打招呼， 跟、同， 和。 跟你打招呼， 和他打招呼， 同谁打招呼

打招呼 cannot be used with 对， but it can be used with 向。 More on this later.

What you need to know is that 打招呼 goes with 跟，同，和.

I don't really understand how this word functions in the language and I never use it. I imagine its simply convention and once I accept that I'll be much happier.