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'

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