Version: 2017.2

ScrollRect.verticalScrollbar

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public UI.Scrollbar verticalScrollbar ;

Description

Optional Scrollbar object linked to the vertical scrolling of the ScrollRect.

using UnityEngine;
using System.Collections;
using UnityEngine.UI;  // Required when Using UI elements.

public class ExampleClass : MonoBehaviour { public ScrollRect myScrollRect; public Scrollbar newScrollBar;

public void Start() { // Assigns a scroll bar element to the ScrollRect, allowing you to scroll in the vertical axis. myScrollRect.verticalScrollbar = newScrollBar; } }