if self.rememberPwd && !self.encryptedPwd {
// 将账号和密码保存到keychain中
KeychainSwift().set(self.realUserName, forKey: "thorgeneRememberedUserName")
let encPwd = try SwiftyRSA.encryptString(self.passwordTextField.text!, publicKeyPEM: response!["public_key"] as! String, padding: .OAEP)
KeychainSwift().set(encPwd, forKey: "thorgeneRememberedPassword")
NSUserDefaults.standardUserDefaults().setBool(true, forKey: "rememberPwdEnabled")
} catch {
KeychainSwift().delete("thorgeneRememberedUserName")
NSUserDefaults.standardUserDefaults().setBool(false, forKey: "rememberPwdEnabled")
