为什么我在访问用户的Facebook信息时会收到此错误？

Question

为什么它给我错误2015-09-14 20:56:31.773 Musec[7207:3288153] FBSDKLog: starting with Graph API v2.4, GET requests for /me should contain an explicit "fields" parameter我试图访问用户信息,如朋友,电子邮件等.如何修复错误？以下是登录以及访问用户信息的权限.

@IBAction func loginWithFB(sender: AnyObject) {

    var permissions = [ "public_profile", "email", "user_friends"]

    PFFacebookUtils.logInInBackgroundWithReadPermissions(permissions,  block: {  (user: PFUser?, error: NSError?) -> Void in
        if let user = user {

            if user.isNew {
                println("User signed up and logged in through Facebook!")
                self.performSegueWithIdentifier("success", sender: self)
                //let params = ["fields": "name, email, friends"]
                let graphRequest: FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "name, email, friends"])
                graphRequest.startWithCompletionHandler({ (connection, result, error) -> Void in

                if ((error) != nil)
                {
                    // Process error
                    println("Error: \(error)")
                }
                else
                {
                    //get username
                    let userName : NSString = result.valueForKey("name") as! NSString
                    println(userName)
                    //get Facebook ID
                    let email: NSString = result.valueForKey("email") as! NSString
                    println(email)
                    //get facebook friends who use app
                    let friendlist: NSString = result.valueForKey("friends") as! NSString
                    println(friendlist)

                }
                })

            } else {
                println("User logged in through Facebook!")
                self.performSegueWithIdentifier("success", sender: self)
            }
        } else {
            println("Uh oh. The user cancelled the Facebook login.")
        }
    })
}

Answer 1

我不认为这FBSDKLog: starting with Graph API v2.4, GET requests for /me should contain an explicit "fields" parameter实际上是一个错误.它只是一个日志.如果你将运行代码并设置一个断点,你会发现,实际上是错误nil,你将能够成功编译代码并看到代码else部分被执行.

现在,您试图访问nameFacebook的用户,但没有通过name的fields.这就是为什么你会得到name的null.name作为参数列表传递.

let params = ["fields": "name, email, friends"] <----- This line

或者在这里:

let graphRequest: FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "name, email, friends"])

现在,您将能够获取name, email and friendsFacebook用户.