Definitely no seeds, nuts, or corn. Absolutely avoid those. Red meat (steak and pork) and raw foods (veggies and fruits) are very very hard to digest as well. Everything else, you need to play by ear. It really depends on the person. Peel all of your fruits just to be on the safe side. Try to eat as healthy as possible- minimal fried foods because they are too greasy.
The Garden of Life's Primal Defense and Green Food helped me for years
Also eat yogurt! My mom tried to get me to eat yogurt for years, but I refused because I didn't like the taste. I'm in remission now and can try new foods, and love yogurt now! If you don't like yogurt, try Acidophilus. It comes in pills or liquid form, and it contains bacteria that help with digestion. Crohn's patients usually lack these bacteria because our bowels are in such turmoil.
And drink tons of water. Constantly. Water can only help you.