iOS: Stream audio file with pause, forward functions

I know how to stream an audio file to iphone. But does anyone know how to include functions like pause, or having a slider bar to fast forward to downloaded portions of the audio?

Help much appre开发者_StackOverflow中文版ciated!

I've used the AudioSteamer classes in this project by Matt Gallagher with a lot of success. It was simple enough to implement my own progress slider using a NSTimer to poll the current duration, and the classes implement a seekToTime: function to allow moving the slider to change the position in the stream.