Update 12/23/14: Series updated for Xcode 6.1.1
Update: As a user on the forums has noticed the color tint animation does not kick in without specifying a “fromValue” for the tint animation. Just update tintBackgroundColor(…) to include:
tint.fromValue = layer.backgroundColor.
Your challenge in this tutorial is to create a method to animate the login button’s corner radius. See the Challenge PDF for full details!
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