iOS: Add UIView below UINavigationBar - ios

Question

if I try to add a view to the navigation bar in my custom UINavigationController with this code:
- (void)viewDidLoad {
[super viewDidLoad];
self.sv = (MyCustomView *)[[[NSBundle mainBundle]loadNibNamed:#"MyCustomView" owner:self options:nil] objectAtIndex:0];
self.sv.frame = CGRectMake(self.navigationBar.frame.origin.x, self.navigationBar.frame.size.height, self.navigationBar.frame.size.width, heightOfMyCustomView);
[self.navigationBar addSubview:self.sv];
}
and
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
[super pushViewController:viewController animated:animated];
viewController.view.frame = CGRectMake(viewController.view.frame.origin.x, viewController.view.frame.origin.y + heightOfMyCustomView, viewController.view.frame.size.width, viewController.view.frame.size.height - heightOfMyCustomView);
}
when I push a controller, the top part of the controller's view is hidden by my custom view I added to the navigation bar.
How can I put the controller's view down below my custom view?

Answer 1

I'd also suggest to take a look at UINavigationItem.titleView property, that gives you an ability to provide your view for navigation bar title area.

Answer 2

In your custom UINavigationController init method assign delegate to itself, like this:
CustomeNavCtrl.m file:
#implementation CustomeNavCtrl
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.delegate = self;
}
return self;
}
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{
//Todo:viewController.view layout
//Todo:send MyCustomView to back or something other you like.
}
CustomeNavCtrl.h file:
#interface CustomeNavCtrl : UINavigationController<UINavigationControllerDelegate> {
}