wie man mehrere Bilder hochladen auf server ios?

Ich versuche zum hochladen von Bild Aus meinem IOS-Gerät zum server. beim hochladen von Bild-Datei zu server ist es erfolgreich hochgeladen auf meinen server. ich will das hochladen mehrerer image-Dateien auf den server wie kann ich das tun.

//COnvert Image to NSData
NSData *dataImage = UIImageJPEGRepresentation([UIImage imageNamed:@"icon.png"], 1.0f);

//set your URL Where to Upload Image
NSString *urlString = @"http://XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/imgupload.php";

//set your Image Name
NSString *filename = @"icon";

//Create 'POST' MutableRequest with Data and Other Image Attachment.
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"];
NSMutableData *postbody = [NSMutableData data];
[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
 [postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.png\"\r\n",filename] dataUsingEncoding:NSUTF8StringEncoding]];    [postbody appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[NSData dataWithData:dataImage]];
[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:postbody];

//Get Response of Your Request
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *responseString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(@"Response  %@",responseString);

Muliple Bilder hochladen versucht-code

  -(void)uploadImageToServer:(NSArray*)arrUploadData withTreatmentDetails:(NSDictionary *)dictArguments url:(NSString*)url
  {
//COnvert Image to NSData


//set your URL Where to Upload Image
NSString *urlString = @"http://XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/imgupload.php";

//set your Image Name


//Create 'POST' MutableRequest with Data and Other Image Attachment.
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"];
NSMutableData *postbody = [NSMutableData data];
for (int i=0; i<[arrUploadData count]; i++)
{
    NSData *dataImage = [[arrUploadData objectAtIndex:i] valueForKey:@"photographyData"];
    NSString *filename = [[arrUploadData objectAtIndex:i] valueForKey:@"photographyimagename"];
    if (dataImage)
    {
        [postbody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.png\"\r\n",filename] dataUsingEncoding:NSUTF8StringEncoding]];    [postbody appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
        [postbody appendData:[NSData dataWithData:dataImage]];
        [postbody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    }
}
[request setHTTPBody:postbody];
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *responseString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(@"Response  %@",responseString);

}