Bobby. You can't do it directly from an iPhone. You have to upload the photos from the iPhone to the photobucket app, then copy the code from photobucket and paste it into the thread.
It's a phone that is pretty much a computer too. The question is for my cuz John, (Diamond Dill). He is new to the site and wants to load a picture to his profile and he only has an iPhone not a home computer.
I always email the pics to myself through my Droid phone, then post the THB once i get to a computer, which is often. He could always send them to you and have you post them up.