ReuseItem.cs

using UnityEngine;

[RequireComponent(typeof(RectTransform))]
[DisallowMultipleComponent]
public class ReuseItem : MonoBehaviour {

    private RectTransform rectTransform;
    public int DataIndex = -1;

    void Awake()
    {
        rectTransform = GetComponent<RectTransform>();
    }

    public void UpdateSetDataToItem(ReuseItemData data)
    {
        Debug.LogError("Please implement the 'UpdateSetDataToItem()' method is ReuseItem.cs");
    }

    public void SetAnchors(Vector2 min, Vector2 max)
    {
        rectTransform.anchorMin = min;
        rectTransform.anchorMax = max;
    }

    public void SetOffsetVertical(float top, float bottom)
    {
        rectTransform.offsetMin = new Vector2(rectTransform.offsetMin.x, bottom);
        rectTransform.offsetMax = new Vector2(rectTransform.offsetMax.x, -top);
    }

    public void SetOffsetHorizontal(float left, float right)
    {
        rectTransform.offsetMin = new Vector2(left, rectTransform.offsetMin.y);
        rectTransform.offsetMax = new Vector2(-right, rectTransform.offsetMax.y);
    }

    public float Left
    {
        get
        {
            Vector3[] corners = new Vector3[4];
            rectTransform.GetLocalCorners(corners);
            return rectTransform.anchoredPosition.x + corners[0].x;
        }
        set
        {
            Vector3[] corners = new Vector3[4];
            rectTransform.GetLocalCorners(corners);
            rectTransform.anchoredPosition = new Vector2(value - corners[0].x, 0);
        }
    }

    public float Top
    {
        get
        {
            Vector3[] corners = new Vector3[4];
            rectTransform.GetLocalCorners(corners);
            return rectTransform.anchoredPosition.y + corners[1].y;
        }
        set
        {
            Vector3[] corners = new Vector3[4];
            rectTransform.GetLocalCorners(corners);
            rectTransform.anchoredPosition = new Vector2(0, value - corners[1].y);
        }
    }

    public float Right
    {
        get
        {
            Vector3[] corners = new Vector3[4];
            rectTransform.GetLocalCorners(corners);
            return rectTransform.anchoredPosition.x + corners[2].x;
        }
        set
        {
            Vector3[] corners = new Vector3[4];
            rectTransform.GetLocalCorners(corners);
            rectTransform.anchoredPosition = new Vector2(value - corners[2].x, 0);
        }
    }

    public float Bottom
    {
        get
        {
            Vector3[] corners = new Vector3[4];
            rectTransform.GetLocalCorners(corners);
            return rectTransform.anchoredPosition.y + corners[3].y;
        }
        set
        {
            Vector3[] corners = new Vector3[4];
            rectTransform.GetLocalCorners(corners);
            rectTransform.anchoredPosition = new Vector2(0, value - corners[3].y);
        }
    }
}