swift auto login
Automatic Login in IOS Swift – Stack Overflow
iphone – iOS: How to authenticate a user after login (for autologin)? – Stack Overflow
【总结】
基本逻辑是：
1.用户正常登录后，保存对应的用户信息：
用户名和密码
注意不要以NSUserDefaults的形势保存－》因为是明文保存
而要用钥匙链的方式（此处用的是KeychainWrapper.swift）保存－》是加密保存，更安全
2.还是正常的先进入登录页面
3.尝试去恢复用户信息，如果恢复成功，则自动去登录
4.如果恢复失败，则不做任何动作－》等用户自己点击登录按钮去登录
5.如果是第一次启动app，则不要自动登录
相关代码如下：
/Users/crifan/dev/dev_root/daryun/JianDao/iOS-Client/JianDao/CrifanLib.swift
import UIKit func isFirstRunApp() -> Bool { var isFirstRun = false let keyHasLaunchedBefore = "hasLaunchedBefore" let hasLaunchedBefore = NSUserDefaults.standardUserDefaults().boolForKey(keyHasLaunchedBefore) if hasLaunchedBefore { isFirstRun = false } else { isFirstRun = true NSUserDefaults.standardUserDefaults().setBool(true, forKey: keyHasLaunchedBefore) } return isFirstRun } |
/Users/crifan/dev/dev_root/daryun/JianDao/iOS-Client/JianDao/JianDao/AppDelegate.swift
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { if isFirstRunApp() { gCurUserItem.needAutoLogin = false showLoginView() NSThread.sleepForTimeInterval(2) } else { gCurUserItem.needAutoLogin = false SingletonLoginVC().tryRestoreUserAndPassword() SingletonLoginVC().loginAction() dispatch_semaphore_wait(loginDoneSemaphore, DISPATCH_TIME_FOREVER) if gCurUserItem.hasLogined { gLog.info("login successfully") //switch to Main View Controller resetMainVC() showMainView() } else { gLog.debug("login failed, so show login view") showLoginView() } } } |
/Users/crifan/dev/dev_root/daryun/JianDao/iOS-Client/JianDao/LoginViewController.swift
func tryRestoreUserAndPassword() { gLog.debug("") var restoreOk = false var restoredUser:String? = nil var restoredPassword:String? = nil (restoreOk, restoredUser, restoredPassword) = restoreUserAndPassword() if restoreOk { userTextField.text = restoredUser passwordTextField.text = restoredPassword } } |
/Users/crifan/dev/dev_root/daryun/JianDao/iOS-Client/JianDao/GlobalFunctions.swift
import UIKit func storeUserAndPassword(user:String, password:String){ //method 1: store in plain text //NSUserDefaults.standardUserDefaults().setValue(user, forKey: StrUserKey) //NSUserDefaults.standardUserDefaults().setValue(password, forKey: StrPasswordKey) //method 2: store to encryption info if !user.isEmpty { let saveUserOk: Bool = KeychainWrapper.setString(user, forKey: StrUserKey) gLog.info("save user \(user) \(saveUserOk)") } if !password.isEmpty{ let savePasswordOk: Bool = KeychainWrapper.setString(password, forKey: StrPasswordKey) gLog.info("save password \(savePasswordOk)") } } func restoreUserAndPassword() -> (Bool, String?, String?) { var restoreOk = false var prevStoredUser:String? var prevStotedPassword:String? // //method 1: get previous stored in plain text // let prevStoredUser = NSUserDefaults.standardUserDefaults().stringForKey(StrUserKey) // let prevStoredPassword = NSUserDefaults.standardUserDefaults().stringForKey(StrPasswordKey) //method 2: get previous stored in encryption prevStoredUser = KeychainWrapper.stringForKey(StrUserKey) prevStotedPassword = KeychainWrapper.stringForKey(StrPasswordKey) if (prevStoredUser != nil) && !(prevStoredUser!.isEmpty) && (prevStotedPassword != nil) && !(prevStotedPassword!.isEmpty) { restoreOk = true } gLog.info("restore user and password: \(restoreOk), restored user: \(prevStoredUser)") return (restoreOk, prevStoredUser, prevStotedPassword) } func deletePrevStoredUserAndPassword(){ let removeUserOk: Bool = KeychainWrapper.removeObjectForKey(StrUserKey) let removePasswordOk: Bool = KeychainWrapper.removeObjectForKey(StrPasswordKey) gLog.info("remove previous stored user: \(removeUserOk), remove previous stored password=\(removePasswordOk)") } |
转载请注明：在路上 » ［已解决］swift中实现app自动登录