Book Image

Building Apple Watch Projects

By : Stuart Grimshaw
Book Image

Building Apple Watch Projects

By: Stuart Grimshaw

Overview of this book

With Apple’s eagerly anticipated entry into the wearable arena, the field is wide open for a new era of app development. The Apple Watch is one of the most important technologies of our time. This easy-to-understand book takes beginners on a delightful journey of discovering the features available to the developer, right up to the completion of medium-level projects ready for App Store submission. It provides the fastest way to develop real-world apps for the Apple Watch by teaching you the concepts of Watch UI, visual haptic and audio, message and data exchange between watch and phone, Web communication, and finally Visual, haptic as well as audio feedback for users. By the end of this book, you will have developed at least four fully functioning apps for deployment on watchOS 2.
Table of Contents (17 chapters)
Building Apple Watch Projects
About the Author
About the Reviewer

Adding some animation magic

We all know, as developers, the pain of finding that an idea that we had thought simple and quick to implement turns out to be much harder than we had imagined. But when programming with WatchKit, you will often find that some quite advanced-sounding technologies are, in fact, extremely easy to use.

WKInterfaceController animation methods are just that, and so we can add some flair to our app by changing the color of the button border – which is to say, the BorderGroup background color - using a call to animateWithDuration.

First, let's add some code to our InterfaceController class, and then we will take a look at what we have done.

  1. Control-drag from the Group in the Document Outline to the code in the assistant editor, to create an Outlet connection:

  2. Enter the name borderGroup as shown, and hit Connect.

    Xcode creates a new IBOutlet (connection) between the interface and the source code:

    @IBOutlet var borderGroup: WKInterfaceGroup!
  3. Next, below the HelloButtonTapped...