NGUI中LabelA停靠LabelB的方法

详情看 http://note.youdao.com/noteshare?id=ec901d56341207052b2d19233b5ddba3

这里仅仅贴出文字，完整内容请看上面链接。

有这样一个需求：让LabelA停靠在LabelB的某个位置，同时要适应labelA的变化的长度。

 

1. LabelA和LabelB的OverFlow方式是ResizeFreely，使Label的尺寸能够变化。

2. 根据公式得到labelB的位置：

labelB.anchoredposition

= labelA.anchoredposition - labelA.pivot*labelA.size （此时指向labelA的左下角位置）

+ harborAnchor*labelA.size （harborAnchor是归一化的位置值，(1,1)labelA的右上角）

+ AbsoluteOffset（绝对偏移）

3. 需要设置labelB的pivot，例如如果想要让labelB如上图所示停靠在labelA的底线上且是右侧且有一个绝对偏移值(10,0)，则将labelB的widget的pivot设置为左下。将harborAnchor设置为(1,0)。

 

▼代码开始

 

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

 

 

public class UILabelDock: MonoBehaviour

{

    public const string Specification = "将某UI停靠在某个Label（称为HarborLabel）的HarborAnchor处，这两个UI需要在同一个GameObject下";

 

    public UILabel m_HarborLabel = null;

 

    [Tooltip("设置港口Widget的锚点，港口Widget内容区域的左下角是(0,0)，右上角是(1,1)")]

    public Vector2 m_HarborAnchor = new Vector2(1, 0.5f);

 

    RectTransform m_MyRectTransform = null;

    RectTransform m_HarborTransform = null;

    UIWidget m_HarborWidget = null;

 

    [Tooltip("绝对偏移值")]

    public Vector2 m_AbsoluteOffset = new Vector2(0, 0);

 

    private void Awake()

    {

        m_MyRectTransform = GetComponent<RectTransform>();

        m_HarborTransform = m_HarborLabel.GetComponent<RectTransform>();

        m_HarborWidget = m_HarborLabel.GetComponent<UIWidget>();

    }

   

    public void RefreshDock()

    {

        Awake();

        if (m_HarborLabel == null || m_MyRectTransform == null || m_HarborWidget == null || m_HarborTransform)

        {

            Debug.LogError("LabelDock Error");

            return;

        }

 

        //需要确保

        m_MyRectTransform.anchorMax = m_HarborTransform.anchorMax;

        m_MyRectTransform.anchorMin = m_HarborTransform.anchorMin;

        m_MyRectTransform.offsetMax = m_HarborTransform.offsetMax;

        m_MyRectTransform.offsetMin = m_HarborTransform.offsetMin;

        m_MyRectTransform.pivot = m_HarborTransform.pivot;

        m_MyRectTransform.sizeDelta = m_HarborTransform.sizeDelta;

 

        var normalizedOffset = new Vector2(0, 0);

        switch (m_HarborWidget.pivot)

        {

            case UIWidget.Pivot.Bottom:

                {

                    normalizedOffset = new Vector2(0.5f, 0);

                    break;

                }

            case UIWidget.Pivot.BottomLeft:

                {

                    normalizedOffset = new Vector2(0, 0);

                    break;

                }

            case UIWidget.Pivot.BottomRight:

                {

                    normalizedOffset = new Vector2(1, 0);

                    break;

                }

            case UIWidget.Pivot.Center:

                {

                    normalizedOffset = new Vector2(.5f, .5f);

                    break;

                }

            case UIWidget.Pivot.Left:

                {

                    normalizedOffset = new Vector2(0, .5f);

                    break;

                }

            case UIWidget.Pivot.Right:

                {

                    normalizedOffset = new Vector2(1, .5f);

                    break;

                }

            case UIWidget.Pivot.Top:

                {

                    normalizedOffset = new Vector2(.5f, 1);

                    break;

                }

            case UIWidget.Pivot.TopLeft:

                {

                    normalizedOffset = new Vector2(0, 1);

                    break;

                }

            case UIWidget.Pivot.TopRight:

                {

                    normalizedOffset = new Vector2(1, 1);

                    break;

                }

        }

 

        normalizedOffset = m_HarborAnchor - normalizedOffset;

        m_MyRectTransform.anchoredPosition = m_HarborTransform.anchoredPosition + new Vector2(normalizedOffset.x * m_HarborLabel.printedSize.x, normalizedOffset.y * m_HarborLabel.printedSize.y) + m_AbsoluteOffset;

    }

}

 

 

▲代码结束