Xcode7

-(BOOL) functionName {
    if ([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"fb://]]) {
        NSString *urlString = request.URL.absoluteString;
        
        if ([@https://m.facebook.com/plugins/login_success.php" isEqualToString:urlString]) {
            [self accountStore];
            
            return NO;
        }
        
        return YES:
    }
    
    return YES;
}