Adding the Facebook Like Button in an iPhone App

Question

Does anyone know how I would include a facbeook \"like button\" in an iphone app. I tried calling the iframe inside of a UIWebView but that doesn\'t work.

Answer 1

Fb like Widget can be embedded in our application. You just have to add a webView and get the Fb Like Widget html code/URL here.

in ViewController.h where you want to add fb like button:

#import 

@interface TestViewController : UIViewController 

@property (strong, nonatomic) UIWebView * fbLikeWebView;

-(void)embedFBLikeButton;

@end

in TestViewController.m

#import "AboutUsViewController.h"

@implementation AboutUsViewController

@synthesize fbLikeWebView = _fbLikeWebView;

- (void)viewDidLoad
{
    [super viewDidLoad];

    //Add this code for FbLike Webview

    self.fbLikeWebView = [[UIWebView alloc] initWithFrame: CGRectMake(100.0, 50.0, 55.0, 70.0)];
    _fbLikeWebView.opaque = NO;
    _fbLikeWebView.backgroundColor = [UIColor clearColor];
    _fbLikeWebView.delegate = self;
    [self.view addSubview:_fbLikeWebView];

    for (UIScrollView *subview in _fbLikeWebView.subviews)
    {
        if ([subview isKindOfClass:[UIScrollView class]]) {
            subview.scrollEnabled = NO;
            subview.bounces = NO;
        }
    }
}

then in ViewWillAppear method call the enbeddFBLikeButton Method to add the fbLike button wigdet on web view:

-(void)viewWillAppear:(BOOL)animated
{
    [self embedFBLikeButton];
    [_fbLikeWebView reload];
}

-(void)embedFBLikeButton
{
    NSString *facebookUrl =  //here paste the url you get from fb developer link above;

    [self.fbLikeWebView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:facebookUrl]]];
}

You conform to UIWebViewDelegate now its turn to defining th edelegate method here:

#pragma mark - WebView Delgate Methods

- (BOOL)webView:(UIWebView *)webview shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    if ([request.URL.lastPathComponent isEqualToString:@"login.php"])
    {
        [self login];

        return NO;
    }

    return YES;
}

-(void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
    [_fbLikeWebView stopLoading];
}

This method for login the user to facebook Account:

- (void)login
{
    [FBSession setActiveSession: [[FBSession alloc] initWithPermissions:@[@"publish_actions", @"publish_stream", @"user_photos"]]];

    [[FBSession activeSession] openWithBehavior: FBSessionLoginBehaviorForcingWebView completionHandler:^(FBSession *session, FBSessionState status, NSError *error) {
        switch (status) {
            case FBSessionStateOpen:
                // call the legacy session delegate
                //Now the session is open do corresponding UI changes
                if (session.isOpen) {
                    FBRequest *me = [FBRequest requestForMe];

                    [me startWithCompletionHandler: ^(FBRequestConnection *connection,
                                                      NSDictionary *my,
                                                      NSError *error) {
                        if (!my) {
                            NSLog(@"Facebook error:\n%@", error.description);
                            [[[UIAlertView alloc] initWithTitle: @"Error"
                                                        message: @"Facebook Login error."
                                                       delegate: self
                                              cancelButtonTitle: @"Ok"
                                              otherButtonTitles: nil, nil] show];
                            return;
                        }
                    }];

                    [_fbLikeWebView reload];

                    [[[UIAlertView alloc] initWithTitle: @""
                                                message: @"Successfully Login. Please click on like button"
                                               delegate: self
                                      cancelButtonTitle: @"Ok"
                                      otherButtonTitles: nil, nil] show];
                }
                break;
            case FBSessionStateClosedLoginFailed:
            {
                [_fbLikeWebView reload];
            }
                break;
            default:
                break; // so we do nothing in response to those state transitions
        }
    }];
}