如何使用Alamofire完全禁用URLCache

在Swift中使用Xcode 7.3 iOS 9.2都没有那个可怕的Objective C我已经在这方面工作了一段时间并且现在已经三次绕过这个块了。 我在这里试过这篇文章并且它不起作用http://www.mzan.com/article/32199494-alamofire-how-remove-cache.shtml

我也尝试使用苹果文档，但这是如此糟糕，我无法理解是否。

所以我正在做的是对我的服务器进行两次Alamofire调用。 一个用于测试登录信息的凭据以查看输入是否正确。 第二种是下载并返回客户信息以供查看。 当我第一次打电话时，两者都工作正常。 问题是当我注销应用程序时，我清除了页面中的所有用户信息。 但是当我在同一个会话期间登录时，它会调用第一个，所以如果我输入了错误的用户名或密码，即使我第一次正确登录，它也会返回false。 但是当我下载客户数据时，它会在我第一次访问用户信息时不断下载旧信息。 它使用新的用户名和密码，但仍然下载旧的东西。

这是我的登录和注销function：

//MARK: ButtonControllers @IBAction func onLoginClick(sender: AnyObject) { errorMessageUI.text = "Checking Creditials" email = userNameInput.text! password = passwordInput.text! buildLoginUrl = checkLoginUrl + emailTag + email + passwordTag + password print(buildLoginUrl) print("Login Cred") checkLoginCredentials(buildLoginUrl) } @IBAction func onLogoutClick(sender: AnyObject) { //null out everything for logout email = "" password = "" self.loginInformation.setObject(self.email, forKey: "email") self.loginInformation.setObject(self.password, forKey: "password") self.loginInformation.synchronize() performSegueWithIdentifier("logoutSegue", sender: self) //self.view = LoginView } 

这就是alamofire的召唤

 //MARK: Check Credentials Method //Function to log into the server and retrive data func checkLoginCredentials(myUrl : String) { Alamofire.request(.GET, myUrl) .validate(statusCode: 200..<300) .responseString { response in print("Cred Success: \(response.result.isSuccess)") print("Cred Check: \(response.result.value)") //clear all url chache NSURLCache.sharedURLCache().removeAllCachedResponses() if response.result.value != nil { let checker : String = response.result.value! if checker.lowercaseString.rangeOfString("false") != nil { self.canILogin = false self.errorMessageUI.text = "Wrong username or Password try again" }else{ self.canILogin = true print("Downloading Json file for customer info") self.loadingImage.hidden = false self.downlaodCustomerinfo(self.customerInfoUrl, myUser: self.email, myPass: self.password) //defaults.setBool(textColorSwitch.on, forKey: "DarkText") self.loginInformation.setObject(self.email, forKey: "email") self.loginInformation.setObject(self.password, forKey: "password") self.loginInformation.synchronize() } print("Login? " + self.canILogin.description ?? "none" ) }else { //Stop the program from downloading anything to avoid crashes self.loadingImage.hidden = true print("I cannot download User Info") self.errorMessageUI.text = "A connection error occured" //set the json to be empty to avoid a crash //reset the json file incase there is anythig in it self.downloadJson = "" } } }//end of checkLoginCredentials function //MARK: Download Customer Infoamtion func downlaodCustomerinfo(myUrl : String, myUser : String, myPass : String) { //clear all url chache NSURLCache.sharedURLCache().removeAllCachedResponses() print("Username: " + myUser) print("Password: " + myPass) print("Download Url: " + myUrl ) print("Jsonfile before download: " + self.downloadJson) Alamofire.request(.GET, myUrl) .authenticate(user: myUser, password: myPass) .validate(statusCode: 200..<300) .responseString { response in //print("Success: \(response.result.isSuccess)") print("Info Download: \(response.result.value)") if response.result.value != nil{ self.downloadJson = response.result.value! print("Json file: " + self.downloadJson) self.parseCustomerInfo(self.downloadJson) }else { self.loadingImage.hidden = true print("I cannot download User Info") self.errorMessageUI.text = "A connection error occured" //set the json to be empty to avoid a crash self.downloadJson = "{}" } } }//end of download 

更新的代码：导致系统从Alamofire响应中返回false

  //Create a non-caching configuration. let config = NSURLSessionConfiguration.defaultSessionConfiguration() config.requestCachePolicy = .ReloadIgnoringLocalAndRemoteCacheData config.URLCache = nil //Create a manager with the non-caching configuration that you created above. let manager = Alamofire.Manager(configuration: config) print("Username for download: " + myUser) print("Password: " + myPass) manager.request(.GET, myUrl) .authenticate(user: myUser, password: myPass) .validate(statusCode: 200..<300) .responseString { response in //print("Success: \(response.result.isSuccess)") print("Info Download: \(response.result.value)") if response.result.value != nil{ self.downloadJson = response.result.value! print("Json file: " + self.downloadJson) self.parseCustomerInfo(self.downloadJson) }else { self.loadingImage.hidden = true print("I cannot download User Info") self.errorMessageUI.text = "A connection error occured" //set the json to be empty to avoid a crash self.downloadJson = "{}" } } }//end of downloadCustomer function 

Answer 1

你为什么不配置会话？ 如果正确配置会话，则不会进行缓存。

例：

 //Create a non-caching configuration. let config = NSURLSessionConfiguration.defaultSessionConfiguration() config.requestCachePolicy = .ReloadIgnoringLocalAndRemoteCacheData config.URLCache = nil //Allow cookies if needed. config.HTTPCookieStorage = NSHTTPCookieStorage.sharedHTTPCookieStorage() //Create a manager with the non-caching configuration that you created above. self.manager = Alamofire.Manager(configuration: config) //Examples of making a request using the manager you created: //Regular HTML GET request: self.manager.request(.GET, "https://stackoverflow.com") .validate(statusCode: 200..<300) .validate(contentType: ["text/html"]) .responseString { (response) in guard response.result.isSuccess else { print("Error: \(response.result.error)") return } print("Result: \(response.result.value)") } //JSON GET request: self.manager.request(.GET, "someURL", parameters: params, encoding: .URL, headers: headers) .validate(statusCode: 200..<300) .validate(contentType: ["application/json"]) .responseJSON { (response) in guard response.result.isSuccess else { print("Error: \(response.result.error)") return } print(response.result.value as? [String: AnyObject]) } 

编辑：

 let manager = {() -> Alamofire.Manager in struct Static { static var dispatchOnceToken: dispatch_once_t = 0 static var instance: Alamofire.Manager! } dispatch_once(&Static.dispatchOnceToken) { let config = NSURLSessionConfiguration.defaultSessionConfiguration() config.requestCachePolicy = .ReloadIgnoringLocalAndRemoteCacheData config.URLCache = nil let cookies = NSHTTPCookieStorage.sharedHTTPCookieStorage() config.HTTPCookieStorage = cookies Static.instance = Alamofire.Manager(configuration: config) } return Static.instance }() manager.request(.GET, "https://stackoverflow.com") .validate(statusCode: 200..<300) .validate(contentType: ["text/html"]) .responseString { (response) in guard response.result.isSuccess else { print("Error: \(response.result.error)") return } print("Result: \(response.result.value)") } 

PS您还可以查看：

NSURLSessionConfiguration.ephemeralSessionConfiguration() - 返回对缓存，cookie或凭据不使用持久存储的会话配置。