在iOS Swift中获取脸书封面照片网址

import FBSDKLoginKit

let loginManager = LoginManager()
loginManager.logIn(permissions: ["public_profile", "user_photos"], from: self) { loginResult in
    switch loginResult {
    case .success(let grantedPermissions, _, let accessToken):
        if grantedPermissions.contains("user_photos") {
            self.getFacebookCoverPhotoURL(accessToken: accessToken)
        }
    case .cancelled:
        print("User cancelled login.")
    case .failed(let error):
        print("Login failed: \(error.localizedDescription).")
    }
}

import FBSDKCoreKit

func getFacebookCoverPhotoURL(accessToken: AccessToken) {
    let graphRequest = GraphRequest(graphPath: "me", parameters: ["fields": "cover"], tokenString: accessToken.tokenString, version: nil, httpMethod: .get)
    
    graphRequest.start { (connection, result, error) in
        if let error = error {
            print("Error fetching cover photo: \(error.localizedDescription).")
            return
        }
        
        guard let result = result as? [String: Any], let cover = result["cover"] as? [String: Any] else {
            print("Error parsing cover photo data.")
            return
        }
        
        if let coverPhotoURLString = cover["source"] as? String {
            let coverPhotoURL = URL(string: coverPhotoURLString)!
            print("Cover photo URL: \(coverPhotoURL)")
        } else {
            print("Error retrieving cover photo URL.")
        }
    }
}