ios - push UIViewcontroller to UINavigation Controlller -

i have login screen , forgot password screen.forgot password screen connect navigation controller login screen not connect navigation controller how move login screen forgot screen

here code

forgotpasswod *secondviewcontroller =     [self.storyboard instantiateviewcontrollerwithidentifier:@"forgotpasswodpage"];      [self.navigationcontroller pushviewcontroller:secondviewcontroller animated:yes]; 

if want move viewcontroller navigation viewcontroller use presentview controller.  paste code in action method   - (ibaction)forgotpassword:(id)sender {      forgotpasswod *secondviewcontroller =     [self.storyboard instantiateviewcontrollerwithidentifier:@"forgotpasswodpage"];      uinavigationcontroller *controller = [[uinavigationcontroller alloc] initwithrootviewcontroller:secondviewcontroller];     [self presentviewcontroller:controller animated:yes completion:nil]; } 

when try code can change navigation bar color

if (floor(nsfoundationversionnumber) <= nsfoundationversionnumber_ios_6_1) {         // ios 6.1 or earlier         self.navigationcontroller.navigationbar.tintcolor = [uicolor colorwithhexstring:@"#37b578"];     } else {         // ios 7.0 or later         self.navigationcontroller.navigationbar.bartintcolor = [uicolor colorwithhexstring:@"#37b578"];         self.navigationcontroller.navigationbar.translucent = no;     } 

ok try code , tell me happen...