Posting on Facebook from Facebook's application for IOS. How?

Hello. I make posting to Facebook for IOS.

There is a script that which opens Safari.

 using UnityEngine;
 using System.Collections;
 
 public class facebookScript: MonoBehaviour {
 
 
 const string AppId = "8722581399999999";
 const string ShareUrl = "http://www.facebook.com/dialog/feed";
 
 public static void Sharefb (string link, string pictureLink, string name,
 string caption, string description, string redirectUri)
 {
 Application.OpenURL (ShareUrl +
 "? App_id =" + AppId +
         "& Link =" + WWW.EscapeURL (link) +
         "& Picture =" + WWW.EscapeURL (pictureLink) +
         "& Name =" + WWW.EscapeURL (name) +
         "& Caption =" + WWW.EscapeURL (caption) +
         "& Description =" + WWW.EscapeURL (description) +
         "& Redirect_uri =" + WWW.EscapeURL (redirectUri));
 }
 
 }

I need the same or similar as possible to the application Facebook. I realized that I need to expose this type of link fb://albums, to open from application. I removed all the parameters and was just trying to start open any link, but nothing.

I tried to just open such links: 'fb://friends' and 'fb://publish/?text=some text to post'

Just open the app of Facebook. (standart page)

What do I do wrong? I need install Facebook sdk? What's the Problem?

Help me, please.