Best way to trigger a Modal View Controller on Tab Bar press. - uiviewcontroller

Question

When the user triggers a tabbar item I want to display present a modal view controller.
I have something working but it's probably not the cleanest way to do it. It also prevents the UITabBarItem to be in selected state.
What I did is setting this method to false and in the that method body presenting the view controller (via the RootViewController).
- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController{
UINavigationController *nvc = (UINavigationController*)viewController;
Do you guys have any idea of a cleaner implementation of this that would allow the TabBarItem to be highlighted ?

Answer 1

This is the one of the way to use the MVC on Tab bar...To highlighting the tab bar item like that.
id currentlySelected; //This will hold the address of the selected view
id dontAllowSelection; //This will hold the address of the Denied view
(BOOL)tabBarController:(UITabBarController *)tabBarControllers shouldSelectViewController:(UIViewController *)viewController
{
if (dontAllowSelection != nil && //If it is nil, we will skip it.
dontAllowSelection == viewController) //If the selected view is Denied return NO
{
return NO;
}
currentlySelected = viewController;
if (currentlySelected == someViewIWantToDisableOtherFor) //Any logic can go here to enable the Denied View.
{
dontAllowSelection = anotherViewIWantDisabled; //Set my denied view.
}
else
{
dontAllowSelection = nil; //Unsed the Denial.
}
return YES;
}