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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24Blocks and Categories
In iOS 4.0, a language-level feature called blocks was made available. A block is a set of instructions that can be passed around as a variable and called like a function. Blocks provide conveniences for a programmer and performance boosts for applications. If you are familiar with other high-level languages, you may know blocks as closures or anonymous functions. This chapter will briefly cover blocks and some of the common ways to use them. This chapter will also cover an Objective-C language feature called categories.
Colorizing TouchDrawView
Earlier, you wrote an application called TouchTracker that allowed the user to paint black lines on a white canvas. In this exercise, you will add functionality that will change ...
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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.