iOS customHandlerClass example from README

[zwacky]

Hey Michael, first of all thank you for creating and maintaining this great plugin!

I was following the docs to create the iOS Facebook login and had problems with the YourIOsFacebookOAuth2Handler class. I got following two issues and did some changes to make them work again:

Value of type 'AccessToken' has no member 'authenticationToken':

...
if let accessToken = AccessToken.current {
    success(accessToken.authenticationToken)
} else {
...

changed to

if let accessToken = AccessToken.current {
    success(accessToken.tokenString)
} else {
...

Use of unresolved identifier 'ReadPermission'

...
self.loginManager!.logIn(readPermissions: [ ReadPermission.publicProfile ],
...

changed to

self.loginManager!.logIn(permissions: [ Permission.publicProfile ],

I'm new to Capacitor, I'm new to swift. If I'd be more confident in it would have turned into a PR right away. 🙈
What do you think?

[moberwasserlechner]

Hey,

thanks for the reminder :)

I stumbled on this myself but forgot to update the README when I updated to latest version of Facebook pods.

PodFile entry:

  # Add your Pods here
  pod 'FacebookCore'
  pod 'FacebookLogin'

My working handler looks like that

import Foundation
import FacebookCore
import FacebookLogin
import Capacitor
import ByteowlsCapacitorOauth2

@objc class FBOAuth2Handler: NSObject, OAuth2CustomHandler {
    
    var loginManager: LoginManager?;
    
    required override init() {
    }
    
    func getAccessToken(viewController: UIViewController, call: CAPPluginCall, success: @escaping (String) -> Void, cancelled: @escaping () -> Void, failure: @escaping (Error) -> Void) {
        
        if let accessToken = AccessToken.current {
            success(accessToken.tokenString)
        } else {
            DispatchQueue.main.async {
                if self.loginManager == nil {
                    self.loginManager = LoginManager()
                }
            
                self.loginManager!.logIn(permissions: [ .publicProfile ],
                                         viewController: viewController, completion: { loginResult in
                                            switch loginResult {
                                            case .failed(let error):
                                                failure(error)
                                            case .cancelled:
                                                cancelled()
                                            case .success(_, _, let accessToken):
                                                success(accessToken.tokenString)
                                            }
                })
            }
        }
    }
    
    func logout(call: CAPPluginCall) -> Bool {
        self.loginManager?.logOut()
        return true
    }
}

Hope this helps and I will update the README soon.