Mashape API objective-C样板代码出现错误

Question

我正在尝试使用来自Mashape的API。当我测试端点(JSON响应)时，一切正常，但它们给出的objective-c应用程序就绪的代码示例不起作用，我得到以下错误：

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这是我的代码：

- (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];
}

有什么办法可以解决这个问题吗？

谢谢!

Answer 1

code examples显示的实际上是代码应该是什么样子：

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];

或者，也许是这个：

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];