Facebook & Twitter share button stopped working [c

问题:

Recently I had it working, but now it just stopped out of nowhere. The buttons do nothing when they are pressed. Thhe code doesn't even give breakpoint or errors. What is wrong?

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- (IBAction)ShareFB
{
    if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook])
    {
        slComposeViewController = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
        [slComposeViewController addImage:[UIImage imageNamed:@"logo-carrito.png"]];
        [slComposeViewController addURL:[NSURL URLWithString:@"http://www.google.com"]];
        [self presentViewController:slComposeViewController animated:YES completion:NULL];
    }
    else {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No FB Account" message:@"There are no FB account registered. Configure one" delegate:nil cancelButtonTitle:@"Dissmiss" otherButtonTitles:nil];
        [alert show];
    }
}

- (IBAction)ShareTW
{
    if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter])
    {
        slComposeViewController = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];
        [slComposeViewController addImage:[UIImage imageNamed:@"logo-carito.png"]];
        [slComposeViewController addURL:[NSURL URLWithString:@"http://www.google.com"]];
        [self presentViewController:slComposeViewController animated:YES completion:NULL];
    }
    else {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No TW Account" message:@"There are no TW accounts registered. Configure one." delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
        [alert show];
    }
}

回答1:

In your storyboard, your first scene has its class set to ViewController, but in actually it should obviously be one of the classes included in your project, e.g. Tab1_ViewController.