Figure 30-1
Select the Picker View object in the view canvas, display the Assistant Editor panel and verify that the editor is displaying the contents of the PickerViewController.h file. Ctrl-click on the Picker View object and drag to a position just below the @interface line in the Assistant Editor. Release the line and in the resulting connection dialog establish an outlet connection named picker. Repeat these steps to establish outlet connections from the Text Field and Label to properties named dollarText and resultLabel respectively.
Next, select the PickerView component in the View window and display the Connections Inspector (View -> Utilities -> Show Connections Inspector). Click in the round circle to the right of the dataSource outlet in the inspector window and drag the line to the Picker View Controller icon located in the panel beneath the view canvas (Figure 30-2). Repeat this task for the delegate outlet.c