Developing for Apple Watch, 2nd Edition

Chapter 9Creating Complications with ClockKit

You’ve learned a lot so far about making apps for the Apple Watch. These apps are great, but given that the Apple Watch is, well, a watch, aren’t there some watch-specific things we can do in our apps? The answer is an absolute yes. Many of the watch faces available on Apple Watch support complications, which are small pieces of data that appear on the watch face. The term complication is borrowed from the traditional watchmaking world. A diver’s watch, for instance, might feature a depth meter in addition to displaying the time. This depth meter is a complication. On Apple Watch, complications are extremely powerful, delivering bite-sized pieces of information to our users whenever they so ...