Iphone – UISlider with sound effect and vibration

If I understand you correctly, you want to keep playing the sound as long as the slider is touched, whether it's moving or not. To do this, register one method as the target for UIControlEventTouchDown (and perhaps UIControlEventTouchDragInside) events and another for some combination of UIControlEventTouchDragExit/TouchUpOutside/TouchUpInside/TouchCancel (depending on what you need). The first method starts playing the sound and the second one stops it.

If you want to play another sound when the slider is still touched but not moving, I would recommend starting a timer each time you receive a TouchDown/ValueCahanged/etc event:

self.touchTimer = [NSTimer scheduledTimerWithTimeInterval: kDelay
                                                target:self
                                              selector:@selector(noMovement:)
                                              userInfo:nil
                                               repeats:NO];

Then, whenever you receive another ValueChanged even, you cancel the timer and trigger another (or, better, reschedule the original one). When the timer triggers, it means the user hasn't moved the slider since kDelay, and you can change the sound being played. (You need to cancel the timer when you get a TouchUpInside/Outside event too.)

Hemant,

The maximum volume you can have is when player.volume is equal to 1.0 (so long as the ringer volume is all the way maximum as well).

If the ringer volume is not at maximum, you can only go as high as whatever it is at by again using the value of 1.0

However, you could implement the MPVolumeView (I'm almost positive, as Pandora does it) and then you use that slider in your app instead. Then you can just set player.volume always equal to 1.0 and let the slider change the ringer volume.

More information on if you want to use MPVolumeView: http://developer.apple.com/iphone/library/documentation/MediaPlayer/Reference/MPVolumeView_Class/Reference/Reference.html and How do you implement an MPVolumeView?

I may be wrong, but I think Apple allows MPVolumeView if you use it as-is. They say in the class reference that it now changes the device ringer volume when you move the slider (which it didn't used to and that's why people were having to access private API to do). I'm going to try and implement it on my next update here in a week, so if I get rejected, I'll come back here and update this post to let everyone know.