ios 由于“内部”保护级别，初始化程序无法访问

Initializer is inaccessable due to 'internal' protection level

提问by Khuong

I have some protocols

我有一些协议

LoginStrategy

登录策略

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:

和两个类：

LoginProvider

登录提供者

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

Facebook登录策略

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:

在我的ViewController 中：

When I use:

当我使用：

let facebookLoginProvider = LoginProvider(strategy: FacebookLoginStrategy())

It says:

它说：

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

由于“内部”保护级别，“FacebookLoginStrategy”无法访问

回答by jboi

Just add to your FacebookLoginStrategy:

只需添加到您的 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.

只要不显式实现 init() ，它默认标记为内部。您需要覆盖该权限级别才能从框架外部实例化。

回答by Alex Zavatone

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

如果您在 XCTestCase 中的代码中遇到此问题，请确保您已将其添加@testable import My-Awesome-App到测试文件的顶部。