NSURLSession for sending multiple images by multiple urls - ios

Question

The below code i am using for sending multiple images along with the text. but only one image is saving in Web server. Here the problem is i need to get response from the first url and i've to assign it to the second url.
NSLog(#"PassedID%#",PassedUserId);
NSLog(#"integer=%#", [[NSUserDefaults standardUserDefaults] objectForKey:#"Person"]);
NSString *CategoryId=#"3";
NSString *imagename=#"ComparisonObject";
NSString *requestString =[NSString stringWithFormat:#"UserId=%#&CategoryId=%#&Continent=%#&Country=%#&City=%#&Gender=%#&ImageName=%#",PassedUserId,CategoryId,continentTextfield.text,countrytextfield.text,citytextfield.text,GenderText.text,imagename];
NSLog(#"%#",requestString);
NSString *url=[NSString stringWithFormat:#"http://192.168.2.4:98/UserImage.svc/InsertObjectImage?%#",requestString];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
[request setURL:[NSURL URLWithString:url]];
[request setHTTPMethod:#"POST"];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *uploadImage1 = [session dataTaskWithRequest:request completionHandler:^(NSData *data2, NSURLResponse *response, NSError *error) {
// Finish uploading image 1
// Get response and data to prepare to update image 2
NSString *boundary = #"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#", boundary];
[request setValue:contentType forHTTPHeaderField:#"Content-Type"];
NSData *data = UIImageJPEGRepresentation(chosenImage1, 0.2f);
[request addValue:#"image/JPEG" forHTTPHeaderField:#"Content-Type"];
NSMutableData *body = [NSMutableData data];
[body appendData:[NSData dataWithData:data]];
[request setHTTPBody:body];
NSData *returnData;
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(#"recievedData%#",receivedData);
NSString *imagename=#"ComparisonObject";
NSString *requestString1 =[NSString stringWithFormat:#"UserId=%#&ImageId=%#&=ImageName%#",PassedUserId,compareId,imagename];
NSLog(#"%#",requestString1);
NSString *url=[NSString stringWithFormat:#"http://192.168.2.4:98/UserImage.svc/UpdateObjectImage?%#",requestString1];
NSMutableURLRequest *request2 = [[NSMutableURLRequest alloc] init] ;
[request setURL:[NSURL URLWithString:url]];
[request setHTTPMethod:#"POST"];
NSURLSessionDataTask *uploadImage2 = [session dataTaskWithRequest:request2 completionHandler:^(NSData *data1, NSURLResponse *response, NSError *error) {
NSLog(#"recievedData%#",receivedData);
NSString *imagename=#"ComparisonObject";
NSString *requestString1 =[NSString stringWithFormat:#"UserId=%#&ImageId=%#&=ImageName%#",PassedUserId,compareId,imagename];
NSLog(#"%#",requestString1);
NSString *url=[NSString stringWithFormat:#"http://192.168.2.4:98/UserImage.svc/UpdateObjectImage?%#",requestString1];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
[request setURL:[NSURL URLWithString:url]];
[request setHTTPMethod:#"POST"];
NSString *boundary = #"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#", boundary];
[request setValue:contentType forHTTPHeaderField:#"Content-Type"];
NSData *data = UIImageJPEGRepresentation(chosenImage2, 0.2f);
[request addValue:#"image/JPEG" forHTTPHeaderField:#"Content-Type"];
NSMutableData *body = [NSMutableData data];
[body appendData:[NSData dataWithData:data]];
[request setHTTPBody:body];
NSData *returnData;
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
// Finish uploading image 2
}];
}];