UGUI - 长按事件实现

直接上代码：

/*************************************************** * 文件名： UGUI_LongPressListener.cs * 时  间： 2015-12-12 14:42:08 * 作  者： AnYuanLzh ***************************************************/using UnityEngine;using UnityEngine.EventSystems;using UnityEngine.Events;public class UGUI_LongPressListener : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler{       public float interval = 0.5f;    public UnityEvent onLongPress = new UnityEvent();    bool isPressing = false;    int fingerId = -10;    float last_time_press_down = 0f;        // Update is called once per frame    void Update ()    {        ProcessLongPress();    }       void ProcessLongPress()    {        if (isPressing && fingerId != -10)        {            Debug.Log("time: " + (Time.time - last_time_press_down));            if (Time.time - last_time_press_down >= interval)            {                onLongPress.Invoke();                last_time_press_down = Time.time;                isPressing = false;                fingerId = -10;            }        }    }    public void OnPointerDown(PointerEventData eventData)    {        Debug.Log("OnPointerDown");        if (fingerId != -10) return;        isPressing = true;        fingerId = eventData.pointerId;        last_time_press_down = Time.time;    }    public void OnPointerUp(PointerEventData eventData)    {        Debug.Log("OnPointerUp");        if(eventData.pointerId != fingerId) return;        isPressing = false;        last_time_press_down = Time.time;        fingerId = -1;    }    public void OnPointerExit(PointerEventData eventData)    {        Debug.Log("OnPointerExit");        if (eventData.pointerId != fingerId) return;        isPressing = false;        last_time_press_down = Time.time;        fingerId = -1;    }}