【Unity3D / Extension】 扩展方法03 —— 扩展RectTransform

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Unity 扩展方法系列

Unity扩展方法01 —— 扩展Transfrom
Unity扩展方法02 —— 扩展GameObject

Size 尺寸扩展

• 获取UI尺寸

public static Vector2 GetSize(this RectTransform rect)
{
    return rect.rect.size;
}

• 设置UI尺寸的几种常用实现

public static void SetSize(this RectTransform rect, float width, float height)
{
    rect.SetWidth(width);
    rect.SetHeight(height);
}

public static void SetSize(this RectTransform rect, Vector2 size)
{
    rect.SetWidth(size.x);
    rect.SetHeight(size.y);
}

public static void SetWidth(this RectTransform rect, float width)
{
    rect.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, width);
}

public static void SetHeight(this RectTransform rect, float height)
{
    rect.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, height);
}

顶点扩展

• 获取顶点坐标数组
  返回结果的顶点索引为
  左上角：1
  右上角：2
  左下角：0
  右下角：3

public static Vector3[] GetCorners(this RectTransform rect, bool isWorldSpace = true)
{
    var corners = new Vector3[4];
    if (isWorldSpace)
    {
        rect.GetWorldCorners(corners);
    }
    else
    {
        rect.GetLocalCorners(corners);
    }
    return corners;
}

• 获取单个顶点

public static Vector3 GetLeftBottonCorner(this RectTransform rect, bool isWorldSpace = true)
{
    var corners = rect.GetCorners(isWorldSpace);
    return corners[0];
}

public static Vector3 GetLeftTopCorner(this RectTransform rect, bool isWorldSpace = true)
{
    var corners = rect.GetCorners(isWorldSpace);
    return corners[1];
}

public static Vector3 GetRightTopCorner(this RectTransform rect, bool isWorldSpace = true)
{
    var corners = rect.GetCorners(isWorldSpace);
    return corners[2];
}

public static Vector3 GetRightBottonCorner(this RectTransform rect, bool isWorldSpace = true)
{
    var corners = rect.GetCorners(isWorldSpace);
    return corners[3];
}