How to create a GUID/UUID using the iPhone SDK（如何获取一个设备的UUID）

Swift获取方法：

// 获取账户UUID的方法
        let uuid: String = NSUUID().UUIDString
        print("uuid: \(uuid)")```

OC:

• (NSString *)GetUUID{ CFUUIDRef theUUID = CFUUIDCreate(NULL); CFStringRef string = CFUUIDCreateString(NULL, theUUID); CFRelease(theUUID);
  return (__bridge NSString *)string;}```

In iOS 6 you can easily use:

NSUUID *UUID = [NSUUID UUID];
NSString* stringUUID = [UUID UUIDString];```