we wont discuss about swinging, its not the formula the one who makes you cannot swing, its your body physics don't allow it that is the end i wont discuss it. Also were do you plan to get that materials i mean common carbon nano fibers do you think they are that much in the market.
What i think is possible is making webs around trees or something like ropes and swing like Tarzan however be sure that if you fall you have something like grass in the floor and i wouldn't suggest you do this in building because if you fall... Well you will be on the news.
Also is possible to use it for parkour but not swinging at fast speeds like spidey unless you have super human super powers.