ios - UIView scale animation overshoots when changed -

when animate change view's transform, reset change in animation before first animation finishes, everything's great (shown here rotation). animation smoothly switches new target:

but when scale, animation overshoots magnificently:

here's breaking code:

uiview.animatewithduration(1) {     self.someview.layer.transform = catransform3dmakescale(0.001, 0.001, 1) } uiview.animatewithduration(1,     delay: 0.5,     options: nil,     animations: {         self.someview.layer.transform = catransform3didentity     }, completion: nil ) 

has else seen this? doing wrong?

edit: , there workaround?

edit 2: believe duplicate of this question , voting close.

this blog post provides answer: in ios 8, uiview animations additive, , has unfortunate result scale animations.

basically, second animation happens together with first animation. solution explicitly remove original animation before starting new one:

view.layer.transform = view.layer.presentationlayer().transform view.layer.removeallanimations()