Changes

As previously described, our application is going to consist of a button and a text field. To begin the user interface design process, select the ''FileExampleViewController.xib'' file to load it the Interface Builder environment. Drag a UIButton and then a UITextField from the Object library panel (''View -> Utilities -> Object Library'') onto the view. Double click on the button and change the text to Save. Position the components and resize the width of the text field so that the layout appears as illustrated in the following figure:

[[Image:xcode_4_file_example_ui.jpg|The File I/O example UI in Xcode 4]]