ios - Resigning Modal View with 2 different segues -

currently have uibarbutton says done in viewcontroller 2. present viewcontroller2 viewcontroller 1 modally through segue defined in storyboard. have viewcontroller3 presents viewcontroller2 modally well.

the question: how can define 2 different segues resign viewcontroller2 modally either vc1 or vc3?

after further research, seems defining unwindtoviewcontroller in vc1 , vc3 best way go. however, there way call ibaction before modal view unwinds?

@implementation redviewcontroller  - (ibaction)unwindtored:(uistoryboardsegue *)unwindsegue { }  @end 

modalview .m

-(ibaction)actionbeforeunwinding:(id)sender { } 

why not dismissing presentingviewcontroller?

- (ibaction)unwindtored:(id)sender {     [self.presentingviewcontroller dismissviewcontrolleranimated:yes completion:nil]; }