title: Swift: UIActivityViewController is empty
body: <p>I trying to create UIActivityViewController. But it appears empty, only with "Copy". No Twitter, no Facebook... Why so? The code is so simple that I don't even know what I do wrong. Could you help me, please.</p>
  
  <pre><code>@IBAction func shareButtonPressed(sender: AnyObject) {
          let textToShare: String! = "GHJFGEgkjfgejkw"
          let activityViewController: UIActivityViewController = UIActivityViewController(activityItems: [textToShare], applicationActivities: nil)
          activityViewController.excludedActivityTypes = [UIActivityTypeAirDrop, UIActivityTypeMessage, UIActivityTypeMail, UIActivityTypePostToTwitter, UIActivityTypePostToFacebook]    
          self.presentViewController(activityViewController, animated: true, completion: nil)
      }
  </code></pre>