Add a menu to an existing iOS application

Hello, I have an application that loads a pdf with the library vfr / reader. I would like to add a menu like the one in the picture that I attach to the top of the app. The menu has the following items: category 1 category 2 category 3 click on the category 1 has the application should go to the pdf on page 1 click on category 2, the application must go to page 5 click on category 3, the application must go to pages 10 I enclose application and menu design