upload photo to photo album on Facebook using iOS sdk - ios

Question

I am trying to create a new album on a user's Facebook account, and upload images to that album. I have succeeded to create an album, but when I start uploading images to it only the last image selected gets uploaded the number of times the images I have selected.
This is my piece of code to create a Facebook album and upload images to it
- (void)createFacebookAlbum {
NSMutableDictionary* parameters = [NSMutableDictionary dictionary];
[parameters setObject:albumNAME forKey:#"name"];
[parameters setObject:#"Test message" forKey:#"message"];
FBRequest* request = [FBRequest requestWithGraphPath:#"me/albums" parameters:parameters HTTPMethod:#"POST"];
NSLog(#"creating facebook album");
FBRequestConnection *connection = [[FBRequestConnection alloc] init];
[connection addRequest:request
completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
if (!error) {
albumId = [result objectForKey:#"id"];
NSLog(#"OK %#", albumId);
[self publishContentToAlbum:[result objectForKey:#"id"]];
}
else {
NSLog(#"Error: %#",error.userInfo);
}
}];
[connection start];
}
-(void)uploadBulkPhotosToAlbum:(NSMutableArray *)photoArray albumId:(NSMutableArray *)albumId{
FBRequestConnection *connection = [[FBRequestConnection alloc] init];
NSString *graphPath = [NSString stringWithFormat:#"%#/photos",albumId];
NSMutableString *jsonFormat = [[NSMutableString alloc] init];
[jsonFormat setString:#"["];
for (int i = 0; i < (NSUInteger *)countere; i++)
{
if (i != 0)
{
[jsonFormat appendString:#","];
}
NSString *fileName = [NSString stringWithFormat:#"file%d",i];
NSString *jsonRequest = [NSString stringWithFormat:#"{ \"method\": \"POST\", \"relative_url\": \"%#\", \"attached_files\": \"%#\" }",graphPath,fileName];
[jsonFormat appendString:[NSString stringWithFormat:#" %#",jsonRequest]];
}
[jsonFormat appendString:#" ]"];
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:jsonFormat,#"batch",nil];
for (int i = 0; i <(NSUInteger *)countere; i++)
{
NSString *fileName = [NSString stringWithFormat:#"file%d",i];
NSData *data = UIImagePNGRepresentation([photoArray objectAtIndex:i]);
[params setObject:data forKey:fileName];
}
FBRequest *request1 = [FBRequest requestWithGraphPath:graphPath
parameters:params
HTTPMethod:#"POST"];
[connection addRequest:request1
completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
if (!error) {
NSLog(#"Photo uploaded successfuly! %#",result);
} else {
NSLog(#"Photo uploaded failed :( %#",error.userInfo);
}
}];
[connection start];
}
Can anyone help me to solve my problem?
Thanks for the reply.