ios - 在 web 服务代码中解包 Optional 值时意外发现 nil

Question

我已经绑定(bind)了我的登录操作，并尝试调用 restfull webservice。

下面是我的代码:

 @IBAction func loginAction(sender: AnyObject) {

    println(emailTextField.text)
    println(pwdTextField.text)

  let plainData = emailTextField.text.dataUsingEncoding(NSUTF8StringEncoding)
  let base64String = plainData?.base64EncodedStringWithOptions(.allZeros)
  println(base64String)

    let plainDataPwd = pwdTextField.text.dataUsingEncoding(NSUTF8StringEncoding)
    let base64StringPwd = plainDataPwd?.base64EncodedStringWithOptions(.allZeros)
    println(base64StringPwd)

   var urlPath = "http://inspect.dev.cbre.eu/SyncServices/api/jobmanagement/PlusContactAuthentication?email=\(base64String)&userPwd=\(base64StringPwd)"

     var url: NSURL! = NSURL(string: urlPath)
     var request: NSURLRequest = NSURLRequest(URL: url)
    var connection: NSURLConnection! = NSURLConnection(request: request,
        delegate: self,startImmediately: false)
     connection.start()
}

我在 web 服务中展开可选值时发现 nil

Answer 1

试试这段代码:

  @IBAction func login(sender: AnyObject) {

    println(txt1.text)
    println(txt2.text)
    let base64String : NSString = ""
    let base64StringPwd : NSString = ""

    if let plainData = txt1.text.dataUsingEncoding(NSUTF8StringEncoding){

    let base64String = plainData.base64EncodedStringWithOptions(.allZeros)
    println(base64String)

    }

    if  let plainDataPwd = txt2.text.dataUsingEncoding(NSUTF8StringEncoding){
    let base64StringPwd = plainDataPwd.base64EncodedStringWithOptions(.allZeros)
    println(base64StringPwd)

    }

    var urlPath : NSString? = "http://inspect.dev.cbre.eu/SyncServices/api/jobmanagement/PlusContactAuthentication?email=\(base64String)&userPwd=\(base64StringPwd)"

    var url = NSURL(string: urlPath!)
    if let url1 = url{

        var request: NSURLRequest = NSURLRequest(URL: url1)
        var connection: NSURLConnection! = NSURLConnection(request: request,
            delegate: self,startImmediately: false)
        connection.start()
        }

    }
}