/// <summary>
/// 设置锚点
/// </summary>
public static void SetAnchorType(this RectTransform pRectTransform, RectTransformAnchorType pAnchorType)
{
if (pRectTransform == null)
{
return;
}
KeyValuePair <Vector2, Vector2> tKv = mAnchorTypeDic[pAnchorType];
Vector2 tAnchorMin = tKv.Key;
Vector2 tAnchorMax = tKv.Value;
pRectTransform.anchorMin = tAnchorMin;
pRectTransform.anchorMax = tAnchorMax;
}
/// <summary>
/// 获取锚点位置
/// </summary>
public static KeyValuePair <Vector2, Vector2> GetAnchorTypeValue(RectTransformAnchorType pAnchorType)
{
foreach (var tKv in mAnchorTypeDic)
{
RectTransformAnchorType tAnchorType = tKv.Key;
if (tAnchorType != pAnchorType)
{
continue;
}
return(tKv.Value);
}
return(mAnchorTypeDic[RectTransformAnchorType.None]);
}
/// <summary>
/// 是否是标准锚点， 就是那九个点
/// </summary>
public static bool IsStandAnchorType(this RectTransform pRectTransform)
{
RectTransformAnchorType tAnchorType = pRectTransform.GetAnchorType();
if (tAnchorType == RectTransformAnchorType.TopLeft ||
tAnchorType == RectTransformAnchorType.TopCenter ||
tAnchorType == RectTransformAnchorType.TopRight ||
tAnchorType == RectTransformAnchorType.MiddleLeft ||
tAnchorType == RectTransformAnchorType.MiddleCenter ||
tAnchorType == RectTransformAnchorType.MiddleRight ||
tAnchorType == RectTransformAnchorType.BottomLeft ||
tAnchorType == RectTransformAnchorType.BottomeCenter ||
tAnchorType == RectTransformAnchorType.BottomRight
)
{
return(true);
}
return(false);
}
/// <summary>
/// 获取锚点
/// </summary>
public static RectTransformAnchorType GetAnchorType(this RectTransform pRectTransform)
{
if (pRectTransform == null)
{
return(RectTransformAnchorType.None);
}
foreach (var tKv in mAnchorTypeDic)
{
RectTransformAnchorType tAnchorType = tKv.Key;
Vector2 tAnchorMin = tKv.Value.Key;
Vector2 tAnchorMax = tKv.Value.Value;
if (pRectTransform.anchorMin == tAnchorMin && pRectTransform.anchorMax == tAnchorMax)
{
return(tAnchorType);
}
}
return(RectTransformAnchorType.None);
}
//获取cell 的位置偏移， 目的是使其对位是content 的左上角
private Vector2 GetCellOffsetValue(RectTransform pCell)
{
#if UNITY_EDITOR
if (pCell.IsStandAnchorType() == false)
{
Debug.LogError("cell 的锚点必须是标准的形式， 就是TopLeft, TopCenter ... ... 这种");
}
#endif
RectTransformAnchorType tAnchorType = pCell.GetAnchorType();
Vector2 tAnchorValue = RectTransformExtension.GetAnchorTypeValue(tAnchorType).Key;
Vector2 tTLAnchorValue = RectTransformExtension.GetAnchorTypeValue(RectTransformAnchorType.TopLeft).Key;
Vector2 tAnchorOffset = tTLAnchorValue - tAnchorValue;
Vector2 tAnchorOffsetPos = new Vector2(mRectTransform.rect.width * tAnchorOffset.x, mRectTransform.rect.height * tAnchorOffset.y);
Vector2 tTLPivotValue = new Vector2(0, 1);
Vector2 tPivotOffset = pCell.pivot - tTLPivotValue;
Vector2 tPivotOffsetPos = new Vector2(tPivotOffset.x * pCell.rect.width, tPivotOffset.y * pCell.rect.height);
Vector2 tTotalOffsetPos = new Vector2(tAnchorOffsetPos.x + tPivotOffsetPos.x, tAnchorOffsetPos.y + tPivotOffsetPos.y);
return(tTotalOffsetPos);
}
