问题：
Swift/Firebase：如何在Facebook用户创建帐户时将其正确存储到Firebase数据库中？
公良琛
我正在尝试将用户保存到我的Firebase数据库。我正在使用FBSDKLoginManager（）创建帐户/登录。创建帐户后，我想将用户存储到我的Firebase数据库中。我目前可以登录用户，他们的电子邮件显示在Firebase的Auth选项卡中（见屏幕截图），但我的updateChildValures似乎没有任何影响（另见屏幕截图）。
我是否将updatechildvalue放在了正确的位置？它当前位于带有凭据的登录中。我还必须执行FBSDKGraphRequest以获取我感兴趣的信息，并将其存储在我的firebase数据库中。
func showLoginView() {
let loginManager = FBSDKLoginManager()
loginManager.logInWithReadPermissions(fbPermissions, fromViewController: self, handler: { (result:FBSDKLoginManagerLoginResult!, error:NSError!) -> Void in
if ((error) != nil) {
print("Error loggin in is \(error)")
} else if (result.isCancelled) {
print("The user cancelled loggin in")
} else {
// No error, No cancelling:
// using the FBAccessToken, we get a Firebase token
let credential = FIRFacebookAuthProvider.credentialWithAccessToken(FBSDKAccessToken.currentAccessToken().tokenString)
// using the credentials above, sign in to firebase to create a user session
FIRAuth.auth()?.signInWithCredential(credential) { (user, error) in
print("User logged in the firebase")
// adding a reference to our firebase database
let ref = FIRDatabase.database().referenceFromURL("https://project-12345.firebaseio.com/")
// guard for user id
guard let uid = user?.uid else {
return
}
// create a child reference - uid will let us wrap each users data in a unique user id for later reference
let usersReference = ref.child("users").child(uid)
// performing the Facebook graph request to get the user data that just logged in so we can assign this stuff to our Firebase database:
let graphRequest : FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, email"])
graphRequest.startWithCompletionHandler({ (connection, result, error) -> Void in
if ((error) != nil) {
// Process error
print("Error: \(error)")
} else {
print("fetched user: \(result)")
// Facebook users name:
let userName:NSString = result.valueForKey("name") as! NSString
self.usersName = userName
print("User Name is: \(userName)")
print("self.usersName is \(self.usersName)")
// Facebook users email:
let userEmail:NSString = result.valueForKey("email") as! NSString
self.usersEmail = userEmail
print("User Email is: \(userEmail)")
print("self.usersEmail is \(self.usersEmail)")
// Facebook users ID:
let userID:NSString = result.valueForKey("id") as! NSString
self.usersFacebookID = userID
print("Users Facebook ID is: \(userID)")
print("self.usersFacebookID is \(self.usersFacebookID)")
}
})
// set values for assignment in our Firebase database
let values = ["name": self.usersName, "email": self.usersEmail, "facebookID": self.usersFacebookID]
// update our databse by using the child database reference above called usersReference
usersReference.updateChildValues(values, withCompletionBlock: { (err, ref) in
// if there's an error in saving to our firebase database
if err != nil {
print(err)
return
}
// no error, so it means we've saved the user into our firebase database successfully
print("Save the user successfully into Firebase database")
})
}
}
})
}
更新：
显然，大约10分钟后，数据库被更新为空的Facebook数据。。。不知道为什么要花这么长时间。以下是屏幕截图：
共有2个答案
子车煌
您应该只在执行完成块时更新值graph Request.startNevCompletionHandler，因为那是您从Facebook获取数据的时候！。usersReference.updateChildValures需要在graph R内部equest.startSusCompletionHandler（{（连接、结果、错误）-
func showLoginView() {
let loginManager = FBSDKLoginManager()
loginManager.logInWithReadPermissions(fbPermissions, fromViewController: self, handler: { (result:FBSDKLoginManagerLoginResult!, error:NSError!) -> Void in
if ((error) != nil) {
print("Error loggin in is \(error)")
} else if (result.isCancelled) {
print("The user cancelled loggin in")
} else {
// No error, No cancelling:
// using the FBAccessToken, we get a Firebase token
let credential = FIRFacebookAuthProvider.credentialWithAccessToken(FBSDKAccessToken.currentAccessToken().tokenString)
// using the credentials above, sign in to firebase to create a user session
FIRAuth.auth()?.signInWithCredential(credential) { (user, error) in
print("User logged in the firebase")
// adding a reference to our firebase database
let ref = FIRDatabase.database().referenceFromURL("https://project-12345.firebaseio.com/")
