STPPaymentCardTextFieldDelegate

Called when either the card number, expiration, or CVC changes. At this point, one can call isValid on the text field to determine, for example, whether or not to enable a button to submit the form. Example:

• (void)paymentCardTextFieldDidChange:(STPPaymentCardTextField *)textField { self.paymentButton.enabled = textField.isValid; }

Called when editing begins in the text field as a whole. After receiving this callback, you will always also receive a callback for which specific subfield of the view began editing.

Notification that the user pressed the return key after completely filling out the STPPaymentCardTextField with data that passes validation. The Stripe SDK is going to resignFirstResponder on the STPPaymentCardTextField to dismiss the keyboard after this delegate method returns, however if your app wants to do something more (ex: move first responder to another field), this is a good opportunity to do that. This is delivered before the corresponding paymentCardTextFieldDidEndEditing:

Called when editing ends in the text field as a whole. This callback is always preceded by an callback for which specific subfield of the view ended its editing.

Called when editing begins in the payment card field’s number field.

Called when editing ends in the payment card field’s number field.

Called when editing begins in the payment card field’s CVC field.

Called when editing ends in the payment card field’s CVC field.

Called when editing begins in the payment card field’s expiration field.

Called when editing ends in the payment card field’s expiration field.

Called when editing begins in the payment card field’s ZIP/postal code field.

Called when editing ends in the payment card field’s ZIP/postal code field.