ios - MapkIt coordinates being changed -

trying plot things on mapkit map lat , lng being passed in being changed?

i pass in lat of 39.34343 , gets changed 7.33121668909306e-304?

what doing wrong?

cllocationcoordinate2d coordinate; coordinate.latitude = *(thing.lat); coordinate.longitude = *(thing.lng); 

if "po coordinate.latitude" after above code, 7.33121668909306e-304

latitude isn't object, it's double (typed cllocationdegrees). can print int or double this:

// code int = 3; double doub = 2.3;  // in debugger (lldb) print (int) (int) $1 = 3 (lldb) print (double) doub (double) $2 = 2.3