ios - 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 因任何原因被关闭时，Apple Pay 都会调用以下委托(delegate)。有什么方法可以检测只是 Cancel 按钮被触摸了吗？

- (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.

如果

paymentAuthorizationViewController:didAuthorizePayment:completion:

不是先被调用，然后用户点击取消按钮(否则 Controller 以某种方式被取消)。