objective c - iOS Dismiss and Present view controller custom animation -

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i have view controller presenting following objective c code:

catransition *animation=[catransition animation]; animation.delegate=self; animation.duration=0.3; animation.type=kcatransitionmovein; animation.subtype=kcatransitionfromright;  [self presentviewcontroller:reader animated:no completion:nil]; [reader.view.layer addanimation:animation forkey:@"animation"];

and dismissing similar code inside delegate method

catransition *animation=[catransition animation]; animation.delegate=self; animation.duration=0.3; animation.type=kcatransitionmovein; animation.subtype=kcatransitionfromleft;  [self dismissviewcontrolleranimated:no completion:nil]; [self.view.layer addanimation:animation forkey:@"animation"];

however there 1 problem: unlike using navigation controller see 1 view slide onto other view; here old view disappears instantly new view moves onto blank view.

how fix problem? need code work in ios 6,7 , 8 , horizontal animation see when going , forth between views inside navigation controllers.

edit: solution accepted has bug ios 6, if can find solution fixes it, i'll edit post.

edit 2: found it. appears since presenting zbar view controller need use code

zbarcontroller.wantsfullscreenlayout=no;

after set cameraoverlayview.

presenting view controller using custom animation:

catransition* transition = [catransition animation]; transition.duration = 0.3; transition.type = kcatransitionmovein; transition.subtype = kcatransitionfromright; [self.navigationcontroller.view.layer addanimation:transition forkey:kcatransition]; [self.navigationcontroller pushviewcontroller:reader animated:no];

dismissing view controller using custom animation:

catransition* transition = [catransition animation]; transition.duration = 0.3; transition.type = kcatransitionreveal; transition.subtype = kcatransitionfromleft; [self.navigationcontroller.view.layer addanimation:transition forkey:kcatransition];     [self.navigationcontroller popviewcontrolleranimated:no];

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