Unity 给UI注册hover状态的事件

    /// <summary>
    /// button增加鼠标hover的回调
    /// </summary>
    public void AddTrigger(GameObject obj, EventTriggerType triggerType, UnityEngine.Events.UnityAction<BaseEventData> action)
    {
        EventTrigger trigger = obj.GetComponent<EventTrigger>();
        if (trigger == null)
        {
            trigger = obj.AddComponent<EventTrigger>();
        }
        EventTrigger.Entry entry = new EventTrigger.Entry();
        entry.eventID = triggerType;
        entry.callback = new EventTrigger.TriggerEvent();
        entry.callback.AddListener(action);
        trigger.triggers.Add(entry);
    }

　　

 

调用

     AddTrigger(btn.gameObject, EventTriggerType.PointerEnter, (eventData) => { Debug.LogError(eventData.selectedObject); });