <Switch> component, the layout of the app will be broken because of wrong layout measurements. This has been reported also by [https://github.com/facebook/react-native/issues/52823](https://github.com/facebook/react-native/issues/52823). The `<Switch>` component was using hardcoded values for its size. This change fixes the problem by: - Using codegen for interface only - Implementing a custom Sadow Node to ask the platform for the Switch measurements - Updating the JS layout to wrap the size around the native component. [iOS][Fixed] - Fix Switch layout to work with iOS26 Pull Request resolved: #53067 Test Plan: Tested locally with RNTester. | iOS Version | Before | After | | --- | --- | --- | | < iOS 26 | https://github.com/user-attachments/assets/91d73ea3-30ba-4a5c-948e-ea5c63aa7c6d | https://github.com/user-attachments/assets/76061bc8-0f14-412a-a8fb-d1c3951772e6 | | >= iOS 26 | https://github.com/user-attachments/assets/1abc477f-bc0a-4762-938e-98814fb2a054 | https://github.com/user-attachments/assets/77e562e1-b803-46ac-9cf6-102f062a1cd4 | Rollback Plan: Reviewed By: sammy-SC Differential Revision: D79653120 Pulled By: cipolleschi fbshipit-source-id: d99b353b7b7b5496b148779de4abe3e57dd38156
motiz88
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Aug 27, 2025
* Fix Switch layout with iOS26 (#53247) Summary: Pull Request resolved: #53247 Apple changed the sizes of the UISwitchComponent and now, if you build an iOs app using the <Switch> component, the layout of the app will be broken because of wrong layout measurements. This has been reported also by [https://github.com/facebook/react-native/issues/52823](https://github.com/facebook/react-native/issues/52823). The `<Switch>` component was using hardcoded values for its size. This change fixes the problem by: - Using codegen for interface only - Implementing a custom Sadow Node to ask the platform for the Switch measurements - Updating the JS layout to wrap the size around the native component. [iOS][Fixed] - Fix Switch layout to work with iOS26 Pull Request resolved: #53067 Test Plan: Tested locally with RNTester. | iOS Version | Before | After | | --- | --- | --- | | < iOS 26 | https://github.com/user-attachments/assets/91d73ea3-30ba-4a5c-948e-ea5c63aa7c6d | https://github.com/user-attachments/assets/76061bc8-0f14-412a-a8fb-d1c3951772e6 | | >= iOS 26 | https://github.com/user-attachments/assets/1abc477f-bc0a-4762-938e-98814fb2a054 | https://github.com/user-attachments/assets/77e562e1-b803-46ac-9cf6-102f062a1cd4 | Rollback Plan: Reviewed By: sammy-SC Differential Revision: D79653120 Pulled By: cipolleschi fbshipit-source-id: d99b353b7b7b5496b148779de4abe3e57dd38156 * feat: update js layout * fix crash for feature flag
This was referenced Oct 14, 2025
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Summary:
Apple changed the sizes of the UISwitchComponent and now, if you build an iOs app using the component, the layout of the app will be broken because of wrong layout measurements.
This has been reported also by #52823.
The
<Switch>component was using hardcoded values for its size.This change fixes the problem by:
Changelog:
[iOS][Fixed] - Fix Switch layout to work with iOS26
Test Plan:
Tested locally with RNTester.