ios - Popping UIViewController causes previous UIViewControllers View to change position -


i have uinavigationcontroller uiviewcontroller set it's rootcontroller, contains background on uiview using image set under navbar. push onto navigation controller new uiviewcontroller , when button pushed, previous controller looks different. using visual debugger can see self.view has moved entirely down below navbar @ top. have no idea , been racking brains why might happening before navigation stack push

enter image description here

-(void)pushiphonemessagingcontactscontroller:(messagecontactsviewcontroller *)contactscontroller{     self.selectorview.hidden = yes;     [self.navigationcontroller pushviewcontroller:contactscontroller animated:yes]; }

on rootviewcontroller (iphonemessagingnotificationscontroller)

-(void)viewwillappear:(bool)animated{     self.selectorview.hidden = no;     [[[self navigationitem] leftbarbuttonitem] settintcolor:[uicolor blackcolor]];     [[uiapplication sharedapplication]      setstatusbarstyle:uistatusbarstyledefault];      if ([_displaytype intvalue] == messages_showing) {         [self.notificationsviewcontroller.view removefromsuperview];         [self.contentview addsubview:_messagesviewcontroller.view];     } else {         [self.messagesviewcontroller.view removefromsuperview];         [self.contentview addsubview:_notificationsviewcontroller.view];     }  }

it seems offending line in viewwillappear method of pushed uiviewcontroller

self.navigationcontroller.navigationbar.translucent = yes;

somewhere else navigationbar gets set translucent: 

 [self.navigationcontroller.navigationbar setbackgroundimage:[uiimage new]                                               forbarmetrics:uibarmetricsdefault];  self.navigationcontroller.navigationbar.shadowimage = [uiimage new];  self.navigationcontroller.navigationbar.translucent = yes;

and make solid colour again:

 self.navigationcontroller.navigationbar.shadowimage = nil;  self.navigationcontroller.navigationbar.translucent = no;

but code seems mess layout perhaps there way change opacity of navbar , statusbar without affecting layout?


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