ios - Interactive transition similar to scroll view -

i have implemented interactive transition between 2 view controllers, using gesture recognizer , uipercentdriveninteractivetransition. doing custom swipe transition.

i improve 2 things in order have similar scrollview animation:

1. responsiveness. when pan super fast , short, next vc not showed, plus bug comes in (animationended not called, story) there way preload next view controller, have child view controller may be? seems doing work in viewdidload.

2. in implementation when gesture recognizer ends, call finishinteractivetransition. works ok, if start new pan gesture before transition completed ui jumps instead of smoothly scrolling. may should call finishinteractivetransition after delay, , calling manually updateinteractivetransition in mean time?

may can use api sets have interactive animation (but scrollview not option)?

just fyi: here view hierarchy during interactive swipe, gesture attached navigation view:

try subclassing uipercentdriveninteractivetransition , implement these methods. should smoothen out jerks:

- (void)startinteractivetransition:(id<uiviewcontrollercontexttransitioning>)transitioncontext {     [super startinteractivetransition:transitioncontext];     self.layer = transitioncontext.containerview.layer; }  - (void)finishinteractivetransition {     [super finishinteractivetransition];     self.layer.speed = 1;     self.layer.begintime = [self.layer converttime:cacurrentmediatime() fromlayer:nil] - self.layer.timeoffset; }  - (void)cancelinteractivetransition {     [super cancelinteractivetransition];     self.layer.speed = -1;     self.layer.begintime = cacurrentmediatime(); }