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In terms of user interface design, there is much to be gained by presenting the user with controls that are similar to physical, “real world” controls. When, for example, a user is presented with a UIButton object in the user interface of an iPad application they instinctively know that they are supposed to press it because that is what they know to do with a physical button.
Nowhere is this real world paradigm more prevalent than in the case of the iOS 4 UIKit Picker components. Both the UIPickerView and UIDatePicker provide a user friendly approach to allowing a user to review and make selections from a wide range of options. In this chapter we will talk about pickers in general before working through a simple example designed to demonstrate the basics of using the Date Picker class. The next chapter entitled [[An iOS 4 iPad Multiple Component UIPickerView Example (Xcode 4)|An iOS 4 iPad Multiple Component UIPickerView Example]] will cover the UIPickerView in more detail.
== The DatePicker and PickerView Components ==
