Non constant speed when move by a CardinalSpline

Hi all.
I want to move an object by a spline with a constant speed, but when I use cc.CardinalSplineTo I get the object accelerated on straight regions of the spline and slowed on curved regions. The object also slows at the end of the spline. I understand that this is a problem of cc.cardinalSplineAt function’s algorithm, but maybe someone has encountered that problem and has some solution for this?

Thanks.

hi, I met the same problem. How did you solve it, finally?