It looks like you are using a UITabBarController
.
You can only have up to 5 tab bar items without bringing up the additional item to customize the bar items. If you don't want the extra tab to allow for customization, your 6th item will be unreachable anyway, so just remove the last tab to make it 5 items.
From the UITabBarController Documentation:
The tab bar has limited space for displaying your custom items. If you
add six or more custom view controllers to a tab bar controller, the
tab bar controller displays only the first four items plus the
standard More item on the tab bar. Tapping the More item brings up a
standard interface for selecting the remaining items.
If you do not like this limitation, use a UITabBar directly. There is more work involved because you won't be using a UITabBarController which manages the view controllers of your tabs for you.