Unity实现UI折叠显示与隐藏

using DG.Tweening;
using UnityEngine.UI;
public class FoldWindow : MonoBehaviour
{
    //折叠方向
    private enum MoveDir
    {
        Left,
        Right
    }
    [SerializeField]
    private Button _showPanelButton;
    [SerializeField]
    private Button _hidePanelButton;
    [Header("折叠方向")]
    [SerializeField]
    private MoveDir _moveToDir;
    private RectTransform _rectTransform;
    private int temp = 0;
    private Tweener _hideTweener = null;

    public RectTransform RectTransform
    {
        get { return _rectTransform; }
    }
    void Awake()
    {