Question

我正在尝试使用NSURLConnection的示例项目。

 import Foundation
 import UIKit
    class loginVC: ViewController, UITextFieldDelegate, NSURLConnectionDelegate, NSURLConnectionDataDelegate{
        var webData: NSMutableData!

        override func viewDidLoad() {
            super.viewDidLoad()
            webData = NSMutableData()
            callWebService("testdentist@gmail.com", Password:"1")

        }

        func callWebService(userName:NSString, Password:NSString){

            var strURl: NSURL = NSURL .URLWithString("")
            var request: NSMutableURLRequest = NSMutableURLRequest(URL: strURl, cachePolicy:NSURLRequestCachePolicy.ReloadIgnoringLocalCacheData, timeoutInterval:60.0)
            var postString: NSString = ""
            postString = postString.stringByAppendingFormat("username=%@&password=%@", userName,Password)
            request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding)
            request.HTTPMethod = ""
            var connection: NSURLConnection = NSURLConnection(request: request, delegate:self)
            connection.start()
        }

        //NSURLConnection webservice
        func connection(connection: NSURLConnection!, didReceiveResponse response: NSURLResponse!){
           // webData.length = 0
            println("response")
        }

        func connection(connection: NSURLConnection!, didReceiveData data: NSData!){
           println(data.length)
            webData .appendData(data)
        }

        func connection(connection: NSURLConnection, didFailWithError error: NSError!){
            println("error in connection")
        }

        func connectionDidFinishLoading(connection: NSURLConnection!){

            var response: NSString = NSString(data: webData, encoding: NSUTF8StringEncoding)

            println("response:\(response)")
            if response != ""{

            }

        }
        func connection(connection: NSURLConnection, didReceiveAuthenticationChallenge challenge: NSURLAuthenticationChallenge!){
            var authentication: NSURLCredential = NSURLCredential.credentialWithUser("", password:"", persistence: NSURLCredentialPersistence.ForSession)
        }  
    }

似乎所有代表都被调用，除了didReceiveAuthenticationChallenge委托方法。我错过了什么。任何帮助将不胜感激。谢谢提前

Answer 1

对于iOS 8及更高版本，您必须实施connection(_:willSendRequestForAuthenticationChallenge:)。在iOS8中不调用connection:didReceiveAuthenticationChallenge:，仅在较旧的操作系统中调用NSURLAuthenticationChallengeSender protocol。

因此，要在iOS8及更高版本中提供身份验证，请实现上述方法，并且必须调用其中一个质询 - 响应方法（useCredential:forAuthenticationChallenge: continueWithoutCredentialForAuthenticationChallenge: cancelAuthenticationChallenge: performDefaultHandlingForAuthenticationChallenge: rejectProtectionSpaceAndContinueWithChallenge:）：

didReceiveAuthenticationChallenge

didFailWithError是NSURLConnectionDelegate上的方法，而其他方法（{{1}}除外）都是NSURLConnectionDataDelegate方法。您是否在控制器中实现了这两种协议？如果您发布了所有课程代码，这可能会有所帮助。

Answer 2

我认为问题不在于新Swift 3.0的问题。

我有一个类似的问题，一个代码定期在xcode7 / ios7-8-9 / Swift 2.2下工作

迁移产生了：

 func urlSession(_ session: URLSession, didReceive challenge: URLAuthenticationChallenge, completionHandler: (Foundation.URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {

... }

但不起作用。

手写重写：

func urlSession(_: URLSession,
                didReceive challenge: URLAuthenticationChallenge,
                completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {


}

现在它开始工作了。我的两分钱。

didReceiveAuthenticationChallenge委托没有在Swift中调用

2 个答案: