using UnityEngine;
public class MatchHeight : MonoBehaviour
{
    public RectTransform childRectTransform;
    public RectTransform parentRectTransform;
    void Update()
    {
        if (parentRectTransform.sizeDelta.y != childRectTransform.sizeDelta.y)
            parentRectTransform.sizeDelta = new Vector2(parentRectTransform.sizeDelta.x, childRectTransform.sizeDelta.y);
    }
}