Brings back the unique identifier support under iOS 5, it uses the device's mac address in combination with the bundle identifier to generate a new hashed unique identifier.
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UIDeviceAddition added global unique identifier for tracking between different apps Aug 22, 2011


** NOTE: this is not going to work under iOS 7 **


Apple stopped supporting a unique identifier for iOS. This source code solves the problem. It generates a unique identifier based on the mac address of the device in combination with the bundle identifier.

What you need to do:

  • copy NSString+MD5Addition and UIDevice+IdentifierAddition to your project.

  • if your are using ARC in your project, you have to add the -fno-objc-arc flag to both files. Apple ARC Guidelines

  • use [[UIDevice currentDevice] uniqueDeviceIdentifier] to retrieve the unique identifier (it's a hash of your Bundle ID + MAC address)

  • use [[UIDevice currentDevice] uniqueGlobalDeviceIdentifier] to retrieve a global unique identifier (it's a hash of the MAC address, used for tracking between different apps).

  • have fun and follow gekitz ;)

//Thanks to Erica Sadun for her UIDevice+Hardware Addition (used for the mac address retrieval).


see license file.