March 2014
Intermediate to advanced
672 pages
40h 11m
English
Content preview from The Core iOS Developer’s Cookbook, Fifth 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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Using UIActivityIndicatorView
UIActivityIndicatorView instances offer lightweight views that display a standard rotating progress wheel. The key word to keep in mind when working with these views is small. All activity indicators are tiny and do not look right when zoomed past their natural size.
iOS offers several different styles of the UIActivityIndicatorView class. UIActivityIndicatorViewStyleWhite and UIActivityIndicatorViewStyleGray are 20-by-20 points in size. The white version looks best against a black background, and the gray looks best against white. It’s a thin, sharp style. UIActivityIndicatorViewStyleWhiteLarge is meant for use on dark backgrounds. It provides the largest, clearest indicator, at 37-by-37 points in size:
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