twitter_share_swift3.0_.swift

        //check twitter services/account availability
        if SLComposeViewController.isAvailable(forServiceType: SLServiceTypeTwitter) {
            let composer = SLComposeViewController(forServiceType: SLServiceTypeTwitter)
            
            //set sharing text
            composer?.setInitialText(message)
            
            //add image you want to share
            composer?.add(image)
            
            //add url you want to share
            composer?.add(URL(string: "http://www.jaychandra.in")!)
            
            composer?.completionHandler = ({ (status:SLComposeViewControllerResult) in
                switch status {
                case .cancelled:
                    print("cancelled")
                case .done:
                    print("sent'")
                    DispatchQueue.main.async {
                        self.showAlert(title: "Success", message: "Shared successfully")
                    }
                }
            })
            present(composer!, animated: true, completion: nil)
        }else{
            //there is no twitter account linked to the settings
            //show error message to link the twitter account
            print("there is no twitter account linked to the settings")
            self.showAlert(title: "Error", message: "There is no twitter account linked to the settings, please link your account to share.")
        }