Unique identifier for an iPhone app

Question

For an iPhone app that submits images to a server I need somehow to tie all the images from a particular phone together. With every submit I\'d like to send some unique pho

Answer 1

Interestingly, Apple has since deprecated the uniqueIdentifier in iOS 5 (as gN0Me mentioned). Here's the relevant TechCrunch article: http://techcrunch.com/2011/08/19/apple-ios-5-phasing-out-udid/

Apple suggests that you no longer uniquely identify the device but instead identify the user. In most cases, this is excellent advice though there are some situations which still require a globally unique device ID. These scenarios are quite common in advertising. Hence, I wrote an extremely simple drop-in library which replicates the existing behavior exactly.

In a shameless plug of self promotion, I'll link it here in the hope that someone finds it useful. Also, I welcome all and any feedback/criticism: http://www.binpress.com/app/myid/591

Nevertheless, in your particular situation I would advise skipping the globally unique ID functionality my library provides as it's a bit overkill for your situation. Instead, I would generate a simple CFUUID and store it in NSUserDefaults. This ID would be specific to your application but would allow you to group all the photos for that "app install" in your database.

In other words, by deprecating the uniqueIdentifier method, Apple is suggesting that you don't identify per device but instead per app install. Unless you are operating under specific conditions, chances are the per app ID fits your product better anyway.