How to change port on RN 61 for IOS?

Description

Ok, I know that, in the official docs it says I have to use the port parameter.

But it also says that for IOS:

[…] update occurrences of 8081 to your chosen port in the node_modules/react-native/React/React.xcodeproj/project.pbxproj file

The problem is that here it says RN 60 removes “React.xcodeproj”.

My question is, then: What is the new way of changing ports, whitout React.xcodeproj?

I’m running bundler and react-native run-ios with --port=9000 but, of course, I’m getting this error:

An error was encountered processing the command (domain=NSPOSIXErrorDomain, code=2): Failed to install the requested application An application bundle was not found at the provided path.

Because somewhere, port :8081 is still hardcoded.

And no I can’t just kill what’s on port 8081. This is a corporate computer that has McAffee running on 8081 and this process won’t shut down 😦

React Native version:

“react”: “16.9.0”, “react-native”: “0.61.2”

macOS Catalina 10.15.7 Xcode 11.5

Steps To Reproduce

Provide a detailed list of steps that reproduce the issue.

1. react-native start --port=9000
2. react-native run-ios --port 9000

Expected Results

An error was encountered processing the command (domain=NSPOSIXErrorDomain, code=2): Failed to install the requested application An application bundle was not found at the provided path. Provide a valid path to the desired application bundle. Print: Entry, ":CFBundleIdentifier", Does Not Exist error Command failed: /usr/libexec/PlistBuddy -c Print:CFBundleIdentifier Print: Entry, ":CFBundleIdentifier", Does Not Exist

[leepowellnbs]

I have a temp fix (I’m not a Ruby dev so there’s probably a better way of doing this):

1. Update Podfile to

post_install do |installer|
    react_native_post_install(installer)
    __apply_Xcode_12_5_M1_post_install_workaround(installer)

    # Port fix
    installer.pods_project.build_configurations.each do |config|
      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'].insert(0, "RCT_METRO_PORT=${RCT_METRO_PORT}")
    end
end

1. Run pod install again

[pachuka]

@safaiyeh - This isn’t working for me on react-native 0.64.0. via the --port=8082 flag specifically for the ios build.

react-native start --port=8082  // bundler appears to properly start on port 8082
react-native run-ios --port=8082  // doesn't work
react-native run-android --port=8082 // works fine

Looks like the issue for iOS stems from RCTDefines.h in node_modules/react-native/React/Base/RCTDefines.h

If I update the port here to 8082 then run the ios command, then things work properly on the custom port, but that kind of defeats the purpose of having the cli argument if we still need to manually edit files to get it to work.