Audio file and progress bar

I am trying to design an audio player. I need help regarding the progress bar. I want the status of progress bar to change as the audio progresses. I want progress bar to pause as I press Pause button and start again as I 开发者_StackOverflow中文版press start button. Please help... Thanks in advance...

Check the avTouch code sample. It is an audio player (exactly what you are trying to do), but plays a single file. It implements the progress bar, so this should help..