IDTech iOS/OSX SDK Guide  1.1.068
API reference for UniPay III
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Call the Singleton instance of the IDT_UniPayIII framework object:

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

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
// Insert code here to initialize your application
[[IDT_UniPayIII sharedController] setDelegate:self];
}