Picker

The Picker view is a control for selecting a text item from a list of data.

A Picker displays a short list of items, from which the user can select. However, a Picker doesn't show any data when it's first displayed. Instead, the value of its Title property is shown as a placeholder on the iOS and Android platforms:

When the Picker gains focus, its data is displayed and the user can select an item:

Following selection, the selected item is displayed by the Picker:

There are two techniques for populating a Picker with data: