Getting Started with the Facebook SDK for iOS

• Facebook Login - Authenticate people with their Facebook credentials.
• Share and Send dialogs - Enable sharing content from your app to Facebook.
• App Events - Log events in your application.
• Graph API - Read and write to Graph API.

• A Meta Developer account
• A Meta App ID
• A Client Token
• A project with UIKit App Delegate selected for Life Cycle

1. In Xcode, click File > Swift Packages > Add Package Dependency.
2. In the dialog that appears, enter the repository URL: https://github.com/facebook/facebook-ios-sdk⁠.
   
3. In Version, select Up to Next Major and the default option.
4. Complete the prompts to select the libraries you want to use in your project.

If You Want To	Add This Package to your project
Allow your app to use the Facebook services	FBSDKCoreKit
Allow users to log into your app and for your app to ask for permissions to access data	FBSDKLoginKit
Allow your app to share content on Facebook	FBSDKShareKit
Allow users to log into your app to enable engagement and promote social features	FBSDKGamingServicesKit

1. Right-click Info.plist, and choose Open As ▸ Source Code.
2. Copy and paste the following XML snippet into the body of your file ( <dict>...</dict>).

   <key>CFBundleURLTypes</key>
   <array>
     <dict>
     <key>CFBundleURLSchemes</key>
     <array>
       <string>fbAPP-ID</string>
     </array>
     </dict>
   </array>
   <key>FacebookAppID</key>
   <string>APP-ID</string>
   <key>FacebookClientToken</key>
   <string>CLIENT-TOKEN</string>
   <key>FacebookDisplayName</key>
   <string>APP-NAME</string>
   
3. In <array><string> in the key [CFBundleURLSchemes], replace APP-ID with your App ID.
4. In <string> in the key FacebookAppID, replace APP-ID with your App ID.
5. In <string> in the key FacebookClientToken, replace CLIENT-TOKEN with the value found under Settings > Advanced > Client Token in your App Dashboard.
6. In <string> in the key FacebookDisplayName, replace APP-NAME with the name of your app.
7. To use any of the Facebook dialogs (e.g., Login, Share, App Invites, etc.) that can perform an app switch to Facebook apps, your application's Info.plist also needs to include the following:

   <key>LSApplicationQueriesSchemes</key>
   <array>
     <string>fbapi</string>
     <string>fb-messenger-share-api</string>
   </array>
   

1. Select the + Capability button in the Signing & Capabilities tab when configuring your app target.
2. Find and select the Keychain Sharing capability.
3. Ensure that the Keychain Sharing capability is listed for the target.

// AppDelegate.swift
import UIKit
import FBSDKCoreKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
    ) -> Bool {
        ApplicationDelegate.shared.application(
            application,
            didFinishLaunchingWithOptions: launchOptions
        )

        return true
    }

    func application(
        _ app: UIApplication,
        open url: URL,
        options: [UIApplication.OpenURLOptionsKey : Any] = [:]
    ) -> Bool {
        ApplicationDelegate.shared.application(
            app,
            open: url,
            sourceApplication: options[UIApplication.OpenURLOptionsKey.sourceApplication] as? String,
            annotation: options[UIApplication.OpenURLOptionsKey.annotation]
        )
    }
}

// SceneDelegate.swift
import FBSDKCoreKit
  ...
func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
    guard let url = URLContexts.first?.url else {
        return
    }

    ApplicationDelegate.shared.application(
        UIApplication.shared,
        open: url,
        sourceApplication: nil,
        annotation: [UIApplication.OpenURLOptionsKey.annotation]
    )
}