Swift 5 - Facebook Login: LoginManager() always return cancelled

Question

I follow this tutorial and I got this error msg from xcode, please help.

FBSDKLog: There is already a request for authenticated session. Cancelling active SFAuthenticationSession before starting the new one.

Answer 1

You can do the following...

let manager = LoginManager() // create object of LoginManager class
manager.logOut() //<- Logout if there is any existing session
manager.logIn(permissions: ["public_profile", "email"], from: self) { (result, error) in


   //your code goes here...

}                                                              

Answer 2

The FBLoginButton automatically starts the authentication session. Make sure you aren't calling FBSDKLoginKit.LoginManager().login() as a part of your button action. Instead, conform to LoginButtonDelegate to handle the result from the authentication session that results from the button tap.