In a previous post I talked about several non-obvious gestures that let you exit from an app but, if you're a developer, you'll sometimes want to provide a Close button or some other way for users to edit more directly.
The most straightforward way is stage.nativeWindow.close(). This is actually a call that must be made from within a method in your main Sprite class, or any other suitable DisplayObject since it references the read-only stage property.
The actual call is to the NativeWindow.close() method. There are certain events associated with closing a window, or deactivating it, which I've covered in a previous post.
To summarize, here's a snippet to give yourself a Close button in your Sprite:
...
var closeBut:LabelButton = new LabelButton();
closeBut.label = "Close";
closeBut.addEventListener(MouseEvent.CLICK, closeApp);
}
private function closeApp(event:MouseEvent):void {
stage.nativeWindow.close();
}