Best Practices with iOS and NativeScript

Delegates, delegates, DELEGATES!!

Always retain custom delegate implementations that you use in a your own custom iOS classes. Not doing so can cause your delegate to get garbage collected early and functionality not working as expected.

For example:

BAD

let applePayController: PKPaymentAuthorizationViewController

applePayController =
  PKPaymentAuthorizationViewController.alloc().initWithPaymentRequest(
    paymentRequest,
  )
applePayController.delegate =
  PKPaymentAuthorizationViewControllerDelegateImpl.initWithOwner(this)

GOOD

let applePayController: PKPaymentAuthorizationViewController
let applePayControllerDelegate: PKPaymentAuthorizationViewControllerDelegateImpl

applePayController =
  PKPaymentAuthorizationViewController.alloc().initWithPaymentRequest(
    paymentRequest,
  )
applePayControllerDelegate =
  PKPaymentAuthorizationViewControllerDelegateImpl.initWithOwner(this)
applePayController.delegate = applePayControllerDelegate

Delegates, delegates, DELEGATES!! ​

Contributors

Delegates, delegates, DELEGATES!!