FBSDK Login Error Code: 308 in Objective-C

Question

I keep getting

\"Error Domain=com.facebook.sdk.login Code=308 \"The operation couldn’t be completed. (com.facebook.sdk.login error 308.)\"\"

Answer 1

One solution, at least for me, is to not run on device via the Xcode debugger. If I run the app on device outside the debugger the Facebook login works fine. If I run the app in the sim via the debugger the Facebook login works fine.

Only if I run the app on device via the Xcode debugger do I get the com.facebook.sdk.login error 308 every time.

Answer 2

I was able to get login working again on iOS9 with SDK 4.6.0 by adding the new plist key/value

<key>FacebookDisplayName</key>
<string>{Your App Name}</string>

Source code.

I also took the steps in some other answers here to implement a shared FBSDKLoginManager() instance.

Answer 3

Updating to the latest (4.11) FB SDK fixed this for me as well. Don't forget to clean your project after updating to see if it works for you!

Answer 4

If you are using FBSDK 4.38 there is a bug with the parsing of challengeExpected in FBSDKLoginManager.m.

I found a hot fix of rinat-enikeev for it:

https://github.com/facebook/facebook-sdk-swift/issues/286

https://github.com/facebook/facebook-objc-sdk/pull/922/commits/bcf7f787e92320a6322fb3f6130fdc3815bbafb7

Just change

NSString *challengeExpected = [self loadExpectedChallenge];

to

NSString *challengeExpected = [[self loadExpectedChallenge] stringByReplacingOccurrencesOfString:@"+" withString:@" "];

Thats solved the issue for me.

Answer 5

The solution below works for iOS9 + running on Xcode 8, for Swift3.0

The steps are

1. Setup Facebook Launch

FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)

2. Setup Open Url

   guard let source = options[UIApplicationOpenURLOptionsSourceApplicationKey] as? String else { return false } let annotation = options[UIApplicationOpenURLOptionsAnnotationKey] as? String return FBSDKApplicationDelegate.sharedInstance().application(application, open: url, sourceApplication: source, annotation: annotation)

3. Fix Keychain permission issue as shown in the image below

Answer 6

You should enable Keychain Sharing on the Capabilities tab.