我正在开发一个应用程序,它具有登录屏幕,这对我来说是第一个。在遵循为此提供的教程的不同网站之后,我制作了一个LoginService ViewController,它可以帮助您登录应用程序。Xcode - Swift 2.0:通过NSJSONSerialization调用“额外参数”错误
下面是我在这个视图控制器使用的代码的一部分:
// MARK: Private Methods
private func exchangeTokenForUserAccessTokenWithCompletionHandler(username: String, password: String, completion: (OAuthInfo?, error: String?) ->()) {
let path = "/oauthfake/token/"
let url = ConnectionSettings.apiURLWithPathComponents(path)
let request = NSMutableURLRequest(URL: url)
request.HTTPMethod = "POST"
var params = "client_id=\(ConnectionSettings.clientId)&client_secret=\(ConnectionSettings.clientSecret)&grant_type=password&login=\(username)&password=\(password)"
var err: NSError?
request.HTTPBody = params.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)
request.addValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
let task = session.dataTaskWithRequest(request) {data, response, error -> Void in
var err: NSError?
var json = NSJSONSerialization.JSONObjectWithData(data, options: .MutableLeaves, error: &err) as? NSDictionary
if (err != nil) {
// Something went wrong, log the error to the console.
print(err!.localizedDescription)
let jsonStr = NSString(data: data!, encoding: NSUTF8StringEncoding)
print("Something went wrong: '\(jsonStr)")
completion(nil, error: err?.localizedDescription)
} else {
if let parseJSON = json {
if let token = parseJSON.valueForKey("access_token") as? String {
if var issuedAt = parseJSON.valueForKey("issued_at") as? String {
if var tokenExpiresIn = parseJSON.valueForKey("expires_in") as? String {
if var refreshTokenIssuedAt = parseJSON.valueForKey("refresh_token_issued_at") as? String {
if let refreshToken = parseJSON.valueForKey("refresh_token") as? String {
if var refreshTokenExpiresIn = parseJSON.valueForKey("refresh_token_expires_in") as? String {
if let refreshCount = parseJSON.valueForKey("refresh_count") as? String {
let epochIssuedAt:Double = (issuedAt as NSString).doubleValue/1000.0
let epochRefreshTokenIssuedAt:Double = (refreshTokenIssuedAt as NSString).doubleValue/1000.0
let oauthInfo = OAuthInfo(issuedAt: epochIssuedAt, refreshTokenIssuedAt: epochRefreshTokenIssuedAt, tokenExpiresIn: (tokenExpiresIn as NSString).doubleValue, refreshToken: refreshToken, token: token, refreshTokenExpiresIn: (refreshTokenExpiresIn as NSString).doubleValue, refreshCount: (refreshCount as NSString).integerValue)
completion(oauthInfo, error: err?.localizedDescription)
我super.init似乎做工精细(上面没有特色),以及该代码的休息这个文件,但我得到一个错误的阅读“额外的参数‘错误’呼叫”在这条线:
var json = NSJSONSerialization.JSONObjectWithData(data, options: .MutableLeaves, error: &err) as? NSDictionary
我已经收集是雨燕2.0处理错误不同,以什么我已经习惯了。我知道这个版本的Swift使用try,let和catch代码来查找错误。我的问题是我以前没有使用过这些类型的代码,并且不确定如何在这种特殊情况下使用它们。
感谢您的反馈意见,看看您如何布置语法非常有帮助!如果可以问(我还在学习这个,对不起),我想确保我知道我应该把try try catch代码与我在NSJSONSerialization错误中的行相比。 –
@ R.Osolinski:你想比较两个NSJSONSerialization吗? – Donal