我有一个按下注册按钮时运行的功能，如果用户没有帐户，或者没有错误，则使用Auth.auth().createUser(withEmail: email, password: password)注册用户。然后我将它们添加到数据库中并对其进行签名。如果有任何错误，我会显示错误并return。
但是，即使用户之前从未注册过并且数据库没有其信息，我也会收到.emailAlreadyInUse错误，之后无论如何都会将用户添加到数据库中。 Firebase似乎正在创建帐户，然后给我一个错误。为什么这样，我该如何解决？
这是我的代码：
@IBAction func registerPressed(_ sender: Any?) {
//set up new user using Firebase
if (firstNameTextField.text! == "" && emailTextField.text! == "" && passwordTextField.text! == "") {
self.topMessage.text = "Please enter your details"
} else if (firstNameTextField.text! == "" && emailTextField.text! != "" && passwordTextField.text! != "") {
self.topMessage.text = "Please enter your first name"
} else {
Auth.auth().createUser(withEmail: emailTextField.text!, password: passwordTextField.text!) {
(user, error) in
if error != nil {
print(error!)
if let errCode = AuthErrorCode(rawValue: error!._code) {
switch errCode {
case .weakPassword:
self.topMessage.text = "Password too short"
break
case .emailAlreadyInUse:
self.topMessage.text = "Email already in use"
break
case .invalidEmail:
self.topMessage.text = "Invalid email"
break
case .missingEmail:
self.topMessage.text = "Please enter an email"
break
default:
self.topMessage.text = "Error :( Please try again!"
break
}
}
return
}
else if let user = user {
let username = self.firstNameTextField.text!
let name = self.firstNameTextField.text!
let email = self.emailTextField.text!
let profileImage = ""
let password = self.passwordTextField.text!
let newUser = User(uid: user.uid, username: username, name: name, profileImage: profileImage, email: email, userCoins: 0, questsComplete: 0, rewardsRedeemed: 0, streak: 0, isSubscribed: false)
newUser.save(completion: { (error) in
if error != nil {
print(error!)
} else {
//successfully initialised
Auth.auth().signIn(withEmail: email, password: password, completion: { (user, error) in
if let error = error {
print(error)
} else {
self.performSegue(withIdentifier: "registerToMainMap", sender: self)
}
})
}
})
}
}
}
}
答案 0 :(得分：0)
根据文件Firebase documentation on errors
FIRAuthErrorCodeEmailAlreadyInUse 表示用于尝试注册的电子邮件已存在。调用 fetchProvidersForEmail 来检查用户使用的登录机制，并提示用户使用其中一个登录。
那么，这样的事情会给你带来什么？
Auth.auth().fetchProviders(forEmail: emailTextField.text!) { (email,completion) in
print("email is ", email!)
print("completion is ", completion!)
}
答案 1 :(得分：0)
弄清楚我的问题。 .save()函数中嵌入了.saveProfileImage()，它在用户注册时运行。当我以不同的方式实现图像时，我评论了该功能。但是，由于.saveProfileImage()是一个completion(error)，它也被注释掉了，因此func save(completion: @escaping (Error?) -> Void) {}无效。我只是把它变成func save()来修复它。
这是旧的save()功能：
func save(completion: @escaping (Error?) -> Void) {
let ref = AppDatabaseReference.users(uid: uid).reference()
ref.setValue(toDictionary())
//save the user's profile image
if let profileImage = self.profileImage {
let firImage = FirebaseImage(image: profileImage)
firImage.saveProfileImage(uid, { (error) in
//called when profile image is successfully uploaded
completion(error)
})
}
}
.saveProfileImage()：
func saveProfileImage(_ userUID: String, _ completion: @escaping (Error?) -> Void) {
let resizedImage = image.resize()
if let imageData = UIImageJPEGRepresentation(resizedImage, 0.9) {
//get the reference
ref = AppStorageReference.profileImages.reference().child(userUID)
downloadURLString = ref.description
//save data to reference
ref.putData(imageData, metadata: nil, completion: { (metaData, error) in
completion(error)
})
}
}
以及注册后保存用户的内容：
else if let user = user {
let username = self.firstNameTextField.text!
let name = self.firstNameTextField.text!
let email = self.emailTextField.text!
let profileImage = ""
let password = self.passwordTextField.text!
let newUser = User(uid: user.uid, username: username, name: name, profileImage: profileImage, email: email, userCoins: 0, questsComplete: 0, rewardsRedeemed: 0, streak: 0, isSubscribed: false)
newUser.save(completion: { (error) in
if error != nil {
print(error!)
} else {
//successfully initialised
Auth.auth().signIn(withEmail: email, password: password, completion: { (user, error) in
if error != nil {
print(error!)
} else {
print("segue to perform")
self.performSegue(withIdentifier: "registerToMainMap", sender: self)
}
})
}
})
}
新 save()：
func save() {
let ref = AppDatabaseReference.users(uid: uid).reference()
ref.setValue(toDictionary())
}
保存用户：
else if let user = user {
let username = self.firstNameTextField.text!
let name = self.firstNameTextField.text!
let email = self.emailTextField.text!
let profileImage = ""
let password = self.passwordTextField.text!
let newUser = User(uid: user.uid, username: username, name: name, profileImage: profileImage, email: email, userCoins: 0, questsComplete: 0, rewardsRedeemed: 0, streak: 0, isSubscribed: false)
newUser.save()
//successfully initialised
Auth.auth().signIn(withEmail: email, password: password, completion: { (user, error) in
if error != nil {
print(error!)
} else {
print("segue to perform")
self.performSegue(withIdentifier: "registerToMainMap", sender: self)
}
})
}