Objective C post variables as well as files - objective-c

Question

I am attempting to write a method/function in objective c to post data to an online php script. All is going well, Its successfully uploads as many files as I provide it with but I cannot figure out to send variables along with these files. I've spent hours now looking through this site and I am unable to find an example that posts files as well as variables.
NSURL * postURL = [NSURL URLWithString:serverURL];
NSString * contentBoundary = #"-14737809831466499882746641449";
NSString * contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#", contentBoundary];
// Build Request
NSMutableURLRequest * urlRequest = [NSMutableURLRequest requestWithURL:postURL];
[urlRequest setHTTPMethod:#"POST"];
[urlRequest addValue:contentType forHTTPHeaderField: #"Content-Type"];
NSMutableData * postBody = [NSMutableData data];
NSMutableString * postString = [NSMutableString stringWithFormat:#""];
for(NSString * key in dataArray) [postString appendString:[NSString stringWithFormat:#"%#=%#&", key, [dataArray objectForKey:key]]];
[postString deleteCharactersInRange:NSMakeRange([postString length] -1, 1)]; // Trim trailing ampersand from string
NSData * postData = [postString dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:NO];
[postBody appendData:[NSData dataWithData:postData]];
if(attachments != nil){
for(NSString * filePath in attachments){
NSString * fileName = [filePath lastPathComponent];
NSData * attachedFile = [NSData dataWithContentsOfFile:filePath];
[postBody appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n", contentBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithFormat:#"Content-Disposition:form-data;name=\"userfile[]\"; filename=\"%#\"\r\n", fileName] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithFormat:#"Content-Type:application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[NSData dataWithData:attachedFile]];
[postBody appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n", contentBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
}
}
NSString * postLength = [NSString stringWithFormat:#"%d", [postBody length]];
[urlRequest setValue:postLength forHTTPHeaderField:#"Content-Length"];
[urlRequest setHTTPBody:postBody];
Any help would be appreciated.

Answer 1

You can try appending the variable's values to the posted data in the following manner :
// text parameter
[postbody appendData:[[NSString stringWithFormat:#"--%#\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"applicationId\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
NSString *parameterValue1=[dict objectForKey:#"applicationId"];
[postbody appendData:[parameterValue1 dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[#"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
Hope that works for you. Above code is just an example of the parameter sent with the file upload.