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Start surface after setting the delegate #33402

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danilobuerger
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Summary

When starting the surface, _propagateStageChange is called. This checks the delegate to call surface:didChangeStage: on it.

When initWithSurface:sizeMeasureMode: is called after start, then the delegate will be nil and thus not be called.

This turns it around so a delegate is present for the surface to propagate its state to.

This fixes RCTContentDidAppearNotification not getting posted otherwise.

Changelog

[iOS] [Fixed] - Post RCTContentDidAppearNotification with new arch

Test Plan

I found it best to set a breakpoint in XCode to where RCTContentDidAppearNotification is being posted.

Prior to the patch that breakpoint will not be called. After applying the patch, it will be called.

When starting the surface, _propagateStageChange is called. This checks the delegate to call surface:didChangeStage: on it.

When initWithSurface:sizeMeasureMode: is called after start, then the delegate will be nil and thus not be called.

This turns it around so a delegate is present for the surface to propagate its state to.

This fixes RCTContentDidAppearNotification not getting posted otherwise.
@facebook-github-bot facebook-github-bot added CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. Shared with Meta Applied via automation to indicate that an Issue or Pull Request has been shared with the team. labels Mar 9, 2022
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Platform Engine Arch Size (bytes) Diff
ios - universal n/a --

Base commit: 5386364
Branch: main

@react-native-bot react-native-bot added Bug Platform: iOS iOS applications. labels Mar 9, 2022
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Platform Engine Arch Size (bytes) Diff
android hermes arm64-v8a 8,214,074 +0
android hermes armeabi-v7a 7,799,789 +0
android hermes x86 8,587,551 +0
android hermes x86_64 8,538,498 +0
android jsc arm64-v8a 9,882,396 +0
android jsc armeabi-v7a 8,852,646 +0
android jsc x86 9,851,969 +0
android jsc x86_64 10,447,035 +0

Base commit: 5386364
Branch: main

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@ShikaSD has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

@danilobuerger
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@ShikaSD per your request I investigated the calls to _updateViews. Before and after the patch they end up with the same stage. See below for debug info.

Before the patch, on start: called with

  • _stage == RCTSurfaceStageRunning

Screenshot 2022-03-11 at 17 57 55

  • _stage == RCTSurfaceStageRunning

Screenshot 2022-03-11 at 17 58 00

After the patch, on start: called with

  • _stage == RCTSurfaceStagePreparing

Screenshot 2022-03-11 at 17 59 32

  • _stage == RCTSurfaceStageRunning

Screenshot 2022-03-11 at 17 59 36

  • _stage == RCTSurfaceStageRunning

Screenshot 2022-03-11 at 17 59 40

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This pull request was successfully merged by @danilobuerger in 75105e6.

When will my fix make it into a release? | Upcoming Releases

@react-native-bot react-native-bot added the Merged This PR has been merged. label Mar 12, 2022
@danilobuerger danilobuerger deleted the patch-6 branch March 12, 2022 16:51
cortinico pushed a commit to cortinico/react-native that referenced this pull request Mar 12, 2022
Summary:
When starting the surface, _propagateStageChange is called. This checks the delegate to call surface:didChangeStage: on it.

When initWithSurface:sizeMeasureMode: is called after start, then the delegate will be nil and thus not be called.

This turns it around so a delegate is present for the surface to propagate its state to.

This fixes RCTContentDidAppearNotification not getting posted otherwise.

## Changelog

[iOS] [Fixed] - Post RCTContentDidAppearNotification with new arch

Pull Request resolved: facebook#33402

Test Plan:
I found it best to set a breakpoint in XCode to where RCTContentDidAppearNotification is being posted.

Prior to the patch that breakpoint will not be called. After applying the patch, it will be called.

Reviewed By: philIip

Differential Revision: D34753329

Pulled By: ShikaSD

fbshipit-source-id: cc44a4c3a787d49e22e9d0c3a82c0f11ed281a0a
ShikaSD pushed a commit that referenced this pull request Mar 16, 2022
Summary:
When starting the surface, _propagateStageChange is called. This checks the delegate to call surface:didChangeStage: on it.

When initWithSurface:sizeMeasureMode: is called after start, then the delegate will be nil and thus not be called.

This turns it around so a delegate is present for the surface to propagate its state to.

This fixes RCTContentDidAppearNotification not getting posted otherwise.

## Changelog

[iOS] [Fixed] - Post RCTContentDidAppearNotification with new arch

Pull Request resolved: #33402

Test Plan:
I found it best to set a breakpoint in XCode to where RCTContentDidAppearNotification is being posted.

Prior to the patch that breakpoint will not be called. After applying the patch, it will be called.

Reviewed By: philIip

Differential Revision: D34753329

Pulled By: ShikaSD

fbshipit-source-id: cc44a4c3a787d49e22e9d0c3a82c0f11ed281a0a
Saadnajmi pushed a commit to Saadnajmi/react-native-macos that referenced this pull request Jan 15, 2023
Summary:
When starting the surface, _propagateStageChange is called. This checks the delegate to call surface:didChangeStage: on it.

When initWithSurface:sizeMeasureMode: is called after start, then the delegate will be nil and thus not be called.

This turns it around so a delegate is present for the surface to propagate its state to.

This fixes RCTContentDidAppearNotification not getting posted otherwise.

[iOS] [Fixed] - Post RCTContentDidAppearNotification with new arch

Pull Request resolved: facebook#33402

Test Plan:
I found it best to set a breakpoint in XCode to where RCTContentDidAppearNotification is being posted.

Prior to the patch that breakpoint will not be called. After applying the patch, it will be called.

Reviewed By: philIip

Differential Revision: D34753329

Pulled By: ShikaSD

fbshipit-source-id: cc44a4c3a787d49e22e9d0c3a82c0f11ed281a0a
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4 participants