Question

I have created two instances of a MasterViewController derived from UIViewController class

_masterViewController = [[MasterViewController alloc] initWithNibName:@"MasterViewController_iPhone" bundle:nil];

// second instance with same class and duplicate nib view
_favItemMasterVC = [[MasterViewController alloc] initWithNibName:@"favMasterViewController_iPhone" bundle:nil];

Both the MasterViewController_iPhone & favMasterViewController_iPhone view are same.
Now I want to check which of the UIViewController is currently selected(eg:on tabbar).
How can i find the difference between both objects?

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

if ([viewController isKindOfClass:[_favItemListMasterVC class]]
{ // it is always called in both cases}


isMemberOfClass: // is also not working

How to check the difference?

Answer 1

Not sure I have understand what are you doing, but if _favItemListMasterVC and _masterViewController are pointing to the same VCs added to the UITabBar, you can check it simply comparing pointers

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

if (viewController == _favItemListMasterVC)
{
    //the visible view controller is _favItemListMasterVC
}