MY Epson printer and my iPad both indicate that they are connected to the same wireless network. The printer supports AirPrint. When I click PRINT and look for the printer the message comes back that no printer has been found.
There are many ways to connect to an AirPrint Capable Printer..
I would suggest; perusing the Apple Support Documents regarding: AirPrint
OS X: Connecting a Wi-Fi printer to your Wi-Fi network
Retrieving data ...