Mashape API objective-C boilerplate code giving errors - xcode

Question

I am trying to use an API From Mashape.
When I test the endpoint (JSON response), things are working well,
but the objective-c app-ready code example they give is not working, I get the following errors:
This is my code:
- (IBAction)loadJson:(id)sender
{
NSDictionary* headers = [NSDictionary dictionaryWithObjectsAndKeys:#"xxxxxxxxx", #"X-Mashape-Authorization", nil];
NSDictionary* parameters = [NSDictionary dictionaryWithObjectsAndKeys:[NSURL URLWithString:#"<file url>"], #"files", #"", #"urls", nil];
HttpJsonResponse* response = [[Unirest post:^(BodyRequest* request) {
[request setUrl:#"https://lambda-face-recognition.p.mashape.com/detect"];
[request setHeaders:headers];
[request setParameters:parameters];
}] asJson];
}
Is there any way to solve this?
Thanks!

Answer 1

The code examples show this is actually what the code should look like:
NSDictionary* headers = [NSDictionary dictionaryWithObjectsAndKeys:#"application/json", #"accept", nil];
NSDictionary* parameters = [NSDictionary dictionaryWithObjectsAndKeys:#"value", #"parameter", #"bar", #"foo", nil];
HttpJsonResponse* response = [[Unirest postEntity:^(BodyRequest* request) {
[request setUrl:#"http://httpbin.org/post"];
[request setHeaders:headers];
// Converting NSDictionary to JSON:
[request setBody:[NSJSONSerialization dataWithJSONObject:headers options:0 error:nil]];
}] asJson];
Or, maybe this one:
NSDictionary* headers = [NSDictionary dictionaryWithObjectsAndKeys:#"application/json", #"accept", nil];
NSURL file = nil;
NSDictionary* parameters = [NSDictionary dictionaryWithObjectsAndKeys:#"value", #"parameter", file, #"file", nil];
HttpJsonResponse* response = [[Unirest post:^(MultipartRequest* request) {
[request setUrl:#"http://httpbin.org/post"];
[request setHeaders:headers];
[request setParameters:parameters];
}] asJson];