Question

所以我尝试使用Parse + Facebook登录我的应用程序，但是在保存用户的实际姓名/电子邮件地址时遇到了困难。我现在只使用Facebook身份验证，现在我的用户可以登录/ reigster，但它将用户名存储为编码字符串（即6zAhVeAklzyKnA5weq29）而不是实际名称。此外，没有电子邮件地址存储（我正在使用Parse默认＆＃34;用户＆＃34;表）。

这是我的代码

主视图控制器：

class homeViewController: UIViewController, PFLogInViewControllerDelegate, PFSignUpViewControllerDelegate {
    @IBOutlet weak var nameLabel: UILabel!

var noteObjects: NSMutableArray! = NSMutableArray()
let permissions = ["public_profile", "email"]

override func viewDidLoad() {
    super.viewDidLoad()        
    Utils.logInWithFacebook()
}

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)

    if (PFUser.currentUser() == nil) {

       // Utils.logInWithFacebook()
        let logInViewController = MyLogInViewController()
        logInViewController.signUpController = PFSignUpViewController()
        //self.presentViewController(logInViewController, animated: true, completion: nil)

        logInViewController.fields = PFLogInFields.Facebook

        logInViewController.delegate = self

        var signUpViewController = PFSignUpViewController()

        signUpViewController.delegate = self

        logInViewController.signUpController = signUpViewController

        self.presentViewController(logInViewController, animated: true, completion: nil)

    }else {
       //  Utils.logInWithFacebook()
        var username = PFUser.currentUser().username
        nameLabel.text = username
        self.fetchAllObjectsFromLocalDatastore()
        self.fetchAllObjects()
    }
}


func fetchAllObjectsFromLocalDatastore() {

    var query: PFQuery = PFQuery(className: "Note")

    query.fromLocalDatastore()
    query.whereKey("username", equalTo: PFUser.currentUser().username)
    query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in

        if (error == nil) {
            var temp: NSArray = objects as NSArray
            self.noteObjects = temp.mutableCopy() as! NSMutableArray
            //                self.tableView.reloadData()
        }else {
            println(error.userInfo)
        }
    }
}

func fetchAllObjects() {

    PFObject.unpinAllObjectsInBackgroundWithBlock(nil)

    var query: PFQuery = PFQuery(className: "Note")
    query.whereKey("username", equalTo: PFUser.currentUser().username)
    query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
        if (error == nil) {
            PFObject.pinAllInBackground(objects, block: nil)
            self.fetchAllObjectsFromLocalDatastore()
        }else {
            println(error.userInfo)
        }
    }
}
func logInViewController(logInController: PFLogInViewController!, shouldBeginLogInWithUsername username: String!, password: String!) -> Bool {

    if (!username.isEmpty || !password.isEmpty) {
        return true
    }else {
        return false
    }
}

func logInViewController(logInController: PFLogInViewController!, didLogInUser user: PFUser!) {
    self.dismissViewControllerAnimated(true, completion: nil)
}

func logInViewController(logInController: PFLogInViewController!, didFailToLogInWithError error: NSError!) {
    println("Failed to log in...")
}

func signUpViewController(signUpController: PFSignUpViewController!, shouldBeginSignUp info: [NSObject : AnyObject]!) -> Bool {
    if let password = info?["password"] as? String {
        // return password.utf16Count >= 8
        return count(password.utf16) >= 8
    } else {
        return false
    }
}

func signUpViewController(signUpController: PFSignUpViewController!, didSignUpUser user: PFUser!) {
    self.dismissViewControllerAnimated(true, completion: nil)
}

func signUpViewController(signUpController: PFSignUpViewController!, didFailToSignUpWithError error: NSError!) {
    println("Failed to sign up...")
}

func signUpViewControllerDidCancelSignUp(signUpController: PFSignUpViewController!) {
    println("User dismissed sign up.")
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

// MARK: - Table view data source

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

    //var upcoming: AddNoteTableViewController = segue.destinationViewController as! AddNoteTableViewController
    if (segue.identifier == "editNote") {

    }
 }
}

我有Facebook登录代码的Utils类

import Foundation

class Utils {

 class func notLoggedIn() -> Bool {
    let user = PFUser.currentUser()
    // here I assume that a user must be linked to Facebook
    return user == nil || !PFFacebookUtils.isLinkedWithUser(user)
}
class func loggedIn() -> Bool {
    return !notLoggedIn()
}


class func logInWithFacebook() {
    PFFacebookUtils.logInWithPermissions(["public_profile", "user_friends", "email"]) {
        (user: PFUser!, error: NSError!) -> Void in
        if user == nil {
            NSLog("The user cancelled the Facebook login (user is nil)")
        } else {
            NSLog("The user successfully logged in with Facebook (user is NOT nil)")
            // HERE I SET AN ACL TO THE INSTALLATION
            if let installation = PFInstallation.currentInstallation() {
                let acl = PFACL(user: PFUser.currentUser()) // Only user can write
                acl.setPublicReadAccess(true) // Everybody can read
                acl.setWriteAccess(true, forRoleWithName: "Admin") // Also Admins can write
                installation.ACL = acl
                //installation.saveEventually()
            }
            // THEN I GET THE USERNAME AND fbId
            Utils.obtainUserNameAndFbId()
        }
    }
}


class func obtainUserNameAndFbId() {
    if notLoggedIn() {
        return
    }
    let user = PFUser.currentUser() // Won't be nil because is logged in
    // RETURN IF WE ALREADY HAVE A USERNAME AND FBID (note that we check the fbId because Parse automatically fills in the username with random numbers)
    if let fbId = user["fbId"] as? String {
        if !fbId.isEmpty {
            println("we already have a username and fbId -> return")
            return
        }
    }
    // REQUEST TO FACEBOOK
    println("performing request to FB for username and IDF...")
    if let session = PFFacebookUtils.session() {
        if session.isOpen {
            println("session is open")
            FBRequestConnection.startForMeWithCompletionHandler({ (connection: FBRequestConnection!, result: AnyObject!, error: NSError!) -> Void in
                println("done me request")
                if error != nil {
                    println("facebook me request - error is not nil :(")
                } else {
                    println("facebook me request - error is nil :)")
                    println(result)
                    // You have 2 ways to access the result:
                    // 1)
                    println(result["name"])
                    println(result["id"])
                    println(result["email"])
                    // 2)
                    println(result.name)
                    println(result.objectID)
                    println(result.email)
                    // Save to Parse:
                    PFUser.currentUser().username = result.email
                    PFUser.currentUser().email = result.email
                    PFUser.currentUser().setValue(result.objectID, forKey: "fbId")
                    PFUser.currentUser().setValue(result.email, forKey: "email")

                    //PFUser.currentUser().saveEventually()
                    // Always use saveEventually if you want to be sure that the save will succeed
                }
            })
        }
    }
}

}

Answer 1

用户登录以便您使用Facebook API的登录屏幕不会为您提供用户的电子邮件。它会为您提供一个访问令牌，即您所看到的6zAhVeAklzyKnA5weq29。除非您创建自定义Web视图，否则您将无法存储用户的电子邮件。但是，您可以将访问令牌存储在NSUserDefaults或Parse案例中（我建议只使用NSUserDefaults，因为它更容易）并使用它来从Facebook API进行调用。

保存电子邮件地址Facebook + Parse（Swift）

1 个答案: