June 2011
Intermediate to advanced
590 pages
19h 31m
English
Content preview from iOS Programming: The Big Nerd Ranch Guide, Second 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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Making Connections
When the Quiz application loads its interface from MainWindow.xib, the objects that make up the interface are floating around in memory. The QuizAppDelegate (a controller object) needs to know where the labels (view objects) are in memory so that it can tell them what to display. The buttons (view objects that the user interacts with) need to know where the QuizAppDelegate is so that they can report when they are tapped. Your objects need connections. A connection lets an object know where another object is in memory.
Figure 1.14 shows the connections for Quiz. Some have already been made by the template (between the window outlet of QuizAppDelegate and the UIWindow instance, for example), and some were made implicitly (dragging ...
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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.