<insert digitPressed method here>
Click the Utilities View and in the Object Library under Controls, find Label; point, press, drag and release the icon into the view of the Storyboard.
Grab & drag the lower-right handle to resize the field, and resize the font in the Attributes Inspector; change the text to the number zero. Change the background color of the storyboard view. Then click Run to see what it looks like in the iPhone Simulator:
The file in Recents is actually the project we are about to create.
Click Next, save project in your developer folder, click Create.
Navigator is on left. Click MainStoryboard.storyboard. Hide the next column.
Hide the Navigator View. Click the Assistant Editor button. You will see the CalculatorViewController.h file: