ios_fb_sdk_share_button

// for standard dialog which does not take text

        let content: FBSDKShareLinkContent = FBSDKShareLinkContent()
        content.quote = self.movie.overview
        content.contentURL = NSURL(string: "https://www.themoviedb.org/movie/271110-captain-america-civil-war?language=en")
        FBSDKShareDialog.showFromViewController(self, withContent: content, delegate: nil)
        
         // for dialog to open inside app..can include text and image
        let content: FBSDKShareLinkContent = FBSDKShareLinkContent()
        content.contentTitle = self.movie.title
        content.contentDescription = self.movie.overview
        
        content.imageURL = NSURL(string: MovieApiContants.Constants.ImageBaseURL + MovieApiContants.ImageSizeKeys.Poster + movie.posterPath!)
        let dialog : FBSDKShareDialog = FBSDKShareDialog()
        dialog.mode = FBSDKShareDialogMode.Native
        dialog.shareContent = content
        dialog.fromViewController = self
        dialog.delegate = nil
        dialog.show()