Behavior like calendar app in iphone

Question

In the calendar app in the iphone, when you click in the starts/end cell, the picker is already fill with data with no delay?

How?

Answer 1

Your question is not very clear. If you're asking how a UIPickerView can start with a certain value selected, you simply need to use UIPickerView's -selectRow:inComponent:animated: with animated set to NO within -loadView in your UIViewController (or whatever method fires when the view is presented on the screen).