有什么方法可以检测它何时触及 Apple Pay PKPaymentAuthorizationViewController 上的取消按钮？

Question

每当 PKPaymentAuthorizationViewController 因任何原因被解雇时，Apple Pay 都会调用以下委托。有没有什么方法可以检测是否只是 取消 按钮被触摸了？

- (void)paymentAuthorizationViewControllerDidFinish:(PKPaymentAuthorizationViewController *)controller
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

Answer 1

来自documentation for paymentAuthorizationViewControllerDidFinish：

When the user authorizes a payment request, this method is called after the status from the paymentAuthorizationViewController:didAuthorizePayment:completion: method’s completion block has been shown to the user. When the user cancels without authorizing the payment request, only paymentAuthorizationViewControllerDidFinish: is called.

所以如果

paymentAuthorizationViewController:didAuthorizePayment:completion:

不是先被调用，然后用户点击取消按钮（否则控制器以某种方式被取消）。