Spin rate of UIActivityIndicatorView

Question

What is the spin speed of a UIActivityIndicatorView? Specifically, how long does it take to complete one revolution?

UPDATE: the reason for asking this is that I want to create my own activity indicator spinner that's smaller than the normal one. But I can't change the size of the normal one, so I'm making my own via UIImageView's animation options. I want to be as close to the normal one in behavior, timing, feel, etc. as I can get.

@RobertHarvey Really? Don't tell me you knew that off the top of your head. — Undo, Apr 22 '13 at 23:04
@Undo: It's a guess. But I'm probably off by no more than about 25 percent. — Robert Harvey, Apr 22 '13 at 23:07
I wonder how many people read this and thought "I'm not sure why he wants to know that, but I am sure that whatever he's thinking of using it for is a bad idea." — HalR, Apr 23 '13 at 04:30
Find some custom implementations that others have made on cocoa controls / github and browse their source to see how they've done it. — Luke, Apr 23 '13 at 17:55
Hey, that's a good reason to know and a good thing to do! (Sorry for the smart-alecky comment before) — HalR, Apr 23 '13 at 18:00
Yep, that is a good reason. I'm not sure what I expected, but it wasn't a good UX. — Undo, Apr 23 '13 at 18:24

score 3 · Accepted Answer · answered Aug 15 '13 at 10:24

The spin rate of the UIActivityIndicatorView is 1.0 as of iOS 6.1.4. This number is an implementation detail and is not guaranteed to remain at this value for future versions of iOS. You can figure this out by accessing the first subview of a UIActivityIndicatorView, which is a UIImageView, and querying its animationDuration property. It looks like UIActivityIndicatorView uses an animated UIImageView under the hood.

Spin rate of UIActivityIndicatorView

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