Im working on a basic sound app where I want the users to be able to press an icon to hear a sound (say of the ocean or wind etc...) Can anyone tell me or point me in the right direction as to how to include a timer? For example a picker or some function like play track for one hour and then stop, or turn off app Thanks

A google search for 'Objective C Timer' turns up tons of results. Take what you can learn from them and what David told you on how to select a specific screen (in the post where you were trying to get songs to loop) and see if you can get something basic running. Repost how it goes for ya.

Thanks I was trying to Google NSTimer so that was wrong I guess? Im off (again) to search the net. Appreciate the guidance Parker :)

In English: a) Create an NSTimer property in the .h file of whatever..like BT_screen_audio.m b) In the .m file (BT_screeen_audio.m) @synthesize the property (like all the other properties you see synthesized) c) Write a method to fire every second or so that magically figures out how long the songs been playing? b) When the screen loads, start the timer and set it to repeat...something like: [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(yourCoolMethod:) userInfo:nil repeats:YES]; Inside the method you create (yourCoolMethod in this case) you'll need a way to check how long this process has been happening. When the time-runs-out, trigger another method, like 'stopAudio' or 'kill app' or whatever.