UIActivityViewController not Working With Facebook Login - iphone

Question

I am using UIActivityViewController in my new app for Facebook Share Option.
But if the user not login to the device, it dont working.. When select setting, Login page not appearing..
IActivityViewController *activityVC = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];
activityVC.excludedActivityTypes = #[UIActivityTypeAssignToContact, UIActivityTypePrint];
[self presentViewController:activityVC animated:TRUE completion:nil];
What can i do on this..? Is that the Problem of my code or a Common Error..?

Answer 1

iOS 6 introduced both the UIActivityViewController class and Social Framework, both of which may be used to integrate Twitter, Facebook and Sina Weibo functionality into iOS 6 applications. For general purpose requirements, the UIActivityViewController and SLComposeViewController classes provide an easy to implement path to social network integration.
UIActivityViewController *activityController =[[UIActivityViewController alloc]initWithActivityItems:activityItems applicationActivities:nil];
self presentViewController:activityController animated:YES completion:nil];
In order to use the SLComposeViewController class, a number of steps should be performed in sequence. Firstly, the application may optionally check to verify whether a message can be sent to the specified social network service. This essentially equates to checking if a valid social network account has been configured on the device and is achieved using the isAvailableForServiceType: class method, passing through as an argument the type of service required from the following options:
SLServiceTypeFacebook
SLServiceTypeTwitter
SLServiceTypeSinaWeibo

Answer 2

this is how you start ActivityIndicatorView with Loading lable
UIActivityIndicatorView *tempSpinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
lable =[[UILabel alloc]init];
lable.center = self.view.center;
lable.text = #"Loading...";
lable.hidden=NO;
lable.backgroundColor = [UIColor clearColor];
lable.textColor = [UIColor blackColor];
[lable sizeToFit];
lable.center = CGPointMake(160, 255);
tempSpinner.center = self.view.center;
[self.view addSubview:tempSpinner];
[self.view addSubview:lable];
start where ever you want like this
[tempSpinner startAnimating];
stop it like this where ever you want
[tempSpinner stopAnimating];
hide unhide loading label as per requirement