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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Using the Debugger
When an application is launched from Xcode, the debugger is attached to that application. The debugger monitors the current state of the application, like what method it is currently executing and the values of the variables that are accessible from that method. Using the debugger can help you understand what an application is actually doing, which, in turn, helps you find and fix bugs.
One way to use the debugger is to set a breakpoint. Setting a breakpoint on a line of code pauses the execution of the application at that line (before it executes). This is useful when your application is not doing what you expected and you need to look at what is really happening.
In WhereamiAppDelegate.m, find the first line of code in ...
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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.