Resigning Branded App (IOS).
Bake APS entitlements for Push Notifications
- Download the aps-entitlements-template.plist file that would be provided along with the build assets.
 - Open it and replace {TEAM_ID} and {BUNDLE_ID} with actual values
 - Save file as aps-entitlements.plist in the same folder as app.xcarchive
 - Run following command in the same folder
 
# Run this command to find the ID that you should use as {IDENTITY}
security find-identity -v -p codesigning
# Use that identity to sign the frameworks and files
codesign -f -s "{IDENTITY}" app.xcarchive/Products/Applications/App.app/Frameworks/*
codesign -f -s "{IDENTITY}" --entitlements ./aps-entitlements.plist
app.xcarchive/Products/Applications/App.app
Listed below are the options for on how to re-sign your app.
Sign via Xcode - Preferred
- 
Open the xcarchive - This should open in Xcode Archives (Window → Organizer → Archives)

 - 
Click Distribute App
 - 
Select App Store Connect and click Next
 - 
Select Export and click Next
 - 
Select your Development Team and click Next. The Development Team must be connected to your App Store account.
 - 
Wait while Xcode fetches information and signing certificates for the app. This may take a few minutes.
 - 
Check all of the options and click Next. If you receive errors in a later step, you can try turning off Include bitcode for iOS content, which optimizes the generated ipa and allows Apple to generate additional builds for each device architecture.

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Select Automatically manage signing and click Next
 - 
Wait while Xcode prepares the build. This may take a few minutes.
 - 
Click Export, provide a name and location, and click Export again.

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Open the export directory in Finder and you will see an App.ipa, and you can proceed with Uploading to the App Store.
 
Sign via iReSign
We can use a tool called iReSign to convert an xcarchive into a signed ipa. It is a much simpler process, however it isn’t as thorough or reliable as using Xcode Archives.
- 
Download and open iReSign
 - 
Select the xcarchive (or a signed ipa) and your signing certificate

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Click ReSign!
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You will now have a signed ipa beside the xcarchive, and you can proceed with Uploading to the App Store
 
Uploading to the App Store
- 
Install Transporter from the Mac OS App Store, open it, and sign into an account that has access to your App Store Connect account
 - 
Click Add App and select your signed ipa

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Click Deliver and wait for it to be uploaded.