navigation: referencing root v using event

[Rick Benitez]

Hello:

I have a question regarding the following snippet.

//give sketchscreen a ref to Main.as to call the homescreen func

var rootMain:Main = this.root as Main;

//let's go to main and show the homescreen

rootMain.goToHomeScreen();

Versus using....

var scrnNav:ScreenNavigator = new ScreenNavigator();

scrnNav.addScreen("homeScreen", new ScreenNavigatorItem(HomeScreen));

addChild(scrnNav);

scrnNav.showScreen( "homeScreen" );

I was told there could be a situation where "This can fail if "root" is ever unavailable (unlikely but can happen) and it's a lot cleaner using the events"

Can anyone confirm or deny?

Please advise,

RIck