Shifting from .Net to IOS app(Iphone)

I just want to start with this question: What happened if IOS Developement also not have any scope?. Don't think i'm discourge. Be practical!

He already, spent 8 months in .Net, then why he wants to shift? Then what is the purpose of 8 months? Since he had spent some time with .Net, i hope that he learn a lot about .Net.

Also, advice him he must have "Never Give up" attitude. First, settle with .Net. If he shift this time, he needs more time to learn IOS concepts also, it will kill another 6 months or more.

Hope this helps!