ToffeeTracker | A WatchOS Swift UI Coffee Tracker with HealthKit Integration

The Coffee Tracker app declares constants that contain an identifier and a display name for each type of complication that the app supports. The system uses the identifiers to define the different types of complications. It shows the display names when the user scrolls through the complications while configuring a watch face. Then, the complication data source's getComplicationDescriptors(handler:) method creates a descriptor for each identifier. It starts by creating the descriptor for the Caffeine Dose complications. Here, the supportedFamilies parameter specifies that this complication is available for most (but not all) of the complication families. Next, it creates the Total Cups descriptor. This descriptor supports the same subset of families. Then, it creates the Both Caffeine and Cups descriptor. This descriptor supports the families that aren't already supported by the Caffeine Dose and Total Cups descriptors. Finally, the app passes the descriptors back to the getComplicationDescriptors(handler:) method's handler. While each descriptor doesn't need to cover all possible families, every family is covered by at least one descriptor. The complications appear in the same order as the descriptor array. When the user configures a complication, the picker shows the first three items from the array that support the complication’s family. If there are more than three, the picker displays a More button to provide access to the additional complications.