May 2016
Intermediate to advanced
200 pages
6h 43m
English
Content preview from Developing for Apple Watch, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The iPhone App--WatchKit Extension Relationship
I know what you’re thinking. That was a lot of setup for a little “Hello, World!” app. Why so complicated? The reason lies in that WatchKit extension you created. It’s a lot like other extensions on iOS—sharing, activity, photo editing, and the like—in that it’s basically a tiny app that lives inside your main iPhone app. Unlike the other app extensions, the WatchKit app doesn’t run on your phone. In fact, it’s not even compiled against the iOS SDK. Instead, it’s copied to the watch when you install the watch app, and it’s run on the watch. Instead of iOS, it’s built for watchOS. The WatchKit extension is responsible for all communication between your phone and the watch, but it doesn’t manage ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.