SKInterpolationMode.step
Values between two keyframes are not interpolated. Instead, the value is that of the most recent keyframe.
Declaration
case stepDiscussion
Given a sequence with the key values of [5, 1, 10, 0] and times of [0, 0.25, 0.5, 1], step interpolation produces a set of values that follow a series of steps between each keyframe.
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