Developing for Apple Watch

Linking Interfaces in Your Storyboard

There are several ways to go from one interface controller to another. We’ll see them as the chapter goes on, but one thing to note right away is that whether you’re performing the transition in code or linking it up in Interface Builder, every interface controller must have its user interface laid out in your storyboard file. Unlike your iPhone app, where you can create view objects from code, from a storyboard, or from an xib, every single UI element needs to exist in your storyboard before it’s referenced.

Another departure from UIKit on iPhone is that WatchKit includes a built-in way to pass context from one interface controller to another. The context you pass can be model objects, raw data, or nothing ...