// guard for user id
guard let uid = user?.uid else {
return
}
// create a child reference - uid will let us wrap each users data in a unique user id for later reference
let usersReference = ref.child("users").child(uid)
// performing the Facebook graph request to get the user data that just logged in so we can assign this stuff to our Firebase database:
let graphRequest : FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, email"])
graphRequest.startWithCompletionHandler({ (connection, result, error) -> Void in
if ((error) != nil) {
// Process error
print("Error: \(error)")
} else {
print("fetched user: \(result)")
// Facebook users name:
let userName:NSString = result.valueForKey("name") as! NSString
self.usersName = userName
print("User Name is: \(userName)")
print("self.usersName is \(self.usersName)")
// Facebook users email:
let userEmail:NSString = result.valueForKey("email") as! NSString
self.usersEmail = userEmail
print("User Email is: \(userEmail)")
print("self.usersEmail is \(self.usersEmail)")
// Facebook users ID:
let userID:NSString = result.valueForKey("id") as! NSString
self.usersFacebookID = userID
print("Users Facebook ID is: \(userID)")
print("self.usersFacebookID is \(self.usersFacebookID)")
//graphRequest.startWithCompletionHandler may not come back during serial
//execution so you cannot assume that you will have date by the time it gets
//to the let values = ["name":
//By putting it inside here it makes sure to update the date once it is
//returned from the completionHandler
// set values for assignment in our Firebase database
let values = ["name": self.usersName, "email": self.usersEmail, "facebookID": self.usersFacebookID]
// update our databse by using the child database reference above called usersReference
usersReference.updateChildValues(values, withCompletionBlock: { (err, ref) in
// if there's an error in saving to our firebase database
if err != nil {
print(err)
return
}
// no error, so it means we've saved the user into our firebase database successfully
print("Save the user successfully into Firebase database")
})
}
})
}
}
})
}
邵飞白
Swift 3：（只在末尾更改，节省了很多行）
func showLoginView() {
let loginManager = FBSDKLoginManager()
loginManager.logInWithReadPermissions(fbPermissions, fromViewController: self, handler: { (result:FBSDKLoginManagerLoginResult!, error:NSError!) -> Void in
if ((error) != nil) {
print("Error loggin in is \(error)")
} else if (result.isCancelled) {
print("The user cancelled loggin in")
} else {
// No error, No cancelling:
// using the FBAccessToken, we get a Firebase token
let credential = FIRFacebookAuthProvider.credentialWithAccessToken(FBSDKAccessToken.currentAccessToken().tokenString)
// using the credentials above, sign in to firebase to create a user session
FIRAuth.auth()?.signInWithCredential(credential) { (user, error) in
print("User logged in the firebase")
// adding a reference to our firebase database
let ref = FIRDatabase.database().referenceFromURL("https://project-12345.firebaseio.com/")
// guard for user id
guard let uid = user?.uid else {
return
}
// create a child reference - uid will let us wrap each users data in a unique user id for later reference
let usersReference = ref.child("users").child(uid)
// performing the Facebook graph request to get the user data that just logged in so we can assign this stuff to our Firebase database:
let graphRequest : FBSDKGraphRequest(graphPath: "/me", parameters: ["fields": "id, email, name"]).start{
(connection, result, err) in
if ((error) != nil) {
// Process error
print("Error: \(error)")
} else {
print("fetched user: \(result)")
let values: [String:AnyObject] = result as! [String : AnyObject]
// update our databse by using the child database reference above called usersReference
usersReference.updateChildValues(values, withCompletionBlock: { (err, ref) in
// if there's an error in saving to our firebase database
if err != nil {
print(err)
return
}
// no error, so it means we've saved the user into our firebase database successfully
print("Save the user successfully into Firebase database")
})
}
})
}
}
})
}
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