Get the view of the bar button item with respect to the right most item on the navigation bar. Useful for when you want to the frame of a UIBarButtonItem on a UINavigationBar

Get specific view of a UIBarButtonItem from a UINavigationController

/** Get the view of the bar button item with respect to the right most item.
 @param viewsFromRight The index of the button on the navigation controller from the right side. Pass 0 if the right most view is desired.
 @param navController The UINavigationController where the bar button item exists.
 @returns A UIView of the item on the navigation bar provided, x number of views from the right side (where x is the viewsFromRight property.
 */
- (UIView *)barItemViewFromRight:(NSUInteger)viewsFromRight ofNavController:(UINavigationController *)navController {
    
    UINavigationBar *navBar = navController.navigationBar;
    UIView *rightView = nil;
    UIView *desiredView = nil;  // The right-most view to hold and eventually return
    
    if (viewsFromRight > navBar.subviews.count) {
        // There are not enough subviews on the navigation bar
        return nil;
    }
    
    for (int i = 0; i <= viewsFromRight; i++) {
        for (int j = 0; j < navBar.subviews.count; j++) {
            UIView *v = navBar.subviews[j];
            if (rightView == nil) {
                rightView = v;
            } else if (desiredView) {
                if (v.frame.origin.x < desiredView.frame.origin.x
                    && v.frame.origin.x > rightView.frame.origin.x) {
                    rightView = v;  // The right most view
                }
            } else if (v.frame.origin.x > rightView.frame.origin.x) {
                rightView = v;
            }
        }
        desiredView = rightView;
        rightView = nil;
    }
    return desiredView;
}