Posting data with image to server in iOS application - ios

Question

I am successfully posting UIImage to server, but I need to post a NSString with the UIImage.
Below is the code with which I tried to post UIImage to server.
selectedItem is the array where I am storing all selected UIImage from gallery.
The line which I have commented is what I need to send to server.
for (int i=0; i<[selectedItem count]; i++) {
//NSString *post =[[NSString alloc] initWithFormat:#"mid:%#",mid];
NSData *theData = UIImagePNGRepresentation([selectedItem objectAtIndex:i]);
NSString *urlString = #"http://retailertoolkit.com/RTK/upload.php";
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"POST"];
NSString *boundary = [NSString stringWithString:#"---------------------------14737809831466499882746641449"];
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#",boundary];
[request addValue:contentType forHTTPHeaderField: #"Content-Type"];
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",mid] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"Content-Disposition: form-data; name=\"file\"; filename=\"iphoneimage.png\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:theData]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:body];
NSURLConnection *connection=[[NSURLConnection alloc]initWithRequest:request delegate:self];
if(connection) {
} else {
}
}

Answer 1

Every parameter of the request has to be added as you are adding the image to the request.
Try replacing [body appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",mid] dataUsingEncoding:NSUTF8StringEncoding]]; with
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"Content-Disposition: form-data; name=\"{parameter_name}\";\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[mid dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
Where parameter_name should be your mid string's key (parameter name). Good Luck!