June 2011
Intermediate to advanced
590 pages
19h 31m
English
Content preview from iOS Programming: The Big Nerd Ranch Guide, Second Edition
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Application Icons
Once the Quiz application is installed on your development device, return to the device’s Home screen, and you’ll see that its icon is a plain white tile. Let’s give Quiz a better icon.
An application icon is a simple image that represents the application on the iOS desktop. Different devices require different sizes icons, and these requirements are shown in Table 1.1.
Table 1.1. Application icon sizes by device
| Device | Application icon size |
|---|---|
| iPhone/iPod touch without Retina display | 57x57 pixels |
| iPhone/iPod touch with Retina display | 114x114 pixels |
| iPad | 72x72 pixels |
If you supply a single application icon image at 57x57 pixels, that image will be scaled up on devices where a larger icon is needed. This is never good. A scaled-up icon ...
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