Khuong Khuong - 10 days ago 6
Swift Question

initializer is inaccessable due to 'internal' protection level

I have some a protocol

LoginStrategy

public protocol LoginStrategy {
func login(_ viewController: UIViewController)
func getUserInfo(withCompletionHandler completionHandler: @escaping (_ userInfo: [String: Any]?) -> ())
func createLoginButton(_ frame: CGRect, withCompletionHandler completionHandler: @escaping (_ loginButton: UIView) -> ())
func getUserId() -> String
}


and two classes:

LoginProvider

public class LoginProvider {

public let strategy: LoginStrategy

public func login(_ viewController: UIViewController) {
return self.strategy.login(viewController)
}

public func getUserInfo(withCompletionHandler completionHandler: @escaping (_ userInfo: [String: Any]?) -> ()) {
return self.strategy.getUserInfo(withCompletionHandler: completionHandler)
}

public func createLoginButton(_ frame: CGRect, withCompletionHandler completionHandler: @escaping (_ loginButton: UIView) -> ()) {
return self.strategy.createLoginButton(frame, withCompletionHandler: completionHandler)
}

public func getUserId() -> String {
return self.strategy.getUserId()
}

public init(strategy: LoginStrategy) {
self.strategy = strategy
}

}


FacebookLoginStrategy

import Foundation
import FacebookCore
import FacebookLogin

public class FacebookLoginStrategy: LoginStrategy {

public var grantedPermissions: Set<Permission>? = nil

public var declinedPermissions: Set<Permission>? = nil

public var userId: String = ""

public func login(_ viewController: UIViewController) {
let loginManager = LoginManager()
let permissions: [ReadPermission] = [.publicProfile, .userFriends, .email]
loginManager.logIn(permissions, viewController: viewController) { loginResult in
switch loginResult {
case .failed(let error):
print(error)
case .cancelled:
print("User cancelled login.")
case .success(let grantedPermissions, let declinedPermissions, let accessToken):
self.userId = accessToken.userId ?? ""
self.grantedPermissions = grantedPermissions
self.declinedPermissions = declinedPermissions
print("Logged in!")
}
}
}

public func getUserId() -> String {
return userId
}

public func getUserInfo(withCompletionHandler completionHandler: @escaping (_ userInfo: [String: Any]?) -> ()) {
let request = GraphRequest(graphPath: "me", parameters: ["fields":"email, name"], accessToken: AccessToken.current, httpMethod: .GET, apiVersion: FacebookCore.GraphAPIVersion.defaultVersion)
request.start { (response, result) in
switch result {
case .success(let value):
print(value.dictionaryValue)
completionHandler(value.dictionaryValue)
case .failed(let error):
print(error)
}
}
}

public func createLoginButton(_ frame: CGRect, withCompletionHandler completionHandler: @escaping (_ loginButton: UIView) -> ()) {
let permissions: [ReadPermission] = [.publicProfile, .userFriends, .email]
let loginButton = LoginButton(readPermissions: permissions)
loginButton.frame = frame
completionHandler(loginButton)
}
}


in my ViewController:

when I use:

let facebookLoginProvider = LoginProvider(strategy: FacebookLoginStrategy())


it says:


'FacebookLoginStrategy' is inaccessable due to 'internal' protection
level


Please help me with this. Thanks :)

Answer

Just add to your FacebookLoginStrategy:

public init() {}

As long as you do not implement init() explicitly, it is marked as internal by default. You need to overwrite that permission level to be able to instantiate from outside your framework.