Book Image

Apple Pay Essentials

By : Ernest Bruce
Book Image

Apple Pay Essentials

By: Ernest Bruce

Overview of this book

Apple Pay, one of the most talked about offerings of the latest iOS 9 release, is a digital wallet and electronic payment system developed by Apple Inc. Paying in stores or within apps has never been easier or safer. Gone are the days of searching for your wallet, and the wasted moments finding the right card! Now you can use your credit cards and rewards cards with just a touch. It allows payment to merchants, using Near field Communication (NFC), and within iOS apps. Implementing Apple Pay within apps for payment is a bit tricky, but our book solves this problem for you. Whether you are a brand new iOS app developer or a seasoned expert, this book arms you with necessary skills to successfully implement Apple Pay in your online-payment workflow. Whether you are a brand new iOS app developer or a seasoned expert, this book arms you with the necessary skills to successfully implement Apple Pay. We start off by teaching you how to obtain the certificates necessary to encrypt customers’ payment information. We will use Xcode and Objective C for the interface and Node.js for server side code. You will then learn how to determine whether the customer can use Apple Pay, and how to create payment requests. You will come to grips with designing a payment-processor program to interact with the payment gateway. Finally, we take a look at a business-focused view of Apple Pay protocols and classes. By the end of this book, you will be able to build a fully functional Apple Pay-integrated iOS app
Table of Contents (13 chapters)

Responding to user interactions with the payment sheet

After identifying the main actors and operations involved in the payment authorization workflow and with a single method to compute payment summary items, we are ready to delve into your responses to payment sheet messages initiated by the changes the user makes to shipping information.

Note that the correct functionality of the payment sheet is essential to the payment authorization workflow; in particular, the payment sheet must call its delegate methods consistently so that you can correctly gauge when these methods are called as a result of user interaction with the payment sheet. If you use iOS simulators to test your code and notice that the payment sheet delegate methods are not being called, quit and restart the Simulator app.

User changes shipping information

When the user changes the shipping address or contact, your payment sheet delegate receives the paymentAuthorizationViewController:didSelectShippingContact:completion: message...