June 2015
Intermediate to advanced
100 pages
3h 29m
English
Content preview from Developing for Apple WatchBecome 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 we created. It’s a lot like other extensions on iOS—sharing, activity, photo editing, etc.—in that it’s basically a helper app that lives inside your main app. The WatchKit extension is responsible for all communication between your phone and the watch. This is important because of one simple fact: all of the code you write for your watch app is executed on your iPhone. Every line you write is running on the phone and then updating the UI on the watch. When your code calls setText on the WKInterfaceLabel instance, that UI update travels over the network ...
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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.