uGUIでプログレスバーの動きに合わせて子要素を動かす ref: https://qiita.com/yosizo@github/items/8ce64624f598aab6a672

barAnchor.cs

using UnityEngine;
using UnityEngine.UI;

public class barAnchor : MonoBehaviour 
{
    Image barImage;

    [SerializeField]
    Text textObj;

    [SerializeField]
    RectTransform anchorObj;

    // Use this for initialization
    void Start()
    {
        barImage = GetComponent<Image>();
    }

    // Update is called once per frame
    void Update()
    {
        // イメージのfillAmountを変化させる
        barImage.fillAmount += 0.01f;
        if (barImage.fillAmount >= 1.0f)
        {
            barImage.fillAmount = 0f;
        }
        // テキストを更新
        textObj.text = barImage.fillAmount.ToString("P1");

        // fillAmountの値に合わせてアンカーを更新
        anchorObj.anchorMin = new Vector2(barImage.fillAmount, anchorObj.anchorMin.y);
        anchorObj.anchorMax = new Vector2(barImage.fillAmount, anchorObj.anchorMax.y);
        anchorObj.anchoredPosition = Vector2.zero;
    }
}

circleAnchor.cs

using UnityEngine;
using UnityEngine.UI;

public class circleAnchor : MonoBehaviour 
{
    Image barImage;

    [SerializeField]
    Text textObj;

    [SerializeField]
    RectTransform anchorObj;

    // Use this for initialization
    void Start()
    {
        barImage = GetComponent<Image>();
    }

    // Update is called once per frame
    void Update()
    {
        // イメージのfillAmountを変化させる
        barImage.fillAmount += 0.01f;
        if (barImage.fillAmount >= 1.0f)
        {
            barImage.fillAmount = 0f;
        }
        // テキストを更新
        textObj.text = barImage.fillAmount.ToString("P1");

        // fillAmountの値に合わせてアンカーの角度を更新
        anchorObj.eulerAngles = new Vector3(0, 0, barImage.fillAmount * -360);
    }
}

fillamount.unitypackage