Applying speed and number of rotations for CABasicAnimation

I am trying to mimic the rotation of the bottle in Spin the Coke app and pie-chart in the Roambie App. . I wanted to rotate a view as per the touches and swipes of the user on that view.

What I currently do it:

1. Get the time when a touch Began and ended. (and swipe)
2. G开发者_如何学编程et all the coordinates of the touch or swipe and find the total distance.

I believe that the spin the coke app animates the bottles based on the distance and time taken for the swipe or touch. But I am not sure how they could have done.

I wanted the view to rotate faster initially, then slowdown and stop finally.

Please share your thoughts on how this problem could be solved?

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Take a look at keyframe animation: you have to build your animation manually but you can achieve any result you want.