Interaction mode defines how you allow your app to interact with an app user. Interaction mode is again based on Theme you choose for your app, namely Halo, Spark, Modile. Default Interaction mode for Halo, Spark is mouse and for Mobile its touch.
But what if you want a different interaction mode rather than the default one, well its simple to change by using ‘interactionMode’ property and its usage is given below.
interactionMode="touch" //Other value 'mouse'
In ActionScript you can change at runtime using the setStyle function since its a style property like below.
setStyle( "interactionMode", InteractionMode.TOUCH ); //Other value 'InteractionMode.MOUSE'
Happy new year.