Sick Tomato Plants

[Kasperek]

Hello all,

I'm trying to plant some tomatoes on my patio for the first time this year but unfortunately my tomatoes haven't been doing that great They have a bunch of spots on them and I also found what looks like it may be a gnat on one of the leaves.

http://imgur.com/a/0kSk8

Can they be saved or should I discard them and buy some new already grown plants?

Thanks!