How to use Facebook iOS SDK on iOS 10

I am trying to use Xcode 8 to build a app with Facebook login using Swift 3. When I switch back iOS Simulator 9.3, it works. In iOS 10, I receive this error:

""fbauth2:/" The operation couldn’t be completed. (OSStatus error -10814.)"

and

Optional(Error Domain=com.facebook.sdk.login Code=308 "(null)")

Anyone have solution for this?

Note 1 :

After debugging, this problem is FBSDK cant update expect_challange. Function SecItemUpdate inside security.framework not work. This is a problem of IOS 10

Error OSStatus -10814 occures when canOpenURL: can't find any application, that can open this URL (actually, Facebook trying to find their application by calling canOpenURL: with argument "fbauth2:/"). Printing happens inside of function, so you can't do anything with that. But if you will run your application on device with installed Facebook app, you will not see this error.

Error 308 occures because of the situation, when value, stored in keychain is not equal to value, that is stored in facebook completion parameters (for more information you can check -[FBSDKLoginManager completeAuthentication:expectChallenge:]).

It happens because Apple changed the way of working with keychain in iOS 10. To fix this issue you simply should go to Targets->Capabilities and enable keychain sharing (it enables access to keychain for your app):

If you are using Xamarin (read this link for more information, thanks @dynamokaj):

> Just make sure you enable the keychain access in Entitlements and > select the entitlements for Simulator (Debug) builds too. By default > this is not set.

Same problem was in my app, i checked many solution but did't works for me. I've fix this problem using below method.

Go to this Link Select Your App and configure your info.plist

import and add this code in your AppDelegate

import FBSDKCoreKit
import FBSDKLoginKit

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    return FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)
}
    
func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
    return FBSDKApplicationDelegate.sharedInstance().application(app, open: url, options: options)
}

The main reason why you're getting the following error,

canOpenURL: failed for URL: "fbauth2:/" - error: "The operation couldn’t be completed. (OSStatus error -10814.)

is that your iOS simulator does not have the Facebook Application installed. Until you install the application on your iOS simulator, you will continue to get the error. Try running your iOS application on a provisioned iOS device with Facebook installed and you will not see the error message again. Hope this helps!

In my case, the fix was*:

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool { 

  // First, handle Facebook URL open request
  if let fbSDKAppId = FBSDKSettings.appID(), url.scheme!.hasPrefix("fb\(fbSDKAppId)"), url.host == "authorize" { 
    let shouldOpen: Bool = FBSDKApplicationDelegate.sharedInstance().application(app, open: url, sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String!, annotation: options[UIApplicationOpenURLOptionsKey.annotation]) 
    return shouldOpen 
  } 

  // After it, handle any other response (e.g. deep links)
  handlerOtherUrls(url: url) 
  return true 
}

*As recommended by @MoridinBG at Facebook SDK's Github page

This error can also be caused if you are using FBSDKCoreKit or FBSDKLoginKit version 4.39.0 . There was a bug in this version of the SDK. Upgrade to 4.39.1 or higher to fix it. Details here.

As a side note, other users mentioned that this error is seen if you don't have Facebook installed on the simulator. That is true, but the SDK is supposed to automatically fall back to the Web login method when the app is not installed. If that doesn't happen it may be caused by another issue such as missing/misconfigured values in your Info.plist (check LSApplicationQueriesSchemes) or missing methods on your AppDelegate.

In my case, the problem was Google Analytics. By default it seems it's adding its own view controller on top of the app's view controller. Setting "FirebaseAppDelegateProxyEnabled" to "NO" in {Your app}-Info.plist solved the problem.