Book Image

Apple Watch App Development

By : Steven F. Daniel
Book Image

Apple Watch App Development

By: Steven F. Daniel

Overview of this book

With the increasing amount of new wearable devices hitting the market, wearables are the next wave of mobile technology. With the release of Apple's WatchKit SDK, a whole new world of exciting development possibilities hasopened up. Apple Watch App Development introduces you to the architecture and limitations of the Apple Watch platform, followed by an in-depth look at how to work with Xcode playgrounds. Here, we'll introduce you to the Swift programming language so you can quickly begin developing apps for the Apple Watch platform with the WatchKit framework and the Xcode Development IDE. We then discuss more advanced topics such as Notifiations, Glances, Closures, Tuples, Protocols, Apple pay, and using Swift playgrounds, with each concept backed up with example code that demonstrates how to properly execute it. We also show you how to package and deploy your Watch application to the Apple AppStore. By the end of this book, you will have a good understanding of how to develop apps for Apple Watch platform using the WatchKit framework and Swift 2.0.
Table of Contents (19 chapters)
Apple Watch App Development
About the Author
About the Reviewer

Storing information to show within your glance controller

In this section, we will take a look at how we can use the NSStandardUserDefaults class to store the selected shopping list item when the user taps on a specific row within the WKInterfaceTable controller. This will then be displayed within the glance interface controller's WKInterfaceController class:

  1. Open the InterfaceController.swift file located within the ShoppingList WatchKit Extension group in the project navigation window.

  2. Next, locate the didSelectRowAtIndex method and enter the following highlighted code snippet:

    // MARK: WKInterfaceTable Delegate Callbacks
    // Handle when a row has been selected within our table
    override func table(table: WKInterfaceTable, didSelectRowAtIndex rowIndex: Int) {
       // Send the product to be charged by sending the product as 
       // a dictionary object,
       // and then converting it to a 'Product' type value in our 
       // application delegate.
       // We will then have our iOS app...