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

By far the easiest and most appropriate way to obtain a unique identifier is to use the mechanisms Apple explicitly provides for obtaining one - [[UIDevice currentDevice] uniqueIdentifier]. You can not guarantee that the phone number will be unique to the device or that the device will even have a phone number. Beyond that, doing so is a horrible idea as it is a definite invasion of the user's privacy. Even the uniqueidentifier should be hashed if you are going to store it in any way.