“Unrecognized selector sent to instance” in swift

Question

I have no idea what I am doing wrong. I am also quite new to programming so I am not very good at debugging. This was a test app so that I can see how swift ties in with app

Answer 1

If you have a colon in the selector name (buttonAction:) you have to have the sender as a n argument for the buttonAction function, if you don't have any colon in the name the sender will not be sent.