Changes

The application user interface is going to comprise two buttons labeled “Play” and “Stop” and a slider to allow the volume of playback to be adjusted. Select the Main.storyboard file, display the Object Library (View -> Utilities -> Show Object Library), drag and drop components from the Library onto the View window and modify properties so that the interface appears as illustrated in Figure 88-1:

[[Image:iso_8_audio_demo_ui.png]]