正确使用facebook应用范围的用户ID

Question

有人可以帮我吗？

我的应用程序，在Facebook上注册并设置为“实时”，有一个应用程序ID，一个密钥和一个令牌客户端。在我的应用程序中，用户A在脸书上执行登录，我得到IdA（这是应用程序范围的）。在我的应用程序中，用户B在Facebook上执行登录，我得到的IdB仍然是应用程序范围的。

现在，每当我尝试获取用户配置文件图片时，都会出现错误。这是我为用户A尝试的，用户B也一样：

https://graph.facebook.com/IdA/picture?type=small

https://graph.facebook.com/IdA/picture?access_token=appID“消息”:“无效的OAuth访问令牌。”，“类型”:“OAuthException”，“代码”:190 https://graph.facebook.com/IdA/picture?access_token=Token客户端“消息”:“无效的OAuth访问令牌。”，“类型”:“OAuthException”，“代码”:190

有人能解释一下吗？提前谢谢

Answer 1

您需要授予权限，然后需要调用图形API（FBSDKGraphRequest）来获取配置文件图像。我已经准备了一门课，你可以通过这门课达到你的要求：

import UIKit
import FBSDKCoreKit
import FacebookCore
import FacebookLogin

class LoginWithFacebook {

    // MARK: - Properties
    static let sharedInstance = LoginWithFacebook()


    /**
     Takes user to the facebook login page so that user could login with his facebook credentials and brings back basic details of the user and photo album
     - parameter viewControl: controller on which the facebook page will be opened
     - parameter completion: on completion the method returns user info in the form of dictionary
     */
    public func fBLoginWithPhotoAlbum(viewControl: UIViewController, completion: @escaping ([String: Any]) -> Void) {

        var responseDictionary: [String: Any] = [String: Any]()
        let loginManager = LoginManager()

        loginManager.logIn(readPermissions: [.publicProfile, .email, .userFriends, .custom("user_birthday")], viewController: viewControl) { (loginResult) in
            print(loginResult)
            switch loginResult {
            case .failed(let error):
                print(error)

            case .success(grantedPermissions: _, declinedPermissions: _, token: let accessToken) :

                responseDictionary.updateValue(accessToken.authenticationToken, forKey: "accessToken")

                let param = ["fields": "first_name, last_name, picture.width(9999), email, friends, gender, age_range, birthday, photos{album,picture}"]
                FBSDKGraphRequest.init(graphPath: "me", parameters: param).start { (_, result, _) -> Void in

                    if let resultDictionary: NSDictionary = result as? NSDictionary {
                        responseDictionary.updateValue(resultDictionary, forKey: "userInfo")

                        FBSDKGraphRequest.init(graphPath: "me/albums", parameters: ["fields": "photos{picture}"], httpMethod: "GET").start(completionHandler: { (_, result, _) in

                            let data = (result as? NSDictionary)?.value(forKey: "data") as? NSArray
                            if (data?.count)! > 0 {
                                var profileAlbum: [Any] = data!.filter { NSPredicate(format: "(name == %@) ", "Profile Pictures").evaluate(with: $0) }
                                if profileAlbum.count > 0 {
                                    if let profilePicAlbum = profileAlbum[0] as? NSDictionary {
                                        let graphPath = profilePicAlbum.value(forKey: "id")

                                        //picture, "photos{link}"
                                        let param = ["fields": "photos{picture}"]
                                        FBSDKGraphRequest.init(graphPath: graphPath as? String, parameters: param, httpMethod: "GET").start(completionHandler: { (_, result, _) in
                                            if let profilePicArray = (result as? NSDictionary)?.value(forKeyPath: "photos.data") {
                                                responseDictionary.updateValue(profilePicArray, forKey: "profilePics")
                                                completion(responseDictionary)
                                            }
                                        })
                                    }
                                }
                            } else {
                                completion(responseDictionary)
                            }
                        })

                    } else {

                    }
                }

            case .cancelled :
                completion(["message": "Something Went Wrong"])
            }

        }
    }
}