Override delegates about rdvtabbarcontroller

[robbdimitrov]

You can use the RDVTabBarControllerDelegate method

/**
 * Asks the delegate whether the specified view controller should be made active.
 */
- (BOOL)tabBarController:(RDVTabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController;

To get the index of the view controller use

NSInteger index = [tabBarController.viewControllers indexOfObject:viewController];

Another option is to subclass the tabBarController and add the custom logic and delegate methods in the subclass.

[CavalcanteLeo]

it WORKED properly, but i don't know if it's the best way

- (BOOL)tabBarController:(RDVTabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController{

    NSInteger index = [tabBarController.viewControllers indexOfObject:viewController];
    if ([tabBarController selectedViewController]  == [tabBarController viewControllers][index]){

        if ([[tabBarController selectedViewController] isKindOfClass:[UINavigationController class]]) {
            UINavigationController *selectedController = (UINavigationController *)[tabBarController selectedViewController];

            if ([selectedController topViewController] != [selectedController viewControllers][0]) {
                [selectedController popToRootViewControllerAnimated:YES];
            }
        }
/****
HERE IS THE TRICK:
*/
        if (index == 2) {
            index = 0;
            [self tabBarController:tabBarController didSelectViewController:[tabBarController viewControllers][index]];
        }
        return NO;

    }
    return YES;
}






- (void)tabBarController:(RDVTabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController{

    NSInteger index = [tabBarController.viewControllers indexOfObject:viewController];

    if (index < 0 || index >= [[rdv_tabBarController viewControllers] count]) {
        return;
    }

    [tabBarController setSelectedIndex:index];
}

[robbdimitrov]

It looks ok, a little lengthy, but seems fine. What happens if [tabBarController setSelectedIndex:index]; is called in the if-block after setting the index to 0?

- (BOOL)tabBarController:(RDVTabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController{
...
    if (index == 2) {
        index = 0;
        [tabBarController setSelectedIndex:index];
    }
    return NO;
...
}