一个大的猫窝,voidcat

               //手动排序下
               [arr sortUsingComparator:^NSComparisonResult(RoomUserInfo *obj1, RoomUserInfo *obj2) {
                   if ([obj2.location longLongValue] > [obj1.location longLongValue])
                   {
                       return NSOrderedAscending ;
                   }
                   else if ([obj2.location longLongValue] == [obj1.location longLongValue])
                   {
                       return NSOrderedSame;
                   }
                   else
                   {
                       return NSOrderedDescending;
                   }
               }];