Is the iPhone Simulator UDID unique for each installed instance?

Question

i.e. does this call:

NSString *udid = [UIDevice currentDevice].uniqueIdentifier;

return always the same UDID when it is executed on the iPhone

Answer 1

The UDID of the simulator is actually the same as the UDID of your Mac. You can easily verify this by looking at the System Profiler utility (where it is called the Hardware UUID).

On iPhones, iPads and iPod Touches, it is 40 lowercase hex digits, probably a SHA1 hash of some hardware identifier.