My app using a Tab Bar Controller using storyboards. During the first time through the app, I want to use a UIPoppver on each of the Tab Bar buttons. However, to do this, I need to know the CGRect for each (I think). How do I go about doing this?

My app using a Tab Bar Controller using storyboards. During the first time through the app, I want to use a UIPoppver on each of the Tab Bar buttons. However, to do this, I need to know the CGRect for each (I think). How do I go about doing this?

here is how I solved this, thanks to the link provided above:
In my AppDelegate.h
Added:
- (NSMutableArray *)tabBarMutableArray;
In my AppDelegate.m
Added:
- (NSMutableArray *)tabBarMutableArray;
{
    UITabBarController *tabController           = (UITabBarController *)self.window.rootViewController;
    NSMutableArray     *tabBarItemsMutableArray = [NSMutableArray new];
    UITabBar *tabBar = tabController.tabBar;
    for (UIView *view in tabBar.subviews)
    {
        [tabBarItemsMutableArray addObject:view.description];
    }
    return  tabBarItemsMutableArray;
}
Now I can access the value anywhere with this:
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSLog(@"Array AppDelegate: %@", [appDelegate tabBarMutableArray]);
Results:
"<_UITabBarBackgroundView: 0x145e19f70; frame = (0 0; 1024 56); autoresize = W; userInteractionEnabled = NO; layer = <CALayer: 0x1700359c0>>",
"<UITabBarButton: 0x145e15950; frame = (254 1; 76 55); opaque = NO; layer = <CALayer: 0x17002a9a0>>",
"<UITabBarButton: 0x145e19dd0; frame = (364 1; 76 55); opaque = NO; layer = <CALayer: 0x1700345c0>>",
"<UITabBarButton: 0x145d0f8a0; frame = (474 1; 76 55); opaque = NO; layer = <CALayer: 0x17803cc60>>",
"<UITabBarButton: 0x145e1a360; frame = (584 1; 76 55); opaque = NO; layer = <CALayer: 0x1700348e0>>",
"<UITabBarButton: 0x145e1a940; frame = (694 1; 76 55); opaque = NO; layer = <CALayer: 0x170034c60>>",
"<UIImageView: 0x145e1a090; frame = (0 -0.5; 1024 0.5); autoresize = W; userInteractionEnabled = NO; layer = <CALayer: 0x1700369e0>>"