Problems changing from standalone to iOS

Hello, I googled this for a long time, but i haven't found anything out yet. So my problem is, that I actually wanted to create an iOS Game. I didn't recognize the target platform options. So when i did, I changed from standalone to iOS and it took a long time to reimport everything. But when i tried to play the Game, it said: All compiler errors have to be fixed or something like that. I went to Monodevelop to see what was the mistake or what i have to change for the iOS Game. But Monodevelop found no mistakes! I surely know there are some routines that do not work on iOS. I even removed and replaced all GetKey Methods because they cant work on iOS. How can I now find out what i have to change?