ios – 为什么我在访问用户的Facebook信息时会收到此错误？

为什么它给我错误2015-09-14 20：56：31.773 Musec [7207：3288153] FBSDKLog：从Graph API v2.4开始,对/ me的GET请求应包含我正在尝试的显式“fields”参数访问用户信息,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,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.")
        }
    })
}