ios - 如何将 header 添加到 dataTaskWithUrl？

Question

我有一个dataTaskWithUrl:

        var headers: NSDictionary = ["X-Mashape-Key": "my-secret-key" , "Accept" : "application/json"]
        var stringUrl = "https://restcountries-v1.p.mashape.com/all"
        stringUrl = stringUrl.stringByReplacingOccurrencesOfString(" ", withString: "+")
        let url = NSURL(string: stringUrl)
        let session = NSURLSession.sharedSession()
        let task = session.dataTaskWithURL(url!, completionHandler: { (data, response, error) -> Void in

        if let jsonResult = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil) as? NSDictionary{

           println(jsonResult)

        }else{
            println("error")
        }

      })

       task.resume()

我想为我的任务添加标题。

换句话说，我想将此代码转换为 swift:

NSDictionary *headers = @{@"X-Mashape-Key": @"my-secret-key", @"Accept": @"application/json"};
UNIUrlConnection *asyncConnection = [[UNIRest get:^(UNISimpleRequest *request) {
  [request setUrl:@"https://restcountries-v1.p.mashape.com/all"];
  [request setHeaders:headers];
}] asJsonAsync:^(UNIHTTPJsonResponse *response, NSError *error) {
  NSInteger code = response.code;
  NSDictionary *responseHeaders = response.headers;
  UNIJsonNode *body = response.body;
  NSData *rawBody = response.rawBody;
}];

我是数据请求的新手。我不了解 Objective C 代码，但在查看该代码时我做出了猜测。我需要使用标题，因为如果我只是尝试去 https://restcountries-v1.p.mashape.com/all直接，我得到一个错误。我从这个网站收到了 objective-c 代码:https://www.mashape.com/fayder/rest-countries-v1 .非常感谢在正确方向上提供的任何帮助。

谢谢

Answer 1

更新 Swift 4+:

let httpUrl = "http://...."
guard let url = URL(string: httpUrl) else {
    return
}
var request = URLRequest(url: url)
request.setValue("application/json", forHTTPHeaderField: "Accept")
request.setValue("my-secret-key", forHTTPHeaderField: "X-Mashape-Key")
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in

}
task.resume()

旧帖:

如果要使用dataTask

    var stringUrl = "https://restcountries-v1.p.mashape.com/all"
    stringUrl = stringUrl.stringByReplacingOccurrencesOfString(" ", withString: "+")
    let url = NSURL(string: stringUrl)
    let session = NSURLSession.sharedSession()
    var muableRequest = NSMutableURLRequest(URL: url!)
    muableRequest.setValue("application/json", forHTTPHeaderField: "Accept")
    muableRequest.setValue("my-secret-key", forHTTPHeaderField: "X-Mashape-Key")

    let task = session.dataTaskWithRequest(muableRequest, completionHandler: { (data, response, error) -> Void in
        if let jsonResult = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil){

            println(jsonResult)

        }

    })
    task.resume()