你可以使用Just，一个python-requests风格的HTTP库。

使用Just发送HTTP请求的示例:

// synchronous GET request with URL query a=1
let r = Just.get("https://httpbin.org/get", params:["a":1])

// asynchronous POST request with form value and file uploads
Just.post(
    "http://justiceleauge.org/member/register",
    data: ["username": "barryallen", "password":"ReverseF1ashSucks"],
    files: ["profile_photo": .URL(fileURLWithPath:"flash.jpeg", nil)]
) { (r)
    if (r.ok) { /* success! */ }
}

在这两种情况下，可以通过类似于python-request的方式访问请求r的结果:

r.ok            // is the response successful?
r.statusCode    // status code of response
r.content       // response body as NSData?
r.text          // response body as text?
r.json          // response body parsed by NSJSONSerielization

你可以在这个操场上找到更多的例子

在操场上以同步模式使用这个库是Swift中最接近cURL的东西。

我调用json登录按钮点击

@IBAction func loginClicked(sender : AnyObject) {

    var request = NSMutableURLRequest(URL: NSURL(string: kLoginURL)) // Here, kLogin contains the Login API.

    var session = NSURLSession.sharedSession()

    request.HTTPMethod = "POST"

    var err: NSError?
    request.HTTPBody = NSJSONSerialization.dataWithJSONObject(self.criteriaDic(), options: nil, error: &err) // This Line fills the web service with required parameters.
    request.addValue("application/json", forHTTPHeaderField: "Content-Type")
    request.addValue("application/json", forHTTPHeaderField: "Accept")

    var task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in
        var strData = NSString(data: data, encoding: NSUTF8StringEncoding)
        var err1: NSError?
        var json2 = NSJSONSerialization.JSONObjectWithData(strData.dataUsingEncoding(NSUTF8StringEncoding), options: .MutableLeaves, error:&err1 ) as NSDictionary

        println("json2 :\(json2)")

        if(err) {
            println(err!.localizedDescription)
        }
        else {
            var success = json2["success"] as? Int
            println("Success: \(success)")
        }
    })

    task.resume()
}

在这里，我为参数创建了一个单独的字典。

var params = ["format":"json", "MobileType":"IOS","MIN":"f8d16d98ad12acdbbe1de647414495ec","UserName":emailTxtField.text,"PWD":passwordTxtField.text,"SigninVia":"SH"]as NSDictionary
    return params
}

// You can add your own sets of parameter here.

我已经完成了HTTP请求两种方法GET和POST与JSON解析的方式:

在viewDidLoad ():

override func viewDidLoad() {
super.viewDidLoad()

    makeGetRequest()
    makePostRequest()

}

func makePostRequest(){

    let urlPath: String = "http://www.swiftdeveloperblog.com/http-post-example-script/"
    var url: NSURL = NSURL(string: urlPath)!
    var request: NSMutableURLRequest = NSMutableURLRequest(URL: url)

    request.HTTPMethod = "POST"
    var stringPost="firstName=James&lastName=Bond" // Key and Value

    let data = stringPost.dataUsingEncoding(NSUTF8StringEncoding)

    request.timeoutInterval = 60
    request.HTTPBody=data
    request.HTTPShouldHandleCookies=false

    let queue:NSOperationQueue = NSOperationQueue()

    NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue(), completionHandler:{ (response:NSURLResponse!, data: NSData!, error: NSError!) -> Void in
        var error: AutoreleasingUnsafeMutablePointer<NSError?> = nil
        let jsonResult: NSDictionary! = NSJSONSerialization.JSONObjectWithData(data, options:NSJSONReadingOptions.MutableContainers, error: error) as? NSDictionary

         if (jsonResult != nil) {
            // Success
           println(jsonResult)

           let message = jsonResult["Message"] as! NSString

           println(message)
         }else {
            // Failed
            println("Failed")
        }

    })

}

func makeGetRequest(){
    var url : String = "http://api.androidhive.info/contacts/"
    var request : NSMutableURLRequest = NSMutableURLRequest()
    request.URL = NSURL(string: url)
    request.HTTPMethod = "GET"
    request.timeoutInterval = 60

    NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue(), completionHandler:{ (response:NSURLResponse!, data: NSData!, error: NSError!) -> Void in
        var error: AutoreleasingUnsafeMutablePointer<NSError?> = nil
        let jsonResult: NSDictionary! = NSJSONSerialization.JSONObjectWithData(data, options:NSJSONReadingOptions.MutableContainers, error: error) as? NSDictionary

        if (jsonResult != nil) {
            // Success
            println(jsonResult)

            let dataArray = jsonResult["contacts"] as! NSArray;

            for item in dataArray { // loop through data items

                let obj = item as! NSDictionary

                for (key, value) in obj {

                    println("Key: \(key) - Value: \(value)")

                    let phone = obj["phone"] as! NSDictionary;

                    let mobile = phone["mobile"] as! NSString
                    println(mobile)
                    let home = phone["home"] as! NSString
                    println(home)
                    let office = phone["office"] as! NSString
                    println(office)
                }
            }

        } else {
            // Failed
            println("Failed")
        }

    })
}

Done

答:吻

URLSession.shared.dataTask(with: URL(string: "https://google.com")!) {(data, response, error) in
    print(String(data: data!, encoding: .utf8))
}.resume()

更新:Xcode 13.0和Swift 5+

获取HTTP请求

let url = URL(string: "URL HERE")! //PUT Your URL
        var request = URLRequest(url: url)
        request.httpMethod = "GET"
        let task = URLSession.shared.dataTask(with: request) { data, response, error in
            guard let safeData = data,
                  let response = response as? HTTPURLResponse,
                  error == nil else {                                              // check for fundamental networking error
                      print("error", error ?? "Unknown error")
                      delegate?.onError(error!)
                      return
                  }
            
            guard (200 ... 299) ~= response.statusCode else {                    // check for http errors
                print("statusCode should be 2xx, but is \(response.statusCode)")
                print("response = \(response)")
                return
            }
            
            let responseString = String(data: safeData, encoding: .utf8)
            print("Response String = \(responseString)")
        }
        
        task.resume()

//这是一个对我有用的例子

//发送请求到服务器的Swift函数

func insertRecords()
{



    let usrID = txtID.text
    let checkin = lblInOut.text
    let comment = txtComment.text



    // The address of the web service
    let urlString = "http://your_url/checkInOut_post.php"

    // These are the keys that your are sending as part of the post request
    let keyValues = "id=\(usrID)&inout=\(checkin)&comment=\(comment)"




    // 1 - Create the session by getting the configuration and then
    //     creating the session

    let config = NSURLSessionConfiguration.defaultSessionConfiguration()
    let session = NSURLSession(configuration: config, delegate: nil, delegateQueue: nil)


    // 2 - Create the URL Object

    if let url = NSURL(string: urlString){


        // 3 - Create the Request Object

        var request  = NSMutableURLRequest(URL: url)
        request.HTTPMethod = "POST"

        // set the key values
        request.HTTPBody = keyValues.dataUsingEncoding(NSUTF8StringEncoding);


        // 4 - execute the request

        let taskData = session.dataTaskWithRequest(request, completionHandler: {

            (data:NSData!, response:NSURLResponse!, error:NSError!) -> Void in

            println("\(data)")

            // 5 - Do something with the Data back

            if (data != nil) {

                // we got some data back
                println("\(data)")

                let result = NSString(data: data , encoding: NSUTF8StringEncoding)
                println("\(result)")

                if result == "OK" {

                    let a = UIAlertView(title: "OK", message: "Attendece has been recorded", delegate: nil, cancelButtonTitle: "OK")

                    println("\(result)")

                    dispatch_async(dispatch_get_main_queue()) {


                    a.show()


                    }


                } else {
                  // display error and do something else

                }


            } else

            {   // we got an error
                println("Error getting stores :\(error.localizedDescription)")

            }


        })

        taskData.resume()



    }


}

PHP代码来获取键值

$empID = $_POST['id'];

$inOut = $_POST['inout'];

$comment = $_POST['comment'];