iOS query biological sex

gistfile1.m

NSError *error;
HKBiologicalSexObject *bioSex = [healthStore biologicalSexWithError:&error];

switch (bioSex.biologicalSex) {
    case HKBiologicalSexNotSet:
        // undefined
        break;
    case HKBiologicalSexFemale:
        // ...
        break;
    case HKBiologicalSexMale:
        // ...
        break;
}