我正在尝试将用户保存到我的firebase数据库.我正在使用FBSDKLoginManager()来创建帐户/登录.创建帐户后,我想将用户存储到我的firebase数据库中.我现在可以登录用户并且他们的电子邮件显示在firebase的Auth选项卡中(参见屏幕截图),但我的updateChildValues似乎没有任何影响(也见截图).
我将updateChildValues放在正确的位置吗？它目前位于signInWithCredential中.我还必须执行FBSDKGraphRequest来获取我感兴趣的信息存储在我的firebase数据库中.
我的firebase的Auth选项卡显示身份验证正在运行：
但数据库没有更新：
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：
显然在10分钟左右之后,数据库被更新了空的Facebook数据…不知道为什么它需要这么长时间.这是一个截图：
解决方法
您应该只在执行完成块graphRequest.startWithCompletionHandler时更新值,因为那时您将从Facebook获取数据！
usersReference.updateChildValues需要在graphRequest.startWithCompletionHandler里面({(连接,结果,错误) – >在完成块中无效.我已经在下面附上了它.试试!!
usersReference.updateChildValues需要在graphRequest.startWithCompletionHandler里面({(连接,结果,错误) – >在完成块中无效.我已经在下面附上了它.试试!!
func showLoginView() {
let loginManager = FBSDKLoginManager()
loginManager.logInWithReadPermissions(fbPermissions,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,"facebookID": self.usersFacebookID]
// update our databse by using the child database reference above called usersReference
usersReference.updateChildValues(values,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")
})
}
})
}
}
})
}
