在iOS Swift中获取脸书封面照片网址

import FBSDKCoreKit

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    ApplicationDelegate.shared.application(application, didFinishLaunchingWithOptions: launchOptions)
    return true
}

import FBSDKLoginKit

func getFacebookCoverPhoto() {
    let graphRequest = GraphRequest(graphPath: "me", parameters: ["fields": "cover"])
    graphRequest.start { (connection, result, error) in
        if let error = error {
            print("Error: \(error.localizedDescription)")
        } else if let result = result as? [String: Any], let cover = result["cover"] as? [String: Any], let source = cover["source"] as? String {
            print("Cover photo URL: \(source)")
        }
    }
}

// 调用该方法获取封面照片
getFacebookCoverPhoto()