Today is the first day my camera quit working on my iPhone.  I went out to play in the snow, and take some photos and when I went to look at the different photos I took a few hours later they weren’t there.  This isn’t the first time I’ve heard of this random occurrence unfortunately.  You have to go into the settings and erase all information and do a restore.  It’s the only thing that fixes the error.  Although, I think next time I will be going to the Apple store, but with the blizzard that we just had I knew they would not be open.