Deprecated Xcode issues

Question

im getting errors and warnings with the following code:

1. Warning undeclared selector uniqueIdentifier at the first if statement;
2. Error Property uniqueIdentifier not found on object of type UIDevice
3. Error Cast of C pointer type CFStringRef

// Get the users Device Model, Display Name, Unique ID, Token & Version Number

UIDevice *dev = [UIDevice currentDevice];
NSString *deviceUuid;
if ([dev respondsToSelector:@selector(uniqueIdentifier)]) // Warning #1
    deviceUuid = dev.uniqueIdentifier; // Error #1
else {
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    id uuid = [defaults objectForKey:@"deviceUuid"];
    if (uuid)
        deviceUuid = (NSString *)uuid;
    else {
        CFStringRef cfUuid = CFUUIDCreateString(NULL, CFUUIDCreate(NULL));
        deviceUuid = (NSString *)cfUuid; // Error #2
        CFRelease(cfUuid);
        [defaults setObject:deviceUuid forKey:@"deviceUuid"];
    }
}

Answer 1

UIDevice uniqueIdentifier property is deprecated in iOS 5 and above

    udid = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
    NSLog(@"UDID : %@", udid);

Answer 2

1. You must create a method with name uniqueIdentifier
2. UIDevice does not have a property called uniqueIdentifier. See this answer.
3. Look at this answer.