ios - UIView spring animations and UIPercentDrivenInteractiveTransition -


i'm trying write interactive animations between 2 view controllers involves pinching in collection view cell (interactively) reveal next view controller. when implemented without interactive animations, looked great spring animations: 

[uiview animatewithduration:delay:usingspringwithdamping:initialspringvelocity:options:animations:completion:]

however, after adding in interactive logic uipercentdriveninteractivetransition , uipinchgesturerecognizer, realized spring animation call doesn't work well. if pinch halfway , let go, jumps last keyframe of animation, , doesn't give me smooth animation got when using normal [uiview animatewithduration:] call.

any ideas?


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