UUID in iOS

// Get UUID value
NSUUID  *uuid = [NSUUID UUID];

// Convert UUID to string and output result
NSLog(@"UUID: %@", [uuid UUIDString]);


-----------------------------------------------------


CFUUIDRef uuid = CFUUIDCreate(NULL);
CFStringRef identifier = CFUUIDCreateString(NULL, uuid);
CFRelease(uuid);

NSString *uuidString = CFBridgingRelease(identifier);


-----------------------------------------------------