Property 'frame' not found on object of type 'ad'

I am trying to move a button in Xcode, but I am getting an error. Ad is the name of my button. Here is my code

CGRect frame = ad.frame; //Property 'frame' not found on object of type 'ad'

frame.origin.x = 129;

frame.origin.y = 401;

ad.frame = frame; //Property 'frame' not found on object of type 'ad'