To set the entry/exit direction of message box, there is two property show animation and hide animation through which we can add entry/exit direction of message box:
showAnimation: 'slideIn',
hideAnimation: 'slideOut',
If you want to learn more about Message Box, then you can read my article:
Sumit Kesarwani
25-Jun-2013showAnimation: 'slideIn',
hideAnimation: 'slideOut',
If you want to learn more about Message Box, then you can read my article:
http://www.mindstick.com/Articles/fb7d3c14-a337-47fe-ad25-2332387433c2/?Entry/Exit%20Direction%20of%20Message%20Box%20in%20Sencha%20Touch