Joseph Michael Pesch
VP Programming

xCode Facebook Login Integration Using CocoaPods

by 18. November 2018 09:26

Terminal window, navigated to root folder where xCode project exists and run the following commands:

  • $ sudo gem install cocoapods
  • $ pod init

This will create a file named Podfile in your project's root directory. Open the Podfile with a text editor and add the following:

  • pod 'FBSDKLoginKit'

Back in the Terminal window, run the following command:

  • $ pod install 

Register app with Facebook (follow steps in this link: https://developers.facebook.com/docs/facebook-login/ios/)

Configure the information property list file (info.plist) with an XML snippet that contains data about your app. Right-click info.plist, and choose Open As Source Code. Copy and paste the following XML snippet into the body of your file ( ...)

<key>CFBundleURLTypes</key>
<array>
  <dict>
  <key>CFBundleURLSchemes</key>
  <array>
    <string>fb[APP_ID]</string>
  </array>
  </dict>
</array>
<key>FacebookAppID</key>
<string>[APP_ID]</string>
<key>FacebookDisplayName</key>
<string>[APP_NAME]</string>

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:

<key>LSApplicationQueriesSchemes</key>
<array>
  <string>fbapi</string>
  <string>fb-messenger-share-api</string>
  <string>fbauth2</string>
  <string>fbshareextension</string>
</array>

Go to the Project Navigator in Xcode and select your project to see project settings. Select Other Linker Flags for editing. Add the flag -ObjC to Other Linker Flags for all build targets. NOTE: Use the find feature to easily locate the Other Linker Flags in the settins area.

If you still have the xCode project open close it. Open the new Workspace that should have been created in the same root folder as the project (e.g. MyApp.xcodeproj should now have a MyApp.xcworkspace partner).

Update the applications AppDelegate method to include the FBSDKLoginKit import reference and methods with FBSDKApplicationDelegate and FBSDKAppEvents (sample shown below).

import UIKit
import FBSDKLoginKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.

        // FaceBook
        return FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)
    }
    
    func applicationWillResignActive(_ application: UIApplication) {
        // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
        // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.

        // FaceBook
        FBSDKAppEvents.activateApp()
    }
    
    func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
        return FBSDKApplicationDelegate.sharedInstance().application(application, open: url, sourceApplication: sourceApplication, annotation: annotation)
    }


    func applicationDidEnterBackground(_ application: UIApplication) {
        // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
        // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
    }

    func applicationWillEnterForeground(_ application: UIApplication) {
        // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
    }

    func applicationDidBecomeActive(_ application: UIApplication) {
        // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
    }

    func applicationWillTerminate(_ application: UIApplication) {
        // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
    }


}

Build Project for Running to make sure everything compiles correctly.

 

Tags:

Facebook | XCode