I'm new in iOS development. But anyway now I can: post private messages to my friends on Facebook and Twitter.
Is there any way to post message to my skype contact's?
Does skype provide any API for iOS to post message to skype contact's?
Is there any way to gain skype contacts information (email, phone number), so to be able to post email/SMS to skype contact directly?
What is the best way to post data to my skype contacts?
No currently there is no public API is provided for iOS.
You can check their documents skypekit and api reference for more details.
You can use Skype Uri for communicating with skype from your APP.