Xcode Storyboard Tabbed application (UITabBarController) - tell when tab selected

Question

Using Xcode 6 I have created an Tabbed Application using a storyboard with the supplied template.

I need a function to fire when the third tab of the UITabBarController is selected.

I can’t use the ViewDidLoad as I need it fire every time the view is accessed by clicking on the tab (not just the first time( and I can't use ViewWillAppear as I need specific behaviour when view is accessed via the tab as opposed to segued back to from subsequent (modal) view controllers.

Any advice would be appreciated. Many thanks in advance.

Abubakr Dar · Accepted Answer · 2015-02-01T09:33:21.597

2

Implement this delegate method of UITabBarControllerDelegate on some UIViewController class

- (void)tabBarController:(UITabBarController *)theTabBarController didSelectViewController:(UIViewController *)viewController {
NSUInteger indexOfTab = [theTabBarController.viewControllers indexOfObject:viewController];
// Your code here
    }

OR

You can subclass UITabBarController and override the following method.

- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item {
NSUInteger indexOfTab = [[theTabBar items] indexOfObject:item];
// Your code here}

edited Feb 01 '15 at 09:33

answered Jan 31 '15 at 18:49

Abubakr Dar

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Thanks for the quick reply. Where should I implement the function - in the app delegate ? – Carl Gilbert Feb 01 '15 at 08:43
@CarlGilbert I have updated my answer for you, let me know if it helps. – Abubakr Dar Feb 01 '15 at 09:05
Tried implementing in the app delegate but it is not being called – Carl Gilbert Feb 01 '15 at 09:19
have you set its delegate to self? – Abubakr Dar Feb 01 '15 at 09:29
If you are having issue with delegate way, Try the second way; simply subclass your tabbarcontroller and override the method in answer. – Abubakr Dar Feb 01 '15 at 09:35
thanks for the update, have implemented on one of my UIViewController classes but it is still not being called :-( – Carl Gilbert Feb 01 '15 at 09:42
in the viewdid load of any viewcontroller write this: self.tabBarController.delegate = self; – Abubakr Dar Feb 01 '15 at 09:44
@CarlGilbert, did my last comment helped? – Abubakr Dar Feb 02 '15 at 09:37

Xcode Storyboard Tabbed application (UITabBarController) - tell when tab selected

1 Answers1