解析Facebook logInInBackgroundWithReadPermissions（Swift） [英] Parse Facebook logInInBackgroundWithReadPermissions (Swift)

问题描述

我已成功设置Parse（1.7.1）SDK和Facebook（v4）SDK，设置桥接头文件和AppDelegate.swift。现在在我的ViewController中，我正在尝试创建一个Facebook登录，我正在尝试使用中给出的代码'解析iOS文档 - Facebook SignUp&登录。

I have set both Parse (1.7.1) SDKs and Facebook(v4) SDKs successfully, set bridging header files and AppDelegate.swift. Now in my ViewController, I am trying to create a Facebook Login and I am trying to use the code given in 'Parse iOS Documentation - Facebook SignUp & Login'.

  PFFacebookUtils.logInInBackgroundWithReadPermissions(permissions, {
     (user: PFUser!, error: NSError!) -> Void in
       if let user = user {
        if user.isNew {
           println("User signed up and logged in through Facebook!")
        } else {
           println("User logged in through Facebook!")
        }
       } else {
         println("Uh oh. The user cancelled the Facebook login.")
        }
    }) 

但是当我将它粘贴到我的ViewController.swift> ViewDidLoad中时，我收到此错误：

However when I paste it in my ViewController.swift > ViewDidLoad, I am receiving this error:

- Extra argument in call      // for { at the first line

任何人都可以帮我解决这个问题吗？

Can anyone please help me sort this out?

编辑：给出的脚本对我有用但是，语法方面，现在我不断得到呃不。用户取消了Facebook登录。甚至在它要求权限之前;虽然Facebook页面仍在加载..我正在尝试的用户已经被这个特定的应用程序接受。
看看：
http://imgur.com/5yDs1s1

The script given has worked for me in terms of syntax, however, now I keep getting "Uh no. The user cancelled the Facebook login." even before it asks for permissions; while the facebook page is still loading.. And the user I am trying is already accepted for this particular app. Take a look: http://imgur.com/5yDs1s1

推荐答案

我通过在ViewDidLoad中添加此代码找到了解决办法：

I found a work-around by adding this code in ViewDidLoad:

   if PFUser.currentUser() != nil {

        self.performSegueWithIdentifier("loginSegue", sender: self)

    }

一起放在按钮中：

   @IBAction func Facebook(sender: AnyObject) {

    var permissions = ["public_profile"]

    PFFacebookUtils.logInInBackgroundWithReadPermissions(permissions) { (user: PFUser?, error: NSError?) -> Void in
        if let user = user {
            if user.isNew {
                println("User signed up and logged in through Facebook!")

                self.facebookButton.alpha = 0



                self.performSegueWithIdentifier("signUp", sender: self)

            } else {

               println("User logged in through Facebook!")

                self.facebookButton.alpha = 0

                 let currentUser = PFUser.currentUser()

                self.performSegueWithIdentifier("loginSegue", sender: self)

            }

        } else {

            println("Uh oh. The user cancelled the Facebook login.")

            println("User cancelled")

        }


    }

同样在App Delegate中：

Also in App Delegate:

  func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.
    Parse.setApplicationId("###",
        clientKey: "###")

    PFFacebookUtils.initializeFacebookWithApplicationLaunchOptions(launchOptions)

    PFUser.enableRevocableSessionInBackground()


    return true
}

和

      func application(application: UIApplication,
    openURL url: NSURL,
    sourceApplication: String?,
    annotation: AnyObject?) -> Bool {
        return FBSDKApplicationDelegate.sharedInstance().application(application,
            openURL: url,
            sourceApplication: sourceApplication,
            annotation: annotation)
}

桥接标题：

  #import <FBSDKCoreKit/FBSDKCoreKit.h>
  #import <ParseFacebookUtilsV4/PFFacebookUtils.h>
  #import <Parse/Parse.h>
  #import <Bolts/Bolts.h>
  #import <FBSDKLoginKit/FBSDKLoginKit.h>

我不知道它有多远，但它解决了我的问题

I don't know how far it is true but it solved my problem

这篇关于解析Facebook logInInBackgroundWithReadPermissions（Swift）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！