Step 3Designing the GUI (Graphic User Interface)
Creating the interface:
1) With interface builder open, find the buttons. Pick a style you like & drag 2 of them over to the window
2) Double click on them to rename one "On" & the other "Off"
3) Resize the window if you want
4) In the library find the thing that looks like a blue cube (NSObject) & drag it to the window with the list of files
5) Click on the object you just added to the window
6) Press 'Command + 6' to open the Identity Inspector
7) Under the section 'Class' type MainController
8) Press 'Command + 5' to open the Connections Inspector
9) Click & drag the little circle to each of the respective buttons. (e.g. ledOn to the On button)
10) Save & close Interface builder
11) Press "Build & Go" In Xcode to run the cocoa app
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