IDTech iOS/OSX SDK Guide  1.1.084
API reference for UniPay 1.5
Allocate/Initialize IDT_UniPayI_V Object

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

override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}