Accessing arrays in another instance of a class objective c

I have a @property (nonatomic,retain) NSMutableArray *transfer_array; in .h file and in my .m I have

@synthesize transfer_array = _transfer_array;

- (id)init
{
    self = [super init];
    if(self) {
        self.transfer_array = [[NSMutableArray alloc] init];
    }
    return self;
}

and I add objects to the array in this function

- (id)display:(double)imageXX andY:(double)imageYY withName:(NSString *)namee{

    //if((self == [super init])){
    NSLog(@"````````````````````````````````````````````````````````");

    NSLog(@"imageX: %f",imageXX);
    NSLog(@"imageY: %f", imageYY);
    NSLog(@"name: %@", namee);

    labelPoi = [[Poi alloc] init];
    labelPoi.imageLocationX = imageXX;
    labelPoi.imageLocationY = imageYY;
    labelPoi.name = namee;
    [self.transfer_array addObject:labelPoi];

The objects add successfully bu whenever I try to access the array elements in another instance such as:

- (void)viewDidLoad{
    [super viewDidLoad];

    NSLog(@"transfer_array count: %lu",(unsigned long)self.transfer_array.count);

Then the array is empty.

Any help would be appreciated!