由于“内部”保护级别，初始化程序无法访问

本文介绍了由于“内部”保护级别，初始化程序无法访问的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一些协议

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 }

和两个类：

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) } }

在我的 ViewController 中：

当我使用时：

let facebookLoginProvider = LoginProvider(strategy: FacebookLoginStrategy())

它说：

'FacebookLoginStrategy'由于'内部'保护而无法访问 level

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

推荐答案

只需添加到您的FacebookLoginStrategy：

Just add to your FacebookLoginStrategy:

public init() {}

只要如果没有显式实现init（），默认情况下会将其标记为internal。您需要覆盖该权限级别才能从框架外部实例化。

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.