Changes

At this point the user interface design phase of our project is complete and the view should appear as illustrated in Figure 11 3. We now are ready to try out a test build and run.

The next step is to extend the subclass to include the two outlets and our action method. This could be achieved by manually declaring the outlets and actions within the UnitConverterViewController.h file. A much easier approach is to use the Xcode Assistant Editor to do this for us.

With the Main.storyboard file selected, display the Assistant Editor by selecting the View -> Assistant Editor -> Show Assistant Editor menu option. Alternatively, it may also be displayed by selecting the center button (the one containing an image of a bow tie and tuxedo) of the row of Editor toolbar buttons in the top right hand corner of the main Xcode window as illustrated in the following figure:

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