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

public class ScrollViewVerticalMoveItem : MonoBehaviour
{
    public ScrollRect scrollRect; // 你需要将 ScrollRect 拖到这里
    public float cellHeight = 100f; // 每个格子的高度，自己根据实际情况设置
    public void MoveDown()
    {
        // 计算目标位置
        float newY = scrollRect.content.anchoredPosition.y + cellHeight;
        // 获取Content的高度和可视区域的高度
        float contentHeight = scrollRect.content.sizeDelta.y;
        float viewportHeight = scrollRect.viewport.rect.height;
        // 确保不超过最大 Y 值
        newY = Mathf.Min(newY, contentHeight - viewportHeight);
        // Smoothly move to the new position
        StartCoroutine(SmoothMove(scrollRect.content.anchoredPosition.y, newY));
    }
    private IEnumerator SmoothMove(float startY, float targetY)
    {
        float elapsedTime = 0.0f;
        float duration = 0.3f; // 移动持续时间
        while (elapsedTime < duration)
        {
            float newY = Mathf.Lerp(startY, targetY, (elapsedTime / duration));
            scrollRect.content.anchoredPosition = new Vector2(scrollRect.content.anchoredPosition.x, newY);
            elapsedTime += Time.deltaTime;
            yield return null;
        }
        // 确保最后位置准确
        scrollRect.content.anchoredPosition = new Vector2(scrollRect.content.anchoredPosition.x, targetY);
    }
}