Parse.com Facebook authorize never calls completion handler

Parse.com Facebook authorize never calls completion handler

By : user2955528
Date : November 22 2020, 10:40 AM
it should still fix some issue First of all, why are you calling [[PFFacebookUtils session] close] in your applicationWillTerminate: callback ? The Facebook session uses a token stored on disk, which means the session is kept open across app launches and has no reason to be closed when the app is terminated.
If you want to log the user out, you should call [PFUser logOut] and then [[PFFacebookUtils session] close] or better [[PFFacebookUtils session] closeAndClearTokenInformation] (but I'm not sure this is even necessary). If you don't want to log the user out (which I think is better), just don't call anything.
code :
[[PFFacebookUtils session] requestNewPublishPermissions:[NSArray arrayWithObject:@"publish_actions"] defaultAudience:FBSessionDefaultAudienceFriends completionHandler:^(FBSession *session, NSError *error) {
    if (!error) {
        if ([[PFFacebookUtils session].permissions indexOfObject:@"publish_actions"] == NSNotFound) {
            // Permission not granted, tell the user we will not share to Facebook
            NSLog(@"Permission not granted, we will not share to Facebook.");
        } else {
            // Permission granted.
    } else {
        // An error occurred. See: https://developers.facebook.com/docs/ios/errors
        NSLog(@"Error : Requesting \"publish_actions\" permission failed with error : %@", error);

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Facebook iOS SDK Not Calling Completion Handler

Facebook iOS SDK Not Calling Completion Handler

By : Cedric Leong
Date : March 29 2020, 07:55 AM
around this issue Okay I figured it out - the issue was nothing to do with FB itself, the app (I'm working on updating someone else's code) had a setting in the .plist - 'Application does not run in background' set to true.
Meaning that once the app was relaunched from the Facebook app or Facebook mobile site it wasn't prepared to handle the next step.
How do I do consecutive function calls using the completion handler in Swift on an SKSpriteNode?

How do I do consecutive function calls using the completion handler in Swift on an SKSpriteNode?

By : Ashwin Gurbuxani
Date : March 29 2020, 07:55 AM
it helps some times In the completion handler in runAction you should be calling the completion handler in your method
code :
mgImage.runAction(movingAndReplacingLevelImage){ () -> Void in
        if --callCount == 0 {
func midGroundlevelMovingSlow(completion: (()->Void)?) {

    let moveLevelImage = SKAction.moveByX(-self.frame.size.width, y: 0, duration: gameSpeed)
    let replaceLevelImage = SKAction.moveByX(self.frame.size.width, y: 0, duration: 0)
    let movingAndReplacingLevelImage = SKAction.repeatAction(SKAction.sequence([moveLevelImage,replaceLevelImage]), count: 2)

    var callCount = 2

    mgImage.runAction(movingAndReplacingLevelImage){ () -> Void in
        if --callCount == 0 {

    mgImage2.runAction(movingAndReplacingLevelImage){ () -> Void in
        if --callCount == 0 {
midGroundlevelMovingSlow(completion: {
    self.foreGroundLevelMovingMedium(completion: {
Completion Handler - Parse + Swift

Completion Handler - Parse + Swift

By : Eng Jia Song
Date : March 29 2020, 07:55 AM
should help you out This is an interesting question. First off, PFQuery basically has a built in completion handler, which is quiet nice! As you probably know, all of the code within the areaQuery.findObjectsInBackgroundWithBlock {...} triggers AFTER the server response. A completion most often serves the purpose of creating a block, with the ability of asynchronously returning data and errors.
Best practice would (IMO) to just call the code that you want to use with the results from your PFQuery right after your area appending loop (which I'm gonna take out because I'm picky like that), like so:
code :
     func loadAreasNew() {
        var areaList = self.areaList
        let areaQuery = PFQuery(className: "Area")
        areaQuery.findObjectsInBackgroundWithBlock {
            (areas: [PFObject]?, error: NSError?) -> Void in
            if error == nil {
                let areasFormatted = areas! As [Areas]
                areasList += areasFormatted
                //Something like this
            } else {
Using completion handler to handle results from calls to firebase

Using completion handler to handle results from calls to firebase

By : Rr Vemula
Date : March 29 2020, 07:55 AM
Hope that helps Here's a simplified change password process.
Assume the user is looking at a viewController with a password text field where the user can type in an updated password.
code :
class ViewController: UIViewController {

  @IBAction func buttonAction(_ sender: Any) {

      let user = FIRAuth.auth()?.currentUser
      let updatedPassword = self.passwordField.text
      user?.updatePassword(updatedPassword, completion: {  error in
         if error != nil {
           print("Error. Show error in current viewController")
         } else {
           print("Login Successful, go to next viewController")
FaceBook SDK3.5 closeAndClearTokenInformation calls completion handler of openActiveSessionWithReadPermissions

FaceBook SDK3.5 closeAndClearTokenInformation calls completion handler of openActiveSessionWithReadPermissions

By : Ben Coleman
Date : March 29 2020, 07:55 AM
help you fix your problem According to this thread on the Facebook Developer bug tracker, this behavior is "by design".
In fact, I did suggest a better name for this method would be: openActiveSessionWithReadPermissions:allowLoginUI:stateChangeHandler:
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