/// <summary>
/// 设置箭头显示位置
/// </summary>
/// <param name="_rectTransform">RectTransform</param>
/// <param name="_anchor">锚点</param>
void SetArrowEdge(RectTransform _rectTransform, TextAnchor _anchor)
{
_rectTransform.anchorMin = _rectTransform.anchorMax = _anchor.GetTextAnchorPivot();
switch (_anchor)
{
case TextAnchor.MiddleLeft:
_rectTransform.localEulerAngles = Vector3.zero;
_rectTransform.pivot = new Vector2(1f, 0.5f);
_rectTransform.anchoredPosition = Vector2.zero;
break;
case TextAnchor.MiddleRight:
_rectTransform.localEulerAngles = Vector3.forward * 180f;
_rectTransform.pivot = new Vector2(1f, 0.5f);
_rectTransform.anchoredPosition = Vector2.zero;
break;
case TextAnchor.UpperCenter:
_rectTransform.localEulerAngles = Vector3.forward * -90f;
_rectTransform.pivot = new Vector2(1f, 0.5f);
_rectTransform.anchoredPosition = Vector2.zero;
break;
case TextAnchor.LowerCenter:
_rectTransform.localEulerAngles = Vector3.forward * 90f;
_rectTransform.pivot = new Vector2(1f, 0.5f);
_rectTransform.anchoredPosition = Vector2.zero;
break;
}
}
/// <summary>
/// 从指定的RectTransform对齐位置
/// </summary>
/// <param name="_self">要復制值的RectTransform</param>
/// <param name="_selfAnchor">自身锚点</param>
/// <param name="_selfOffsetPos">自身位置偏移</param>
/// <param name="_from">復制源RectTransform</param>
/// <param name="_fromAnchor">复制源锚点</param>
/// <param name="_fromOffsetPos">复制源锚点偏移</param>
public static void AlignRectTransformFrom(this Graphic _self, TextAnchor _selfAnchor, Vector2 _selfOffsetPos, Graphic _from, TextAnchor _fromAnchor, Vector2 _fromOffsetPos)
{
Vector2 pos = _self.LocalPointToRefer(_from);
Vector2 pivot = _selfAnchor.GetTextAnchorPivot();
pivot = _self.rectTransform.pivot - pivot;
_selfOffsetPos = pivot * _self.rectTransform.sizeDelta + _selfOffsetPos;
pivot = _fromAnchor.GetTextAnchorPivot();
pivot = pivot - _from.rectTransform.pivot;
_fromOffsetPos = pivot * _from.rectTransform.sizeDelta + _fromOffsetPos;
_self.rectTransform.anchoredPosition = pos + _selfOffsetPos + _fromOffsetPos;
}