A "progress bar" that also allows you to select a range.
I use it to indicate progress of recording audio, represent trimming it, and then playing back only the selected range.
To be notified when either slider changes, register for UIControlEventValueChanged:
[mySlider addTarget:self action:@selector(valueChanged) forControlEvents:UIControlEventValueChanged];
If you use it, I'd love to hear from you: @barrettjacosbsen