UGUI 监听鼠标移入、移出

IPointerEnterHandler

该接口实现方法如下：

public void OnPointerEnter(PointerEventData eventData)
{
    //当鼠标光标移入该对象时触发
}
1
2
3
4

IPointerExitHandler

该接口实现方法如下：

public void OnPointerExit(PointerEventData eventData)
{
    //当鼠标光标移出该对象时触发
}
1
2
3
4

利用 IPointerEnterHandler 和 IPointerExitHandler 接口，当鼠标移动到GameObject与移开，显示文本

public class UIEvent : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
{
    public PointerEvent onPointerEnter = new PointerEvent();
    public PointerEvent onPointerExit = new PointerEvent();

    public void OnPointerEnter(PointerEventData eventData)
    {
        if (onPointerEnter != null)
            onPointerEnter.Invoke(eventData);
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        if (onPointerExit != null)
            onPointerExit.Invoke(eventData);
    }

    [Serializable]
    public class PointerEvent : UnityEvent<PointerEventData>
    {
        public PointerEvent() { }
    }

}

public class UILogComponent : MonoBehaviour
{
    public string displayContext = "";

    void Awake()
    {
        UIEventTrigger et = this.gameObject.AddComponent<UIEventTrigger>();
        et.onPointerEnter.AddListener(OnPointerEnterDisplayMode);
        et.onPointerExit.AddListener(OnPointerExitDisplayMode);
    }

    public void OnPointerEnterDisplayMode(UnityEngine.EventSystems.PointerEventData ed)
    {
        RectTransform rtT = ed.pointerCurrentRaycast.gameObject.GetComponent<RectTransform>();
        Vector3 pos = rtT.position;
        Vector2 size = rtT.sizeDelta;
        LogPanel.Instance.ShowTips(new Vector2(pos.x - size.x / 2, pos.y), displayContext);//在按钮的左侧出现
    }

    public void OnPointerExitDisplayMode(UnityEngine.EventSystems.PointerEventData ed)
    {
        LogPanel.Instance.ShowTips(false);
    }

}

public class LogPanel : MonoBehaviour
{
    public static LogPanel Instance;

    public GameObject goGroup;//当鼠标移动到此与移开时，显示文本
    public Text texTipsContext;//附属于goGroup


    //CustomGroup
    public Text texCustom;
    void Awake()
    {
        Instance = this;
    }

    public void ShowTips(Vector2 worldPos, string context)
    {
        texTipsContext.text = context;


        goGroup.GetComponent<RectTransform>().position = worldPos;

        ShowTips(true);
    }

    public void ShowTips(bool isShow)
    {
        goGroup.SetActive(isShow);
    }

}