Status code 400 when converting Postman Request into Objective-C - objective-c

Question

I'm trying to upload an image to an API and then use the result. When using Postman, everything runs successfully. When I used the export feature to convert the code to Objective-C, I tried running it, but I'm getting a status code 400 (my parameters are invalid).
Here is the Postman request:
Here is my own code:
// Get image name
NSURL *refURL = [info valueForKey:UIImagePickerControllerReferenceURL];
PHFetchResult *result = [PHAsset fetchAssetsWithALAssetURLs:#[refURL] options:nil];
NSString *filename = [[result firstObject] filename];
// Get image file path and append file name onto it
NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
NSString *path = [NSTemporaryDirectory() stringByAppendingPathComponent:filename];
[imageData writeToFile:path atomically:YES];
NSDictionary *headers = #{ #"content-type": #"multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW",
#"Content-Type": #"multipart/form-data",
#"Accept": #"application/json",
#"Authorization": #"Token 60f6be2a21bdf731d86a8817b440a1afba692fed",
#"Cache-Control": #"no-cache",
#"Postman-Token": #"7d262730-0c7d-66dc-bbbb-43f40dbfe8ce" };
NSArray *parameters = #[ #{ #"name": #"task", #"value": #"dc9ef71a-b8a0-4a12-90fd-83d717cf887f" },
#{ #"name": #"image_file", #"fileName": path } ];
NSString *boundary = #"----WebKitFormBoundary7MA4YWxkTrZu0gW";
NSError *error;
NSMutableString *body = [NSMutableString string];
for (NSDictionary *param in parameters) {
[body appendFormat:#"--%#\r\n", boundary];
if (param[#"fileName"]) {
[body appendFormat:#"Content-Disposition:form-data; name=\"%#\"; filename=\"%#\"\r\n", param[#"name"], param[#"fileName"]];
[body appendFormat:#"Content-Type: %#\r\n\r\n", param[#"contentType"]];
[body appendFormat:#"%#", [NSString stringWithContentsOfFile:param[#"fileName"] encoding:NSASCIIStringEncoding error:&error]];
if (error) {
NSLog(#"%#", error);
}
} else {
[body appendFormat:#"Content-Disposition:form-data; name=\"%#\"\r\n\r\n", param[#"name"]];
[body appendFormat:#"%#", param[#"value"]];
}
}
[body appendFormat:#"\r\n--%#--\r\n", boundary];
NSData *postData = [body dataUsingEncoding:NSASCIIStringEncoding];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:#"https://api.vize.ai/v1/classify/"]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:10.0];
[request setHTTPMethod:#"POST"];
[request setAllHTTPHeaderFields:headers];
[request setHTTPBody:postData];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request
completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
NSLog(#"%#", error);
} else {
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response;
NSLog(#"%#", httpResponse);
}
}];
[dataTask resume];
(It's not shown here, but I'm trying to use an image that the user will select from an image picker.) Why am I getting a status code 400 and how can I get the correct result?