Swift/iOS8顺序HTTP请求

不久前，我编写了一些代码，使用用户输入的凭据登录到一个网站，然后导航到某个页面以解析那里的信息（使用

nsurlconnectionelegate

）

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一般的想法是发出一个初始请求，然后从委托方法

connectiondFinishLoading

发送其他请求。有没有一种更干净/更好的方法来进行这种顺序调用？

因此我使用Alamofire框架（AFNetworking的新版本）进行了此操作：

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使用AFNetworking之类的框架，将HTTP请求逻辑与应用程序逻辑分离，在请求完成时为您提供一个简单的块回调。然后，您可以通过在嵌套的完成块中发出新请求来链接请求。在swift中，函数是闭合的，链接将非常干净。在这种情况下，委托绝对不是解决方案。你为什么要按顺序打电话？您需要将第一个请求中的数据重新用于第二个请求吗？如果不是的话，你可以直接发出parallels请求？好吧，我真正需要的是验证登录名。我正在调查alamofire，新的AFN网络。谢谢你的回复。

func startConnection() {
    var url = NSURL(string:"https://www.website.com/psp/ps/?cmd=login&languageCd=ENG")
    var request = NSMutableURLRequest(URL: url!)
    request.HTTPMethod = "POST"

    let data = (dataString as NSString).dataUsingEncoding(NSUTF8StringEncoding)

    request.HTTPBody = data

    request.setValue("\(data!.length)", forHTTPHeaderField: "Content-Length")
    request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
    request.setValue("text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8", forHTTPHeaderField: "Accept")

    connection1 = NSURLConnection(request: request, delegate: self, startImmediately: false)!

    connection1.start()
}

func connectionDidFinishLoading(connection: NSURLConnection) {

    if (connection == connection1) {
        let url = NSURL(string: "https://www.nexturl.com")
        var request = NSMutableURLRequest(URL: url!)
        connection2 = NSURLConnection(request: request, delegate: self, startImmediately: false)!
        connection2.start()

    }

    if (connection == connection2) {

        let url = NSURL(string: "https://www.nexturl.com")
        var request = NSMutableURLRequest(URL: url!)
        connection3 = NSURLConnection(request: request, delegate: self, startImmediately: false)!
        connection3.start()
    }

    if (connection == connection3) {
        let strData: NSString = NSString(data: responseData, encoding: NSUTF8StringEncoding)!
        parse(strData)


    }

}

    var loginRequest = NSMutableURLRequest(URL: NSURL(string:"login.com")!)
    loginRequest.HTTPMethod = "POST"

    loginRequest.HTTPBody = ("timezoneOffset=-600&userid1=\(username)&userid=\(username.capitalizedString)&pwd=\(pass)&x=31&y=12" as NSString).dataUsingEncoding(NSUTF8StringEncoding)

    let manager = Alamofire.Manager.sharedInstance

    // Chain requests
    manager.request(loginRequest)
        .responseString{ (request, response, string, error) in
            if response!.statusCode == 500 {
                return Error.InternalServerError
            }
            else {

            manager.request(.GET, "www.redirect.com")
                .responseString { (request, response, string, error) in
                    println(string)
            }
        }
    }