IDTech iOS/OSX SDK Guide  1.1.084
API reference for UniPay 1.5
Call the Singleton instance of the IDT_UniPayI_V framework object:

A Singleton instance has been established in the IDT_UniPayI_V class. To utilize the delegate protocols, best practices would be initialize the connection by setting the delegate with the singleton instance.

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[[IDT_UniPayI_V sharedController] setDelegate:self];
}