Although it’s been announced that Qt Positioning had been ported to Android and iOS, I believe that Qt Positioning is still missing for iOS in the latest Qt 5.3 beta release. Why is that ?
One can easily check that this module is missing for iOS :
(1) Try using QT += positioning (in .PRO file)
(2) note that qt_lib_positioning.pri does not exit in the modules subdirectory for iOS (5.3/ios/mkspecs/modules)