UITabBarController delegate methods never get called

Question

I'm currently refactoring my iPad application and instead of a button on the NavigationBar, I would like to put my Logout button as a TabBar button item.

All of my views are in a unique StoryBoard so I get my TabBar in my Appdelegate.m by this way :

// Add logout tab to tabbar
storyboard                      = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
UITabBarController *tabbar      = (UITabBarController *)[storyboard instantiateViewControllerWithIdentifier:@"tabbar"];
[tabbar setDelegate:self];

Of course the delegate protocol is declared in my Appdelegate.h

@interface AppDelegate : UIResponder <UIApplicationDelegate, UITabBarControllerDelegate>

After that, I create an empty viewController in order to create my logout tab :

UIViewController *logout        = [[UIViewController alloc]init];

Then I get tabbar viewControllers as NSMutableArray and add my logout VC :

NSMutableArray *viewControllers = [NSMutableArray arrayWithArray:[tabbar viewControllers]];

[viewControllers addObject:logout];

Finally I set tabbar viewControllers with my new array :

[tabbar setViewControllers:viewControllers];

I think that those steps are correct. So why does the didSelectViewController is not called when I change the displayed tab ?

If it can help, here's my didSelectViewController method (which is write in AppDelegate.m)

- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
    NSLog(@"onglet sélectionné : %d / %d", [tabBarController selectedIndex], [[tabBarController viewControllers]count]);
    //select the index where your logout button is
    if ([tabBarController selectedIndex] == [[tabBarController viewControllers]count]-1) {
        NSLog(@"logout");
    }
}

Thanks in advance for your help !

[Swift answer](https://stackoverflow.com/a/47861294/3681880) — Suragch, Dec 18 '17 at 02:18

score 9 · Accepted Answer · edited Nov 05 '16 at 12:21

9

Put [self setDelegate:self]; in your ViewDidLoad or somewhere where the object get's initialized

edited Nov 05 '16 at 12:21

Aamir

13,234
9
51
63

answered Feb 04 '14 at 10:28

kagmanoj

4,262
5
17
21

You mean set the delegate in an other viewController ? EDIT I ask this because currently all the code you see above in my post is in Appdelegate.m and this file does not have viewDidLoad method – neobagram Feb 04 '14 at 10:48
It works ! I set the delegate in an other viewController and the method gets called – neobagram Feb 04 '14 at 10:54

score -2 · Answer 2 · answered Feb 04 '14 at 10:27

try intialising the tabbar object;

// Add logout tab to tabbar
storyboard                      = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
UITabBarController *tabbar      = [[UITabBarController alloc] init];
tabbar      = (UITabBarController *)[storyboard instantiateViewControllerWithIdentifier:@"tabbar"];
[tabbar setDelegate:self];

UITabBarController delegate methods never get called

2 Answers2