Initializer is inaccessable due to 'internal' protection level

I have 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

99227

小开

最佳答案

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.

小开

If you are running in to this in code within an XCTestCase, make sure that you have added @testable import My-Awesome-App to the top of your test file.

小开

Add init method as Public access

public init() {}

小开

In case anyone faces this issue when implementing Swift packages for building reusable SwiftUI views, there are a couple of things to keep in mind.

If there are component props that are being set from the parent component, don't forget to add them to the constructor
If the property is wrapped with @State, then assign the state to the underlying object as shown below.

public struct Layout: View {
@State var layout: NavType = .TOP
var navItems: [NavItemObject]
public init(layout: NavType, navItems: [NavItemObject]) {
_layout = State(initialValue: layout);
self.navItems = navItems;
}
}