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

Getting user input

So far, we have had very little input from the user. She has launched the app and pressed a button, but the Watch is good for more than just presenting information. While the size of the screen makes some forms of input impractical, and text input via a keyboard must be top of that list, there are still many user input methods, both old and new at our disposal.

WatchKit's text input controller is a very simple way to gather text input (as the name might suggest) using the presentTextInputControllerWithSuggestions method provided by WKInterfaceController. When making this method call, you provide a list of text options from which the user may make a selection (she may also cancel, or choose voice input).

Firstly, we want to modify changeBorderColor() to accept a String argument which will tell it what color the user has selected. Replace the function as it stands with the following:

    func changeBorderColor(colorString: String) {
        let newColor: UIColor