The graphical elements of UIKit – what format are they?

问题

For standard interface elements of the Apple's UIKit, how do apple store them? Are they stored as cocca touch code, pdf, images or other?

Thanks Ross

回答1:

The graphics are stored in crushed PNG format in an 'artwork' file in UIKit.

In a more general sense they are, of course, not just graphics - but can be likened to images painted in touch-receptive boxes.

来源：https://stackoverflow.com/questions/2593972/the-graphical-elements-of-uikit-what-format-are-they