/// <summary>
/// 相对屏幕适配缩放（会修改锚点为中心）
/// </summary>
/// <param name="policy">适配策略</param>
/// <param name="transform">适配目标</param>
/// <param name="isStretch">是否拉伸, 指按最大缩放比例</param>
public static void Rescale(AdaptPolicy policy, RectTransform transform, bool isStretch = false)
{
float scale = isStretch ? m_scaleM : (scaleMode == ScaleMode.MatchWidth ? m_scaleX : m_scaleY);
transform.localScale = Vector3.one * scale;
transform.anchorMin = Vector2.one * 0.5f;
transform.anchorMax = Vector2.one * 0.5f;
switch (policy)
{
case AdaptPolicy.TopLeft:
transform.localPosition = new Vector3(-Screen.width * 0.5f + transform.sizeDelta.x * scale * 0.5f,
Screen.height * 0.5f - transform.sizeDelta.y * scale * 0.5f, 0);
break;
case AdaptPolicy.TopCenter:
transform.localPosition = new Vector3(0, Screen.height * 0.5f - transform.sizeDelta.y * scale * 0.5f, 0);
break;
case AdaptPolicy.TopRight:
transform.localPosition = new Vector3(Screen.width * 0.5f - transform.sizeDelta.x * scale * 0.5f,
Screen.height * 0.5f - transform.sizeDelta.y * scale * 0.5f, 0);
break;
case AdaptPolicy.MiddleLeft:
transform.localPosition = new Vector3(-Screen.width * 0.5f + transform.sizeDelta.x * scale * 0.5f, 0, 0);
break;
case AdaptPolicy.MiddleCenter:
transform.localPosition = Vector3.zero;
break;
case AdaptPolicy.MiddleRight:
transform.localPosition = new Vector3(Screen.width * 0.5f - transform.sizeDelta.x * scale * 0.5f, 0, 0);
break;
case AdaptPolicy.BottomLeft:
transform.localPosition = new Vector3(-Screen.width * 0.5f + transform.sizeDelta.x * scale * 0.5f,
-Screen.height * 0.5f + transform.sizeDelta.y * scale * 0.5f, 0);
break;
case AdaptPolicy.BottomCenter:
transform.localPosition = new Vector3(0, -Screen.height * 0.5f + transform.sizeDelta.y * scale * 0.5f, 0);
break;
case AdaptPolicy.BottomRight:
transform.localPosition = new Vector3(Screen.width * 0.5f - transform.sizeDelta.x * scale * 0.5f,
-Screen.height * 0.5f + transform.sizeDelta.y * scale * 0.5f, 0);
break;
}
}
/// <summary>
/// 相对关联组件适配位置（会修改锚点为中心）
/// </summary>
/// <param name="target">适配目标</param>
/// <param name="relative">关联目标</param>
/// <param name="policy">适配策略</param>
public static void SetRelativePos(RectTransform target, RectTransform relative, AdaptPolicy policy)
{
Vector2 pos = target.anchoredPosition;
Vector2 p_middle = relative.sizeDelta * 0.5f;
p_middle.x = p_middle.x * relative.localScale.x; p_middle.y = p_middle.y * relative.localScale.y;//考虑到缩放
Vector2 s_middle = target.sizeDelta * 0.5f;
s_middle.x = s_middle.x * target.localScale.x; s_middle.y = s_middle.y * target.localScale.y;
target.anchorMax = Vector2.one * 0.5f; //重置锚点位置为居中
target.anchorMin = Vector2.one * 0.5f;
target.anchoredPosition = Vector2.zero; //重置UI位置为正中
switch (policy)
{
case AdaptPolicy.TopLeft:
pos.x = -(p_middle.x - s_middle.x);
pos.y = (p_middle.y - s_middle.y);
break;
case AdaptPolicy.TopCenter:
pos.x = 0;
pos.y = (p_middle.y - s_middle.y);
break;
case AdaptPolicy.TopRight:
pos.x = (p_middle.x - s_middle.x);
pos.y = (p_middle.y - s_middle.y);
break;
case AdaptPolicy.MiddleLeft:
pos.x = -(p_middle.x - s_middle.x);
pos.y = 0;
break;
case AdaptPolicy.MiddleCenter:
pos.x = 0;
pos.y = 0;
break;
case AdaptPolicy.MiddleRight:
pos.x = (p_middle.x - s_middle.x);
pos.y = 0;
break;
case AdaptPolicy.BottomLeft:
pos.x = -(p_middle.x - s_middle.x);
pos.y = -(p_middle.y - s_middle.y);
break;
case AdaptPolicy.BottomCenter:
pos.x = 0;
pos.y = -(p_middle.y - s_middle.y);
break;
case AdaptPolicy.BottomRight:
pos.x = (p_middle.x - s_middle.x);
pos.y = -(p_middle.y - s_middle.y);
break;
}
target.anchoredPosition = pos;
}