using UnityEngine;
    using System.Collections;
    using UnityEngine.UI;

    public class ScrollRectSnap : MonoBehaviour {

        ScrollRect scroll;

        bool LerpV;
        float targetV;

        void Start ()
        {
            scroll = gameObject.GetComponent<ScrollRect>();
            scroll.inertia = false;
        }

        void Update()
        {
            if(LerpV)
            {
                scroll.verticalNormalizedPosition = Mathf.Lerp( scroll.verticalNormalizedPosition, targetV, 10*scroll.elasticity*Time.deltaTime);

                if(Mathf.Approximately(scroll.verticalNormalizedPosition, targetV))
                    LerpV = false;
            }
        }
    }