Unity中删除child

for (int i = 0; i < rewardGrid.transform.childCount; i++)
{
    GameObject it = rewardGrid.transform.GetChild(i).gameObject;
    it.transform.parent = null;
    Destroy ( it );
}

或者

while (grid.transform.childCount > 0)
{
    DestroyImmediate(grid.transform.GetChild(0).gameObject);
}