February 2014
Intermediate to advanced
560 pages
18h 58m
English
Content preview from iOS Programming: The Big Nerd Ranch Guide
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For the More Curious: Retina Display
With the release of iPhone 4, Apple introduced the Retina display for the iPhone and iPod touch. The Retina display has much higher resolution – 640x1136 pixels (on a 4-inch display) and 640x960 pixels (on a 3.5-inch display) compared to 320x480 pixels on earlier devices. Let’s look at what you should do to make graphics look their best on both displays.
For vector graphics, like BNRHypnosisView’s drawRect: method and drawn text, you do not need to do anything; the same code will render as crisply as the device allows. However, if you draw using Core Graphics functions, these graphics will appear differently on different devices. In Core Graphics, also called Quartz, lines, curves, text, etc. are ...
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