IPhone (Cocoa Touch) Button that plays sound file on click?

Hello.
I am trying to create a button that, when clicked, it plays a given sound file in the app's filesystem.
This is what I have set up thus far:
Regular Rectangular button -> connected to NSObject Called "sounds" -> with the Event "playsound1" chosen as the event.
I then wrote the class files, brought them into Xcode file project under classes, and now I'm staring at sound.h and sounds.m with no idea what to do next.
I was able to create in a regular Mac OSX Cocoa, a button that plays the system beep using NSBeep. However, I don't know how to achieve this similar objective with using a given sound file in the iPhone Cocoa Touch.
Thanks

I have tried so many things. I'm so lost.

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