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
Content preview from iOS Components and Frameworks: Understanding the Advanced Features of the iOS SDK
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Enumerating Asset Groups and Assets
A common design pattern when dealing with ALAssetsLibrary is enumeration. Because the user’s permission is required to access asset groups and assets, you typically need to enumerate the groups and assets to put them in a data structure to use in your user interface. The sample app will enumerate the groups on the device first to gather information about them to present in ICFAssetLibraryViewController. To do this, create an instance of ALAssetsLibrary, and then call the method to enumerate groups.
ALAssetsLibrary *al =[[[ALAssetsLibrary alloc] init] autorelease];...[al enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:enumerateAssetGroupsBlock ...
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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.
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