ios - How Does iPhone's Email app recognize an Address? -

i have been playing around iphone , realized email app of iphone can recognize if line within email represents address. interestingly enough works many address patterns. tried usa , germany, france , spain. in cases address highlighted blue link phone number be. question algorithm behind address detection?

check uidatadetectortypes in documentation. you'll find uidatadetectortypeaddress detects strings formatted addresses. add detector type uitextview.