解析 Facebook logInInBackgroundWithReadPermissions (Swift)

Question

我已经成功设置了 Parse (1.7.1) SDK 和 Facebook(v4) SDK，设置了桥接头文件和 AppDelegate.swift。现在在我的 ViewController 中，我正在尝试创建一个 Facebook 登录名，并且我正在尝试使用 'Parse iOS Documentation - Facebook SignUp & Login' 中给出的代码。

  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.")
        }
    })

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

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

谁能帮我解决这个问题？

编辑：给出的脚本在语法方面对我有用，但是，现在我在请求权限之前就一直得到 "Uh no. The user cancelled the Facebook login."；当 facebook 页面仍在加载时.. 我正在尝试的用户已经被这个特定的应用程序接受。看一看： http://imgur.com/5yDs1s1

Answer 1

我升级到 swift 1.2 时遇到同样的问题。似乎与新编译器的某种更严格的语法检查有关。此更改对我有用：

    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.")
        }
    }

Answer 2

我遇到了同样的问题，但代码在将其更改为后对我有用：

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

Answer 3

我通过在 ViewDidLoad 中添加以下代码找到了解决方法：

   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")

        }


    }

也在 App Delegate 中：

  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)
}

桥接头：

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

我不知道它有多真实，但它解决了我的问题

解析 Facebook logInInBackgroundWithReadPermissions (Swift)

Parse Facebook logInInBackgroundWithReadPermissions (Swift)

ios

parse-platform

facebook-sdk-4.0

parsefacebookutils