如何在TabBarController中的所有VC上呈现modalViewController

I have a UITabBarController with 5 tabs. I want to be able to present a ViewController over all of the tabs, just above the Tab Bar. Currently the issue I am having is that when I present the ViewController modally, it is not visible. I have this function called whenever I select a row within a tableView:I have a UITabBarController with 5 tabs. I want