模仿 UIAlertView 反弹?

Mimic UIAlertView Bounce?(模仿 UIAlertView 反弹?)

问题描述

Whats the best way to mimic the bouncing animation from the UIAlertView on the iPhone? Is there some built-in mechanism for this? The UIAlertView itself won't work for my needs.

I looked into animation curves but from what I can tell the only ones they provide are easeIn, easeOut, and linear.

You can use 2 animations, one to pop up to very large, and the other one to rescale back to normal size.

(This is the approach use by UIAlertView internally.)

Alternatively, you can use the lower-level CAAnimation and use +[CAMediaTimingFunction functionWithControlPoints::::] to make your own curve.

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