Upload Array of Images to the Node.js server in IOS - ios

Question

I am trying to upload multiple images to server in the form of array using NSURLConnection (multipart/form-data). But I am unable to send. Just one image is being sent to server even from the array of multiple images. I have tried many solutions, but nothing working for me. Server is written in Node.js.
NSString *first_name;
NSString *last_name;
NSString *image_name;
NSData *imageData;
//-- Convert string into URL
NSString *urlString = [NSString stringWithFormat:#"https://delta-homelab.com/api/order/test"];
NSMutableURLRequest *request =[[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"POST"];
NSString *boundary = #"14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#",boundary];
[request addValue:contentType forHTTPHeaderField: #"Content-Type"];
//-- Append data into posr url using following method
NSMutableData *body = [NSMutableData data];
NSArray *imagesArray = [NSArray arrayWithObjects:[NSData dataWithData:UIImagePNGRepresentation([UIImage imageNamed:#"Pin Code"])],
[NSData dataWithData:UIImagePNGRepresentation([UIImage imageNamed:#"Pin Code"])],
[NSData dataWithData:UIImagePNGRepresentation([UIImage imageNamed:#"Pin Code"])], nil];
NSData *images = [NSKeyedArchiver archivedDataWithRootObject:imagesArray];
NSMutableData *postData = [NSMutableData dataWithCapacity:[images length] + 512];
[postData setData:images];
//-- For Sending text
//-- "firstname" is keyword form service
//-- "first_name" is the text which we have to send
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"%#\"\r\n\r\n",#"firstname"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"%#",first_name] dataUsingEncoding:NSUTF8StringEncoding]];
//-- "lastname" is keyword form service
//-- "last_name" is the text which we have to send
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"%#\"\r\n\r\n",#"lastname"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"%#",last_name] dataUsingEncoding:NSUTF8StringEncoding]];
//-- For sending image into service (send as imagedata)
//-- "image_name" is file name of the image (we can set custom name)
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition:form-data; name=\"images\"; filename=\"%#\"\r\n",image_name] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[#"Content-Type: image/png\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// [body appendData:[NSData dataWithData:UIImagePNGRepresentation([UIImage imageNamed:#"Pin Code"])]];
[body appendData:postData];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
//-- Sending data into server through URL
[request setHTTPBody:body];
//-- Getting response form server
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
//-- JSON Parsing with response data
NSDictionary *result = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableContainers error:nil];
NSLog(#"Result = %#",result);