Debugging React Native IOS build issues

Errors and things one could try to resolve them

turn on lots of debugging output defaults write com.apple.CoreSimulator DebugLogging -bool YES

Error: many Fix: cd myapp && cd ios && pod deintegrate && pod cache clean --all && npm cache verify && yarn cache clean && pod install --repo-update && cd myapp && npm run ios

Error: **ERROR** Failed to apply patch for package react-native at path Fix: rm -rf node_modules && npm install

Error: :x: error: Multiple commands produce

brew tap facebook/fb
brew install idb-companion

Info: idb list-targets shows simulators

Simulators

xcrun simctl diagnose

xcrun simctl boot <simulator id>

https://developer.apple.com/download/all/

xcrun simctl runtime add "~Downloads/iOS_17_Simulator_Runtime.dmg"

xcodebuild -downloadPlatform iOS

Error: AppDelegate.h:1:9: 'RCTAppDelegate.h' file not found Fix: "EXCLUDED_ARCHS[sdk=iphonesimulator*]" = arm64; in 4 places

Error:

 :x:  ld: framework 'RNGestureHandler' not found
 :x:  clang: error: linker command failed with exit code 1 (use -v to see invocation)

Info: pod env

Info: pod spec lint [NAME.podspec]

Info: pod outdated

Info: available versions of a pod: https://api.github.com/repos/CocoaPods/Specs/contents/Specs/ObjectiveSugar

Info: An MM file is a source code file that can contain both Objective-C and Objective-C++ programming code. It is used on MacOS and differentiates from . M files that contains Objective-C code only.

Info: tree -f | grep .xcodeproj | grep -v ".xcodeproj/"

Info: npx react-native info

Error: AccessibilityResources.bundle" not found

# .xcode.env.local
-# This `.xcode.env` file is versioned and is used to source the environment
-# used when running script phases inside Xcode.
-# To customize your local environment, you can create an `.xcode.env.local`
-# file that is not versioned.
+set -e

-# NODE_BINARY variable contains the PATH to the node executable.
-#
-# Customize the NODE_BINARY variable here.
-# For example, to use nvm with brew, add the following line
-# . "$(brew --prefix nvm)/nvm.sh" --no-use
-export NODE_BINARY=$(command -v node)

sudo xcode-select -switch /Applications/Xcodex.14.3.app

Error: Errno::EEXIST - File exists @ syserr_fail2_in - /Users/me/Library/Caches/CocoaPods/Pods/External/hermes-engine/a4753531c473e6dd66fefa25b5cda1bf-47986/destroot/Library/Frameworks/universal/hermes.xcframework/ios-arm64_x86_64-maccatalyst/hermes.framework/Resources Happened during npx react-native@0.71.8 init NewRN --version 0.71.8 (making a new react project from scratch to try to compare to a malfunctioning project) Fix: idk man, consider not having two projects on one laptop, especially this laptop

Error: Build service could not create build operation: unknown error while handling message: MsgHandlingError(message: "unable to initiate PIF transfer session (operation in progress?)") (Suggested) Fix: restart computer

Debugging /Volumes/Macintosh\ HD/private/tmp see simulator IDs

XCode: Clean Build Folder

https://docs.proxyman.io/debug-devices/ios-simulator

Network debugging

https://proxyman.io/ios https://github.com/square/PonyDebugger

Resources