ios - UINavigationController back button not animating -

i'm having weird issue navigation controller's button animation:

my app has tab bar control 3 tabs, 1 of them has navigation controller 2 subsequent view controllers, first 1 show master table , second 1 details, problem comes when tap button detail view controller, instead of slide master view controller pops view without animation.

i've noticed if first go tab, , return again one, animation trigger normally.

i've rebuilt whole app navigation scratch problem still persist, appreciated.

thanks in advance!.

edit: more info added

this how storyboard looks in particular branch:

here's prepareforsegue "partidos activos" view controller:

#pragma mark - segues  -(void)prepareforsegue:(uistoryboardsegue *)segue sender:(id)sender{     if ([segue.identifier isequaltostring:@"partidosendia"]) {         partidosactivosenfecha *paf = segue.destinationviewcontroller;         calendarcell *sendercell = (calendarcell *)sender;         paf.datos = sendercell.datadic;     } } 

both viewcontroller viewdidload methods calling super @ start of method.

as told before, if tap on other tab , come one, slide animation "partidos activos en fecha" viewcontroller works expected, it's when start application , go directly viewcontroller when slide animation doesn't work, , gets caller viewcontroller without animation.

hope added enough info, if not tell me , add again.

i found problem was, missing call super in viewdidappear method in uitabbarcontroller!, checking viewcontrollers tabs not tabbarviewcontroller, @rdelmar right ;).

thanks help!.