Intro to Pickers
Shown below, a picker
is an interface element for displaying a list of options to a user:
A picker in the Clock app on the iPhone.
A picker is a slot-machine lookalike that presents a list of options to a user.
In the Clock app, you use a picker to set the amount of time for the timer to run. Pickers are used primarily in situations where you have a list of values a user can choose from. Pickers can be used to specify numeric values—as shown in the previous image—or enumerated strings, such as states or cities. ...