UINavigationController title in iOS seems corrupted - ios

Question

When I present a UINavigationController modally and then push (without animation) some UIViewcontrollers onto it, the finally shown navigationItem.title is different from what I would expect.
I tried to narrow my issue down and came up with the following short code to duplicate the issue:
#implementation DummyRootVC
- (void) viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
UINavigationController* nc = [[UINavigationController alloc] initWithRootViewController:[[Dummy1VC alloc] init]];
[self presentViewController:nc
animated:false
completion:nil];
}
#end
#implementation Dummy1VC
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor=[UIColor whiteColor];
self.navigationItem.title= #"DUMMY1";
[self.navigationController pushViewController:[[Dummy2VC alloc] init]
animated:false];
}
#end
#implementation Dummy2VC
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.title= #"DUMMY2";
self.view.backgroundColor=[UIColor yellowColor];
[self.navigationController pushViewController:[[Dummy3VC alloc] init]
animated:false];
}
#end
#implementation Dummy3VC
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor=[UIColor orangeColor];
self.navigationItem.title= #"DUMMY3";
[self.navigationController pushViewController:[[Dummy4VC alloc] init]
animated:false];
}
#end
#implementation Dummy4VC
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.title= #"DUMMY4";
self.view.backgroundColor=[UIColor greenColor];
for (UIViewController* vc in self.navigationController.viewControllers) {
NSLog(#"VC Stack: %# Title:%#",vc,vc.navigationItem.title);
}
NSLog(#"End");
}
#end
In AppDelegate I set:
self.window.rootViewController = [[DummyRootVC alloc] init];
When running that code the displayed title is „Dummy 2“ and the back-button is named „Dummy 4“, while I actually would expect a title „Dummy 4“ and a back-button named „Dummy 3“.
The log shows as expected the correct ViewController-Stack and the backgroundColor is (as expected) green (and interestingly is still green after one "back" click):
VC Stack: Title:DUMMY1
VC Stack: Title:DUMMY2
VC Stack: Title:DUMMY3
VC Stack: Title:DUMMY4
End
I could work around that issue since it seems somewhat related to the non-animation setting in combination with presenting the navigation controller modally, but I would like to understand the underlying issue…
Can anyone provide me with some insight? Is this some bug or am I doing (as I suspect) just something the wrong way?
Thanks!

Answer 1

Put the push/present from viewDidLoad to viewWillAppear or viewDidAppear so that the viewController can init it's subview correctly to avoid problem :D