WatchKit beta 2 was just released as a part of the iOS 8.2 developer seed. One of the best new additions to the SDK is the ability to communicate back to the iOS parent app from the WatchKit extension. This allows us to essentially “close the loop” and pass information from the watch to the watch extension and to the iOS parent app that supports it.
I created a simple counter app for the watch which saves its count values back to a simple iOS table view app when the user hits a Save button. This tutorial will demonstrate how to transfer data to the parent iOS app from the watch extension. See the finished project on GitHub.
Original Youtube video here: IPhone How-to Guide