Use different and cute ease-animations for buttons.

Swift | Objective-C

Ease animation, in other words, time interpolator, defines the rate of change of an animation. This allows animations to have non-linear motion, such as acceleration and deceleration. Check cubic-bezier to have some funs about ease animations.

In BMB, for each boom-button, there are 6 kinds of animations when booming or re-booming. You can set different eases for animations by names of supported eases, or customize your own ease.

1. Move animation when booming.

   bmb.boomMoveEaseName = Ease.inBack
   

   The default value is Ease.outBack

2. Rotate animation when booming.

   bmb.boomRotateEaseName = Ease.inBack
   

   The default value is Ease.outBack

3. Scale animation when booming.

   bmb.boomScaleEaseName = Ease.linear
   

   The default value is Ease.outBack

4. Move animation when re-booming.

   bmb.reboomMoveEaseName = Ease.inBack
   

   The default value is Ease.inBack

5. Rotate animation when re-booming.

   bmb.reboomRotateEaseName = Ease.inBack
   

   The default value is Ease.inBack

6. Scale animation when re-booming.

   bmb.reboomScaleEaseName = Ease.inBack
   

   The default value is Ease.inBack

You can change movement, scale and rotation animations’ ease name with a line of code:

bmb.boomEaseName = Ease.outCirc
bmb.reboomEaseName = Ease.outCirc

Or if you want a customized ease:

class CustomTimeInterpolator: TimeInterpolator {
    func interpolation(_ offset: CGFloat) -> CGFloat {
        return offset < 0.5 ? offset : min(offset * 1.5, 1)
    }
}
...
bmb.boomEase = CustomTimeInterpolator.init()

Check demo for more details.

There are 31 kinds of ease animations. Check the Ease file to try all the enums.