Printing from Your iPhone
You can print directly from your iPhone to AirPrint-compatible printers.
First, set up and configure your AirPrint printer (see the instructions that came with the printer you use).
When you are in the app from which you want to print, tap the Share button. Tap Print on the resulting menu. You might need to swipe to the right to expose the Print command. (If you don’t see the Share button or the Print command, the app you are using doesn’t support printing.)
The first time you print, you need to select the printer you want to use. On the Printer Options screen, tap Select Printer. Then tap the printer you want to use. You move back to the Printer Options screen and see the printer you selected.
Tap the – or + to set the number of copies; the current number of copies is shown to the left of the buttons. Tap Print to print the document.
The next time you print, if you want to use the same printer, you can skip the printer selection process because the iPhone remembers the last printer you used. To change the printer, tap Printer and tap the printer you want to use.