最近制作一个VR的DEMO 

UGUI 的Button需要加高亮，为了避免两个Button同时高亮，所有写了一个类似于Tougle Group的东西

==ButtonGroup============

public delegate void HighLightOffHandle(GameObject sender);
public class ButtonGroup : MonoBehaviour {

    public event HighLightOffHandle HighLightOffEvent;
    public void Notify(GameObject sender)
    {
        if (HighLightOffEvent != null)
        {
            HighLightOffEvent(sender);
        }
    }

}

public class ButtonSingle : MonoBehaviour {
    public ButtonGroup buttonGroup;
    private bool m_IsOn;
    private void Awake()
    {
        m_IsOn = false;
    }
    private void OnEnable()
    {
        //将按钮注册进按钮组
        if (buttonGroup == null)
            return;
        buttonGroup.HighLightOffEvent += new HighLightOffHandle(HighLightOff);
    }
    private void OnDisable()
    {
        //将按钮移出按钮组
        if (buttonGroup == null)
            return;
        buttonGroup.HighLightOffEvent -= new HighLightOffHandle(HighLightOff);
    }
    //set方法用于设置是否高亮，并发送事件
    public void Set(bool value)
    {
        if (m_IsOn == value)
            return;
        m_IsOn = value;
        if (buttonGroup != null)
        {
            if (m_IsOn)
            {
                buttonGroup.Notify(gameObject);
            }
        }
        ChangeHighlight(true, Color.yellow);
        Debug.Log("lezi");
    }
    private void HighLightOff(GameObject sender)
    {
        m_IsOn = false;
        ChangeHighlight(false, Color.yellow);
    }
    public void ChangeHighlight(bool isHighlight,Color highlightColor)
    {
        Highlighter highlighter;
        if (GetComponent<Highlighter>())
            highlighter = GetComponent<Highlighter>();
        else
            highlighter = gameObject.AddComponent<Highlighter>();
        if (isHighlight)
            highlighter.ConstantOnImmediate(highlightColor);
        else
            highlighter.ConstantOffImmediate();
    }
}