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Build the Application

To build the Currency Converter application:

1. In Xcode, choose File > Save All to save the changes made to the project’s source files.

2. Click the Build toolbar item in the project window.

The status bar at the bottom of the project window indicates the status of the build. When Xcode finishes—and encounters no errors along the way—it displays “Build succeeded” in the status bar. If there are errors, however, you need to correct them and start the build process again. See “Correct Build Errors” for details.

Extra: Check Out the Look Up Documentation

Xcode gives you access to ADC Reference Library content. You can jump directly to documentation and header files while you work on a project. Try it out:

1. Open the ConverterController.m file in an editor window.

2. Option–double-click the word setFloatValue in the code. (Hold down the Option key and double-click the word.) The Developer Documentation window appears with a list of relevant method names in its detail view. This Reference Library access system provides a fast way to get to reference material. Read more in “Expanding on the Basics.”

3. Close the Developer Documentation window.

4. Command–double-click the same word. A pop-up menu with a list of method names appears.

5. Choose [NSCell setFloatValue]. This time, Xcode displays the NSCell.h header file in an editor window and highlights the declaration of the setFloatValue method.

6. Close the header file.

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