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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Adding Lifecycle Methods
The lifecycle methods of WKExtensionDelegate and UIApplication (on iOS) protocols are similar, though they are fewer. The most common one to implement is applicationDidFinishLaunching, allowing you to do setup when the app is launched. The other two have you covered when the app is interrupted—for example, if the user gets a call in the middle of a run. First, applicationWillResignActive will be called on your delegate, allowing you to save your work, and then applicationDidBecomeActive lets you restore it once the app is back in the foreground.
The WatchKit extension lifecycle methods are shown here in the context of launching a WatchKit app. You see the state of the app from before it’s launched to when it’s running ...
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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.