Changes

Select the text field and change the Keyboard property in the Attributes Inspector to Numbers and Punctuation, then change the Placeholder setting to US Dollars (USD). Once completed, the view should appear as illustrated in the following figure:

[[Image:ios_7_uipickerview_example_layout2.png|The user interface layout for an iOS 7 UIPickerView example app]]

}

</pre>

== Implementing the DataSource Protocol ==