From ecb9c582e62fc2d9b97ae6adc6241a36f0517a37 Mon Sep 17 00:00:00 2001
From: Alex Toudic <alextoudic@proton.me>
Date: Tue, 24 Dec 2024 06:56:55 -0800
Subject: [PATCH] Fix applicationDidEnterBackground not being called (#48376)

Summary:
I noticed that `AppDelegate` subscribers listening for `applicationDidEnterBackground` events in Expo projects (as documented [here](https://github.com/expo/expo/blob/238b6f57e459dd2c0b13ee158f0af709fe922460/docs/pages/modules/appdelegate-subscribers.mdx?plain=1#L56) aren't working as expected anymore.
While investigating, I discovered that the events aren't reaching the `ExpoAppDelegate` implementation ([source](https://github.com/expo/expo/blob/71f2c55ff3f11e43ab43761bb5cece2e48eae0bf/packages/expo-modules-core/ios/AppDelegates/ExpoAppDelegate.swift#L61)) because the `RCTAppDelegate` implementation of `applicationDidEnterBackground` interrupts the event chain. This appears to be affecting some legitimate use cases.
I believe we could improve this by removing the current implementation, but I'd love to hear your thoughts on this approach. I might be missing some context about why this implementation was originally needed, so any insights would be greatly appreciated!

## Changelog:

<!-- Help reviewers and the release process by writing your own changelog entry.

Pick one each for the category and type tags:

[IOS] [FIXED] - Fix applicationDidEnterBackground not being called

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https://reactnative.dev/contributing/changelogs-in-pull-requests
-->
[IOS] [FIXED] - Fix applicationDidEnterBackground not being called

Pull Request resolved: https://github.com/facebook/react-native/pull/48376

Test Plan: Ran a local test after change

Reviewed By: javache

Differential Revision: D67621557

Pulled By: cipolleschi

fbshipit-source-id: 2d73711372deba867bd616c79ef4d00c79aa86d5
---
 .../react-native/Libraries/AppDelegate/RCTAppDelegate.mm     | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm b/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm
index 46b800cce9d..31b888911aa 100644
--- a/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm
+++ b/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm
@@ -81,11 +81,6 @@
   [_window makeKeyAndVisible];
 }
 
-- (void)applicationDidEnterBackground:(UIApplication *)application
-{
-  // Noop
-}
-
 - (NSURL *)sourceURLForBridge:(RCTBridge *)bridge
 {
   [NSException raise:@"RCTBridgeDelegate::sourceURLForBridge not implemented"