thanx, but i get errors with the project settings you gave, what worked for me was:
looking up the FacebookSDK directory after installing the FacebookBOOK 3.20 pkg file downloaded from facebook,
and copy the FacebookSDK dir to the ios dir of my project.
then add this to my project file:
LIBS += -F$$PWD/ios/FacebookSDK
LIBS += -framework FacebookSDK
LIBS += -framework Security
LIBS += -framework SystemConfiguration
are the last to additions necessary?