Unable to add UIScrollView to UINavigationBar

Question

I want my scrollview to be added as UINavigationBar's titleview, but strangely I am unable to do so.

In viewDidLoad:

navController = [[UINavigationController alloc] init];
    self.view.frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height - 20 - 45 - 2);
    CGRect frame = navController.view.frame;
    frame.size.height -= 20;
    [self.view addSubview:navController.view];

    UIScrollView *someview = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 44)];
    someview.backgroundColor = [UIColor orangeColor];
    navController.navigationItem.titleView = someview;

It is a very simple piece of code, but I can't figure out that what I am missing. Please someone help me... Thanks.

Side Note: I am initiating UINavigationController without any root controller, since my first concern is adding scrollview to navigationbar.

score 0 · Answer 1 · answered Aug 30 '13 at 11:48

Have you tried to add the scroll view to a container view. Something like this:

navController = [[UINavigationController alloc] init];
self.view.frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height - 20 - 45 - 2);
CGRect frame = navController.view.frame;
frame.size.height -= 20;
[self.view addSubview:navController.view];

UIView *container = [[UIView alloc] initWithFrame:CGRectMake(...)];
UIScrollView *someview = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 44)];
someview.backgroundColor = [UIColor orangeColor];
[container addSubview:someview];
navController.navigationItem.titleView = container;

score 0 · Accepted Answer · answered Aug 30 '13 at 11:51

0

navController.navigationItem is never actually added to the navigation bar. It exists because the nav controller is a subclass of UIViewController. But it isn't used.

Add a root view controller to the nav controller and add the scroll view as its navigationItem titleView.

Depending on what you're after you may also want to subclass the nav controller to inject your custom titleView when any new view controller is pushed.

answered Aug 30 '13 at 11:51

Wain

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Ok I am getting your idea. Can you tell me how can I push my custom titleview in custom navigationcontroller? – NightFury Aug 30 '13 at 12:14
Start by adding your controller as the nav controller delegate and implementing `navigationController:willShowViewController:animated:`. – Wain Aug 30 '13 at 12:17
Instead of `navigationItem` you could use the `topItem` property right? – Ryan Poolos Aug 30 '13 at 12:25
@RyanPoolos, not sure if it is `nil` to begin with, but if set it should work, yes. – Wain Aug 30 '13 at 12:56
Just double checking. Your answer is definitely more portable and fullproof. – Ryan Poolos Aug 30 '13 at 14:01

Unable to add UIScrollView to UINavigationBar

2 Answers2