November 2013
Intermediate to advanced
576 pages
19h 3m
English
book
iOS Components and Frameworks: Understanding the Advanced Features of the iOS SDK
by Kyle Richter, Joe Keeley
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Gesture Recognizers: Under the Hood
Now that basic gesture recognizers have been demonstrated in action and the first issue has been encountered with them, it is a good time to walk through, in a little more detail, how gesture recognizers work.
The first thing to understand is that gesture recognizers operate outside the normal view responder chain. The UIWindow will send touch events to gesture recognizers first, and they must indicate that they cannot handle the event in order for touches to get forwarded to the view responder chain by default.
Next, it is important to understand the basic sequence of events that takes place when an app is trying to determine whether a gesture has been recognized:
The window will send touch events to gesture ...
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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.