SLComposeViewController for Twitter facebook SinaWelbo and TencentWelbo

//- - To Share text on twitter - -
if([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter])
{
        //Tweet
        SLComposeViewController *twitterVC=[SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];
        //To send link together with text
        [twitterVC addURL:[NSURL URLWithString:@"https://twitter.com/IbrahimH_ss_n"]];
        //To add a photo to a link
        [twitterVC addImage:[UIImage imageNamed:@"image"]];
        //Sending link and Image with the tweet
        [twitterVC setInitialText:text];
        /* While adding link and images in a tweet the effective length of a tweet i.e.
        the number of characters which can be entered by the user decreases.
        The default maximum length of a tweet is 140 characters*/
        [self presentViewController:twitterVC animated:YES completion:nil];
}
else
{//Shows alert if twitter is not signed in
       UIAlertController *alertCont=[UIAlertController alertControllerWithTitle:@"SocialShare" message:@"You are not signed in to twitter."preferredStyle:UIAlertControllerStyleAlert];
        [self presentViewController:alertCont animated:YES completion:nil];
        UIAlertAction *okay=[UIAlertAction actionWithTitle:@"Okay" style:UIAlertActionStyleDefault handler:nil];
        [alertCont addAction:okay];
} 
}

if([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook])
{    
    SLComposeViewController *fbVC=[SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
    [fbVC setInitialText:text];
    //To send link together with text
    [fbVC addURL:[NSURL URLWithString:@"https://twitter.com/IbrahimH_ss_n"]];
    //To add a photo to a link
    [fbVC addImage:[UIImage imageNamed:@"image"]];
    [self presentViewController:fbVC animated:YES completion:nil];
}
else
{//Shows alert if twitter is not signed in
       UIAlertController *alertCont=[UIAlertController alertControllerWithTitle:@"SocialShare" message:@"You are not signed in to twitter."preferredStyle:UIAlertControllerStyleAlert];
        [self presentViewController:alertCont animated:YES completion:nil];
        UIAlertAction *okay=[UIAlertAction actionWithTitle:@"Okay" style:UIAlertActionStyleDefault handler:nil];
        [alertCont addAction:okay];
}

//- - SinaWeibo - -
if([SLComposeViewController isAvailableForServiceType:SLServiceTypeSinaWeibo]){
    
    SLComposeViewController *SinaWeiboVC=[SLComposeViewController composeViewControllerForServiceType:SLServiceTypeSinaWeibo];
    [SinaWeiboVC setInitialText:text];
    
    [self presentViewController:SinaWeiboVC animated:YES completion:nil];
}
else
{    
    UIAlertController *alertCont=[UIAlertController alertControllerWithTitle:@"SocialShare" message:@"You are not signed in to SinaWeibo."preferredStyle:UIAlertControllerStyleAlert];
    [self presentViewController:alertCont animated:YES completion:nil];
    UIAlertAction *okay=[UIAlertAction actionWithTitle:@"Okay" style:UIAlertActionStyleDefault handler:nil];
    [alertCont addAction:okay];
}

//- -TencentWeibo text share
if([SLComposeViewController isAvailableForServiceType:SLServiceTypeTencentWeibo])
{    
    SLComposeViewController *tencentWeiboVC=[SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTencentWeibo];
    [tencentWeibo setInitialText:text];
    [self presentViewController:tencentWeibo animated:YES completion:nil];
}
else
{
    UIAlertController *alertCont=[UIAlertController alertControllerWithTitle:@"SocialShare" message:@"You are not signed in to SinaWeibo."preferredStyle:UIAlertControllerStyleAlert];
    [self presentViewController:alertCont animated:YES completion:nil];
    UIAlertAction *okay=[UIAlertAction actionWithTitle:@"Okay" style:UIAlertActionStyleDefault handler:nil];
    [alertCont addAction:okay];
}