iPhone: Sorting based on location

Question

I have been working on an iPhone app, where-in i have list of users in a NSMutableArray like below.

myMutableArray: (
    {
        FirstName = Getsy;
               


        

Answer 1

- (void)viewDidLoad {
    [super viewDidLoad];
// This Array Taken Globally
List_of_locationsArray =[[NSMutableArray alloc]initWithObjects:
  @{@"latitude" : @"17.415045",@"logitude":@"78.421424"} ,@{@"latitude" : @"17.415045",@"logitude":@"78.421424"},@{@"latitude" : @"17.415045",@"logitude":@"78.421424"},@{@"latitude" : @"17.415045",@"logitude":@"78.421424"},@{@"latitude" : @"17.415045",@"logitude":@"78.421424"}
 ,nil];

}

-(void)sortingLocationsArray{
//    CLLocation* currentLocation =[[CLLocation alloc]initWithLatitude:[currentLatitude doubleValue] longitude:[currentLogitude doubleValue]];
      CLLocation* currentLocation =[[CLLocation alloc]initWithLatitude: currentLatitudeHere longitude:CurrentLogHere];

   NSMutableArray* tempLocationsArr = [[NSMutableArray alloc]initWithCapacity:[locationsArray count]];
    for (int i=0; i<[locationsArray count]; i++) {
        CLLocationDegrees latValue = [[locationsArray[i] objectForKey:@"latitude"] doubleValue];
        CLLocationDegrees longValue = [[locationsArray[i] objectForKey:@"logitude"] doubleValue];
        CLLocation* location = [[CLLocation alloc]initWithLatitude:latValue longitude:longValue];
        [tempLocationsArr addObject:location];

        NSArray* sortLocationArry = [tempLocationsArr sortedArrayUsingComparator:^NSComparisonResult(CLLocation* location1, CLLocation* location2) {
            CLLocationDistance distA = [location1 distanceFromLocation:currentLocation];
            CLLocationDistance distB = [location2 distanceFromLocation:currentLocation];
            if (distA < distB) {
                return NSOrderedAscending;
            } else if ( distA > distB) {
                return NSOrderedDescending;
            } else {
                return NSOrderedSame;
            }
        }];

      //ArrayAfterSorting is another mutable Array to Store Sorting Data
        [ArrayAfterSorting removeAllObjects];
        [sortLocationArry enumerateObjectsUsingBlock:^(CLLocation* location, NSUInteger idx, BOOL *stop) {
            NSMutableDictionary *tempDict = [[NSMutableDictionary alloc]init];
            [tempDict setObject:[NSString stringWithFormat:@"%f",location.coordinate.latitude] forKey:@"latitude"];
            [tempDict setObject:[NSString stringWithFormat:@"%f",location.coordinate.longitude] forKey:@"logitude"];
            [ArrayAfterSorting addObject:tempDict];


        }];
     NSLog(@"sortedArray : %@", ArrayAfterSorting);
    }

}