I know UIPickerViews use a didSelectRow method to update labels etc when a row is selected.
I have a UIDatePicker that updates a label when a row is selected and don
A date picker does things a little differently. From the documentation:
When properly configured, a UIDatePicker object sends an action message when a user finishes rotating one of the wheels to change the date or time; the associated control event is UIControlEventValueChanged.
Because a UIDatePicker inherits from UIControl, you have access to all the various touch events you'd expect (TouchUpInside, etc).