使用键值对在Swift中进行POST请求

我必须提出一个请求，并在Swift中收到回复。 我需要以键值对格式向请求添加值，然后我得到一个答案（0或1）。 我不知道如何将Dictionary值添加到请求中。

var url = NSURL(string:"www.myurl.com") var request = NSMutableURLRequest(URL: url!) request.HTTPMethod = "POST" var params = ["email":"\(txtEmail.text)", "passw":"\(txtPassword.text)"] as Dictionary let data = //HOW CAN I LOAD THE DATA TO THE HTTPBODY REQUEST?? request.HTTPBody = data var connection = NSURLConnection(request: request, delegate: self, startImmediately: false) 

提前致谢。

Answer 1

解决scheme。 感谢@Rob：

 func loginRequest(url:String, withParams params: [String: String?], postCompleted : (succeeded: Bool, msg: String) -> ()){ var request = NSMutableURLRequest(URL: NSURL(string: url)!) var session = NSURLSession.sharedSession() request.HTTPMethod = "POST" var err: NSError? var bodyData = "" for (key,value) in params{ if (value == nil){ continue } let scapedKey = key.stringByAddingPercentEncodingWithAllowedCharacters( .URLHostAllowedCharacterSet())! let scapedValue = value!.stringByAddingPercentEncodingWithAllowedCharacters( .URLHostAllowedCharacterSet())! bodyData += "\(scapedKey)=\(scapedValue)&" } request.HTTPBody = bodyData.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true) var task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in let dataString = NSString(data: data, encoding: NSUTF8StringEncoding) postCompleted(succeeded: true, msg: dataString!) }) task.resume() } 

然后，我调用函数，我可以知道用户是否正确：

  self.loginRequest("http:myurl.com", withParams: ["email":"email","passw":"passw"]) { (succeeded: Bool, msg: String) -> () in if(succeeded) { if msg == "0" { //Incorrect data... } else { //The login it's ok... } } } 

Answer 2

更新了Swift 4 +小改进的代码。 基于@imj的工作。

 /// Converts the dictionary to key values func convertToParameters(_ params: [String: String?]) -> String { var paramList: [String] = [] for (key, value) in params { guard let value = value else { continue } guard let scapedKey = key.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed) else { print("Failed to convert key \(key)") continue } guard let scapedValue = value.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed) else { print("Failed to convert value \(value)") continue } paramList.append("\(scapedKey)=\(scapedValue)") } return paramList.joined(separator: "&") }