iphone - UIPickerView: Get row value while spinning?

Question

I'd like to get the row value in real-time as the iPhone user spins a wheel in a UIPickerView (not just when the wheel settles onto a particular row). I looked into subclassing UIPickerView then overriding the mouseDown method, but I couldn't get this to work. Any suggestions would be very much appreciated.

Answer 1

Perhaps try implementing the delegate method:

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view

You could treat it as a passthrough (just passing back the reusingView parameter) but each time it was called you would know that view was coming on the screen as the user scrolled - then you could calculate how many views offset from this one the center view was.