UGUI（四）事件系统的封装

UGUI的事件系统默认使用时，是需要当前的类继承事件接口，就可以在该类中加入它的事件方法，但是在多人开发时这种方式没什么好处。

用过NGUI的或许都知道UIEventListener这个类，因为使用超级方便，直接加入UI对象进行事件注册即可。其实UGUI也可以模仿这种方式进行封装。

代码如下：

1. usingUnityEngine;
2. usingSystem.Collections;
3. usingUnityEngine.EventSystems;
4. publicclassUUIEventListener : MonoBehaviour,
5. IPointerClickHandler,
6. IPointerDownHandler,
7. IPointerEnterHandler,
8. IPointerExitHandler,
9. IPointerUpHandler,
10. ISelectHandler,
11. IUpdateSelectedHandler,
12. IDeselectHandler,
13. IDragHandler,
14. IEndDragHandler,
15. IDropHandler,
16. IScrollHandler,
17. IMoveHandler
18. {
19. publicdelegate voidVoidDelegate(GameObject go);
20. publicVoidDelegate onClick;
21. publicVoidDelegate onDown;
22. publicVoidDelegate onEnter;
23. publicVoidDelegate onExit;
24. publicVoidDelegate onUp;
25. publicVoidDelegate onSelect;
26. publicVoidDelegate onUpdateSelect;
27. publicVoidDelegate onDeSelect;
28. publicVoidDelegate onDrag;
29. publicVoidDelegate onDragEnd;
30. publicVoidDelegate onDrop;
31. publicVoidDelegate onScroll;
32. publicVoidDelegate onMove;
34. publicobject parameter;
36. publicvoidOnPointerClick(PointerEventData eventData) { if(onClick != null)onClick(gameObject); }
37. publicvoidOnPointerDown(PointerEventData eventData) { if(onDown != null)onDown(gameObject); }
38. publicvoidOnPointerEnter(PointerEventData eventData) { if(onEnter != null)onEnter(gameObject); }
39. publicvoidOnPointerExit(PointerEventData eventData) { if(onExit != null)onExit(gameObject); }
40. publicvoidOnPointerUp(PointerEventData eventData) { if(onUp != null)onUp(gameObject); }
41. publicvoidOnSelect(BaseEventData eventData) { if(onSelect != null)onSelect(gameObject); }
42. publicvoidOnUpdateSelected(BaseEventData eventData) { if(onUpdateSelect != null)onUpdateSelect(gameObject); }
43. publicvoidOnDeselect(BaseEventData eventData) { if(onDeSelect != null)onDeSelect(gameObject); }
44. publicvoidOnDrag(PointerEventData eventData) { if(onDrag != null)onDrag(gameObject); }
45. publicvoidOnEndDrag(PointerEventData eventData) { if(onDragEnd != null)onDragEnd(gameObject); }
46. publicvoidOnDrop(PointerEventData eventData) { if(onDrop != null)onDrop(gameObject); }
47. publicvoidOnScroll(PointerEventData eventData) { if(onScroll != null)onScroll(gameObject); }
48. publicvoidOnMove(AxisEventData eventData) { if(onMove != null)onMove(gameObject); }
50. staticpublicUUIEventListener Get(GameObject go)
51. {
52. UUIEventListenerlistener = go.GetComponent();
53. if(listener == null)listener = go.AddComponent();
54. returnlistener;
55. }
56. }

使用方式：

1. UUIEventListener.Get(btn.gameObject).onClick= OnClickBtn;
2. UUIEventListener.Get(btn.gameObject).parameter= index;
4. privatevoidOnClickBtn(GameObject go)
5. {
6. intindex = (int)UUIEventListener.Get(go).parameter;
7. Debug.Log("您单击的索引为："+ index);
9. }