问如何将UI画布定位在与其父游戏对象相同的位置

EN

float remainderAngle;
Image rotAngleWedge;
Image remAngleWedge;

public Image rotateWedgePrefab;
float zRotation = 0f;

public void PieGraph    (float ringRotateAngle, Transform parentTransform)  {

    remainderAngle = 360f - ringRotateAngle;

    rotAngleWedge = Instantiate (rotateWedgePrefab) as Image;
    rotAngleWedge.transform.position = parentTransform.position;
    rotAngleWedge.transform.SetParent (transform, false);
    rotAngleWedge.color = Color.yellow;
    rotAngleWedge.fillAmount = ringRotateAngle / 360f;
    zRotation = Quaternion.Euler (parentTransform.eulerAngles).z - 45.0f;
    rotAngleWedge.transform.rotation = Quaternion.Euler (new Vector3 (0, 0, zRotation));
    zRotation -= rotAngleWedge.fillAmount * 360f;


    remAngleWedge = Instantiate (rotateWedgePrefab) as Image;
    remAngleWedge.transform.position = parentTransform.position;
    remAngleWedge.transform.SetParent (transform, false);
    remAngleWedge.color = Color.white;
    remAngleWedge.fillAmount = remainderAngle / 360f;
    remAngleWedge.transform.rotation = Quaternion.Euler (new Vector3 (0, 0, zRotation));

}