c# - 通过代码使用 Anchor Presets 定位 UI 元素

Question

当我们在 Unity 中定位 UI 元素时，我们从 anchor 预设中固定位置，以便它的位置正确放置在 Canvas 上。

我们选择顶部、中间、底部、拉伸(stretch)和蓝色点。

如果我在 C# 代码中创建 UI 元素，我该如何做同样的事情？

我做

Texture2D textureWhite = new Texture2D(1, 1);
textureWhite.SetPixel(0, 0, Color.white);
textureWhite.Apply(); 

如何固定为左上角和蓝色圆点？

Answer 1

UI 对象的 RectTransform 的 anchors(min,max) 值和轴心点值决定了 UI 蓝色点的位置。

如果您按住 Shift 键并单击每个预设，您将在下图中圈出的属性发生变化。然后您可以复制每个变量并将它们放入代码中。

这些属性由脚本通过 RectTransform.anchorMin、RectTransform.anchorMax 和 RectTransform.pivot 控制。

不确定您问题中的 Texture2D 代码与此有什么关系，但下面是设置每个预设的函数:

//------------Top-------------------
void topLeft(GameObject uiObject)
{
    RectTransform uitransform = uiObject.GetComponent<RectTransform>();

    uitransform.anchorMin = new Vector2(0, 1);
    uitransform.anchorMax = new Vector2(0, 1);
    uitransform.pivot = new Vector2(0, 1);
}

void topMiddle(GameObject uiObject)
{
    RectTransform uitransform = uiObject.GetComponent<RectTransform>();

    uitransform.anchorMin = new Vector2(0.5f, 1);
    uitransform.anchorMax = new Vector2(0.5f, 1);
    uitransform.pivot = new Vector2(0.5f, 1);
}


void topRight(GameObject uiObject)
{
    RectTransform uitransform = uiObject.GetComponent<RectTransform>();

    uitransform.anchorMin = new Vector2(1, 1);
    uitransform.anchorMax = new Vector2(1, 1);
    uitransform.pivot = new Vector2(1, 1);
}

//------------Middle-------------------
void middleLeft(GameObject uiObject)
{
    RectTransform uitransform = uiObject.GetComponent<RectTransform>();

    uitransform.anchorMin = new Vector2(0, 0.5f);
    uitransform.anchorMax = new Vector2(0, 0.5f);
    uitransform.pivot = new Vector2(0, 0.5f);
}

void middle(GameObject uiObject)
{
    RectTransform uitransform = uiObject.GetComponent<RectTransform>();

    uitransform.anchorMin = new Vector2(0.5f, 0.5f);
    uitransform.anchorMax = new Vector2(0.5f, 0.5f);
    uitransform.pivot = new Vector2(0.5f, 0.5f);
}

void middleRight(GameObject uiObject)
{
    RectTransform uitransform = uiObject.GetComponent<RectTransform>();

    uitransform.anchorMin = new Vector2(1, 0.5f);
    uitransform.anchorMax = new Vector2(1, 0.5f);
    uitransform.pivot = new Vector2(1, 0.5f);
}

//------------Bottom-------------------
void bottomLeft(GameObject uiObject)
{
    RectTransform uitransform = uiObject.GetComponent<RectTransform>();

    uitransform.anchorMin = new Vector2(0, 0);
    uitransform.anchorMax = new Vector2(0, 0);
    uitransform.pivot = new Vector2(0, 0);
}

void bottomMiddle(GameObject uiObject)
{
    RectTransform uitransform = uiObject.GetComponent<RectTransform>();

    uitransform.anchorMin = new Vector2(0.5f, 0);
    uitransform.anchorMax = new Vector2(0.5f, 0);
    uitransform.pivot = new Vector2(0.5f, 0);
}

void bottomRight(GameObject uiObject)
{
    RectTransform uitransform = uiObject.GetComponent<RectTransform>();

    uitransform.anchorMin = new Vector2(1, 0);
    uitransform.anchorMax = new Vector2(1, 0);
    uitransform.pivot = new Vector2(1, 0);
}