Problem:
Using the FB SDK and the method openActiveSessionWithReadPermissions, the completion handler doesn't appear to get called when the app is reopened from Facebook web or Facebook app and I get this error output:
FBSDKLog: FBSession INVALID transition from FBSessionStateCreated to FBSessionStateClosed FBSDKLog: FBSession transition from FBSessionStateCreated to FBSessionStateCreatedOpening
Context
- Using Facebook SDK 3.2.1
- App is built for iOS 5.0+
- Using xCode 4.6.1
- Testing on Simulator iOS 5.1
- Testing on iPhone 4S, running iOS 6.1.2 (not using 6.0 social framework as want to test implementation for 5.0+)
- Updating an app that was originally built for iOS 3.0 and using an old version of sharekit, but has now been updated for ARC and the share kit implementation I believe has all been commented out - hoping the issue is not a conflict with a old share kit function, can't fin any within the code
Steps taken to resolve
Searched throughout Stack Overflow, found similar issues mentioned but not a solution
- ios6 facebook integration login always FBSessionStateClosedLoginFailed never opens (i already have bool:application implemented)
- Facebook iOS SDK 3.0 - session not open
- Facebook SDK 3.1 - Error validating access token
- Have the correct app bundle in the FB settings panel
- Have the correct Facebook app ID is the plist
- Have FB logging turned on FBSettings setLoggingBehavior
Specifics:
These are the steps I took to implement Facebook connectivity within the app.
- The first step I took was walking through the Facebook tutorial at: https://developers.facebook.com/docs/tutorials/ios-sdk-tutorial/. I got the first part, the authentication part working as expected (I built a separate app as instructed by the tutorial.)
- I then took the same steps within the tutorial in the app I'm updating, this did not work
- I then followed the instructions on https://developers.facebook.com/docs/howtos/login-with-facebook-using-ios-sdk/ (which are very similar to the tutorial)
- Again I ran into issues
- Then spent a lot of time searching for solution, could not find one
Highlevel steps in code:
- I have my FB methods set up in AppDelegate
- In a specific view controller I have a button that calls the openSessionWithAllowLoginUI method to start the login process
Code
AppDelegate.m
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
// set up facebook logging
[FBSettings setLoggingBehavior:[NSSet setWithObjects:FBLoggingBehaviorFBRequests, FBLoggingBehaviorFBURLConnections, FBLoggingBehaviorAccessTokens, FBLoggingBehaviorSessionStateTransitions, nil]];
// Call the ACAccountStore method renewCredentialsForAccount, which will update the OS's understanding of the token state
ACAccountStore *accountStore;
ACAccountType *accountTypeFB;
if ((accountStore = [[ACAccountStore alloc] init]) &&
(accountTypeFB = [accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierFacebook] ) ){
NSArray *fbAccounts = [accountStore accountsWithAccountType:accountTypeFB];
id account;
if (fbAccounts && [fbAccounts count] > 0 &&
(account = [fbAccounts objectAtIndex:0])){
[accountStore renewCredentialsForAccount:account completion:^(ACAccountCredentialRenewResult renewResult, NSError *error) {
//we don't actually need to inspect renewResult or error.
if (error){
}
}];
}
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
// We need to properly handle activation of the application with regards to Facebook Login
// (e.g., returning from iOS 6.0 Login Dialog or from fast app switching).
NSLog(@"Calling app did become active");
[FBSession.activeSession handleDidBecomeActive];
}
/*
* Callback for session changes.
*/
- (void)sessionStateChanged:(FBSession *)session
state:(FBSessionState) state
error:(NSError *)error
{
NSLog(@"Session State Changed");
switch (state) {
case FBSessionStateOpen:
if (!error) {
// We have a valid session
NSLog(@"User session found");
}
break;
case FBSessionStateClosed:
case FBSessionStateClosedLoginFailed:
[FBSession.activeSession closeAndClearTokenInformation];
break;
default:
break;
}
[[NSNotificationCenter defaultCenter]
postNotificationName:FBSessionStateChangedNotification
object:session];
if (error) {
UIAlertView *alertView = [[UIAlertView alloc]
initWithTitle:@"Error"
message:error.localizedDescription
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alertView show];
}
}
/*
* Opens a Facebook session and optionally shows the login UX.
*/
- (BOOL)openSessionWithAllowLoginUI:(BOOL)allowLoginUI {
NSLog(@"Openning session with Facebook");
return [FBSession openActiveSessionWithReadPermissions:nil
allowLoginUI:allowLoginUI
completionHandler:^(FBSession *session,
FBSessionState state,
NSError *error) {
[self sessionStateChanged:session
state:state
error:error];
}];
}
/*
* If we have a valid session at the time of openURL call, we handle
* Facebook transitions by passing the url argument to handleOpenURL
*/
- (BOOL)application:(UIApplication *)application
openURL:(NSURL *)url
sourceApplication:(NSString *)sourceApplication
annotation:(id)annotation {
// attempt to extract a token from the url
NSLog(@"Calling open URL");
return [FBSession.activeSession handleOpenURL:url];
}
- (void) closeSession {
NSLog(@"Clossing Facebook Sessions");
[FBSession.activeSession closeAndClearTokenInformation];
}
- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url
{
NSLog(@"handleOpenUrl Called");
return [FBSession.activeSession handleOpenURL:url];
}
View Controller with button
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
// Register for Facebook change notification
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(sessionStateChanged:)
name:FBSessionStateChangedNotification
object:nil];
}
- (IBAction)login:(id)sender {
ATIAppDelegate *myAppDelegate = (ATIAppDelegate *)[[UIApplication sharedApplication]delegate];
[myAppDelegate openSessionWithAllowLoginUI:YES];
}
What I think the issue could be?
- It seems like it may be something with the tokens?
- Or maybe the notification center?
- Note that during testing I've been going and revoking access of the Facebook app to my account and then trying to login again to the app, I see these has caused issues with other users
