When people log into your app with Facebook, they can grant permissions to your app so you can retrieve information or perform actions on Facebook on their behalf.
The following steps are for adding Facebook Login to your iOS Objective-C project. For adding Facebook Login to a Swift project, see Facebook Login in Swift - Getting Started.
If you link to the SDKs with CocoaPods, you must update your pods for the SDKs your app uses and recompile your app. You can also download the latest version of the Facebook iOS SDK, integrate it into your app, and recompile.
Set up your development environment before using Facebook Login for iOS.
import FBSDKCoreKitimport FacebookCoreinfo.plist) with an XML snippet that contains data about your app. info.plist, and choose Open As Source Code. <dict>...</dict>). info.plist also needs to include: <dict>...</dict>). <key>LSApplicationQueriesSchemes</key> <array> <string>fbapi</string> <string>fbapi20130214</string> <string>fbapi20130410</string> <string>fbapi20130702</string> <string>fbapi20131010</string> <string>fbapi20131219</string> <string>fbapi20140410</string> <string>fbapi20140116</string> <string>fbapi20150313</string> <string>fbapi20150629</string> <string>fbapi20160328</string> <string>fbauth</string> <string>fbauth2</string> <string>fbshareextension</string> </array>
AppDelegate class. This initializes the SDK when your app launches, and lets the SDK handle results from the native Facebook app when you perform a Login or Share action:
// AppDelegate.m
#import <FBSDKCoreKit/FBSDKCoreKit.h>
- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[[FBSDKApplicationDelegate sharedInstance] application:application
didFinishLaunchingWithOptions:launchOptions];
// Add any custom logic here.
return YES;
}
- (BOOL)application:(UIApplication *)application
openURL:(NSURL *)url
options:(NSDictionary<UIApplicationOpenURLOptionsKey,id> *)options {
BOOL handled = [[FBSDKApplicationDelegate sharedInstance] application:application
openURL:url
sourceApplication:options[UIApplicationOpenURLOptionsSourceApplicationKey]
annotation:options[UIApplicationOpenURLOptionsAnnotationKey]
];
// Add any custom logic here.
return handled;
}
SceneDelegate (new for iOS 13 and Xcode 11), you will also need to add the following to that class:
// SceneDelegate.m
#import <FBSDKCoreKit/FBSDKCoreKit.h>
- (void)scene:(UIScene *)scene openURLContexts:(NSSet<UIOpenURLContext *> *)URLContexts {
UIOpenURLContext *openURLContext = URLContexts.allObjects.firstObject;
if (openURLContext) {
[[FBSDKApplicationDelegate sharedInstance] application:UIApplication.sharedApplication
openURL:openURLContext.URL
sourceApplication:openURLContext.options.sourceApplication
annotation:openURLContext.options.annotation];
}
// Add any custom logic here.
}
AppDelegate:
- (BOOL)application:(UIApplication *)application
openURL:(NSURL *)url
sourceApplication:(NSString *)sourceApplication
annotation:(id)annotation {
BOOL handled = [[FBSDKApplicationDelegate sharedInstance] application:application
openURL:url
sourceApplication:sourceApplication
annotation:annotation
];
// Add any custom logic here.
return handled;
}
Use the Facebook Login button in your iOS app.
// Add this to the header of your file, e.g. in ViewController.m
// after #import "ViewController.h"
#import <FBSDKCoreKit/FBSDKCoreKit.h>
#import <FBSDKLoginKit/FBSDKLoginKit.h>
// Add this to the body
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
FBSDKLoginButton *loginButton = [[FBSDKLoginButton alloc] init];
// Optional: Place the button in the center of your view.
loginButton.center = self.view.center;
[self.view addSubview:loginButton];
}
@end[FBSDKAccessToken currentAccessToken]. FBSDKLoginManager sets this token for you and when it sets currentAccessToken it also automatically writes it to a keychain cache. FBSDKAccessToken contains userID which you can use to identify the user. readPermissions property on the FBSDKLoginButton object.