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我遇到了通过Firebase登录的问题。当它是Swift 2时，一切都很顺利，但是在XCode将我的整个项目转换为Swift 3语法后，出现了错误。FIRAuth：访问钥匙串时发生错误（Swift 3）
这里是我的代码登录：
func loginDidFinish(_ email: String, password: String, type: LoginViewController.SendType) {
// Server call implementation here
if type == .login {
FIRAuth.auth()?.signIn(withEmail: email, password: password, completion: { (user, error) in
if error != nil {
self.alert = UIAlertController(title: "Error", message: error?.localizedDescription, preferredStyle: .alert)
self.present(self.alert, animated: true, completion: nil)
let delay = Double(2) * Double(NSEC_PER_SEC)
let time = DispatchTime.now() + Double(Int64(delay))/Double(NSEC_PER_SEC)
DispatchQueue.main.asyncAfter(deadline: time) { [weak self] in
self!.alert.dismiss(animated: true, completion: nil)
}
} else {
_ = self.navigationController?.popViewController(animated: true)
}
})
} else { // type == .SignUp
FIRAuth.auth()?.createUser(withEmail: email, password: password, completion: { (user, error) in
if error != nil {
self.alert = UIAlertController(title: "Error", message: error?.localizedDescription, preferredStyle: .alert)
self.present(self.alert, animated: true, completion: nil)
let delay = Double(2) * Double(NSEC_PER_SEC)
let time = DispatchTime.now() + Double(Int64(delay))/Double(NSEC_PER_SEC)
DispatchQueue.main.asyncAfter(deadline: time) { [weak self] in
self!.alert.dismiss(animated: true, completion: nil)
}
} else {
_ = self.navigationController?.popViewController(animated: true)
}
})
}
附：当我尝试注册时，一切正常。用户已创建，但popUpViewController在此处不起作用。
P.P.S.我已经看过类似的问题"An error occurred while accessing the keychain" when signing in using Firebase，但是从中没有任何理解。也读这https://firebase.google.com/docs/auth/ios/errors。