Parse with NSSortDescriptor example

parse_nssortdescriptor

NSSortDescriptor *commonLikesDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"fblikes" ascending:YES comparator:^NSComparisonResult(NSArray* obj1, NSArray* obj2) {

    NSMutableSet *intersection1 = [NSMutableSet setWithArray:user[@"fblikes"]];
    [intersection1 intersectSet:[NSSet setWithArray:obj1]];
    
    NSMutableSet *intersection2 = [NSMutableSet setWithArray:user[@"fblikes"]];
    [intersection2 intersectSet:[NSSet setWithArray:obj2]];
    
    return [@([intersection1 count]) compare:@([intersection2 count])];
}];

__block PFGeoPoint *currentLocation = [PFUser currentUser][@"location"];
NSSortDescriptor *distanceDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"location" ascending:YES comparator:^NSComparisonResult(PFGeoPoint* obj1, PFGeoPoint* obj2) {
    
    return [@([currentLocation distanceInMilesTo:obj1]) compare:@([currentLocation distanceInMilesTo:obj2])];

}];