Developing for Apple Watch, 2nd Edition

Linking Content to the UI with Row Controllers

Looking at the interface object hierarchy in the storyboard’s Run Log interface controller (if you don’t see it, select Editor → Show Document Outline), you can see that your labels are nested inside a parent group, but that instead of the group being a child of the table (which would match how it appears in the interface editor), there’s an intermediate object that looks different, called Table Row Controller. This is the row controller we’ve been talking about, and it’s vital to understanding how tables work in WatchKit.

Row controllers are lightweight objects that sit between tables and row content. Their entire role is to ferry data from your interface controller to the interface objects you’ve ...