iphone - How to know I'm leaving from a location -


i'm using core location ios 6. have been searching find appropriate soln

my question is: - how can know if leaving point x (after cross it)?

- (void) locationmanager:(cllocationmanager *)manager didupdatetolocation:(cllocation *)newlocation fromlocation:(cllocation *)oldlocation  cllocation *curpos = locationmanager.location;  latitude = [[nsnumber numberwithdouble:curpos.coordinate.latitude] floatvalue];  longitude = [[nsnumber numberwithdouble:curpos.coordinate.longitude] floatvalue];  if (abs( latitude - xlocationlat)>0.1 ||abs( longitude - xlocationlon)>0.1 ) {     nslog(@"he out"); } }

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