IDTech iOS Framework Guide  1.1.088
API reference for UniPay
Call the Singleton instance of the IDTechEMV framework object:

To use a device, a Singleton instance has been established in the IDTechEMV 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_UniPay sharedController].delegate = self;
[IDTechEMV sharedController].delegate = self;
}