Developing for Apple Watch, 2nd Edition

Chapter 10Extending Complications with Time Travel

When you raise your wrist to look at your Apple Watch, you see the current state of all of your complications, a snapshot of the data you care about right now. This is a smart watch, though; shouldn’t you be able to do more? There is a feature that makes complications—and the apps that support them—even more useful in your daily life. With the watch face activated, turning the Digital Crown activates Time Travel, which lets you see the state of your complications forward or backward in time. This advanced feature of ClockKit is a great use of complications, because it makes more of your users’ data available at a moment’s notice. In this chapter, we’ll look at Time Travel, how to ...