Uploading File to Witnessio

sample.c

NSString *urlString = [NSString stringWithFormat:@"http://api.witness.io/1/user/%@/files",idValue];               
ASIFormDataRequest *request = [[ASIFormDataRequest alloc] initWithURL:[NSURL URLWithString:urlString]];

[request addRequestHeader:@"X-WITNESS-TOKEN" value:@"PUT_TOKEN_HERE"];
[request setRequestMethod:@"PUT"];
[request setPostValue:@"My Good file" forKey:@"title"];
[request setPostValue:@"1" forKey:@"format"];
[request setPostValue:@"360" forKey:@"bearing"];
[request setPostValue:@"-90" forKey:@"latitude"];
[request setPostValue:@"90" forKey:@"longitude"];
[request setPostValue:@"0" forKey:@"altitude"];
                
[request setPostValue:@"0" forKey:@"altitude"];
                
[request setPostValue:"" forKey:@"route"];
                
[request setFile:[[NSBundle mainBundle] pathForResource:@"screen1" ofType:@"png"] forKey:@"file"];
                
[request startSynchronous];
NSError *error = [request error];
if (!error) {
   NSString *response = [request responseString];
   int statusCode = [request responseStatusCode];
                
   NSLog(@"Status code :: %d",statusCode);
   NSString *statusMessage = [request responseStatusMessage];
   NSLog(@"Status Message :: %@",statusMessage);
}