ANTM/Assets/HeightFixer.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class HeightFixer : MonoBehaviour {
    
    public void FixHeight()
    {
        ((RectTransform)transform).SetHeight(TotalHeight);
    }

    public float TotalHeight
    {
        get
        {
            float totalChildrenHeight = 0.0f;
            foreach (RectTransform tform in transform.GetChilds())
            {
                totalChildrenHeight += tform.GetHeight();
            }
            return totalChildrenHeight + 15;
        }
    }

    //private void Update()
    //{
    //    FixHeight();
    //}
}