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. publicdelegatevoidVoidDelegate(GameObjectgo);
20. publicVoidDelegateonClick;
21. publicVoidDelegateonDown;
22. publicVoidDelegateonEnter;
23. publicVoidDelegateonExit;
24. publicVoidDelegateonUp;
25. publicVoidDelegateonSelect;
26. publicVoidDelegateonUpdateSelect;
27. publicVoidDelegateonDeSelect;
28. publicVoidDelegateonDrag;
29. publicVoidDelegateonDragEnd;
30. publicVoidDelegateonDrop;
31. publicVoidDelegateonScroll;
32. publicVoidDelegateonMove;
34. publicobjectparameter;
36. publicvoidOnPointerClick(PointerEventDataeventData) { if(onClick!= null)onClick(gameObject);}
37. publicvoidOnPointerDown(PointerEventDataeventData) { if(onDown!= null)onDown(gameObject);}
38. publicvoidOnPointerEnter(PointerEventDataeventData) { if(onEnter!= null)onEnter(gameObject);}
39. publicvoidOnPointerExit(PointerEventDataeventData) { if(onExit!= null)onExit(gameObject);}
40. publicvoidOnPointerUp(PointerEventDataeventData) { if(onUp!= null)onUp(gameObject);}
41. publicvoidOnSelect(BaseEventDataeventData) { if(onSelect!= null)onSelect(gameObject);}
42. publicvoidOnUpdateSelected(BaseEventDataeventData) { if(onUpdateSelect!= null)onUpdateSelect(gameObject);}
43. publicvoidOnDeselect(BaseEventDataeventData) { if(onDeSelect!= null)onDeSelect(gameObject);}
44. publicvoidOnDrag(PointerEventDataeventData) { if(onDrag!= null)onDrag(gameObject);}
45. publicvoidOnEndDrag(PointerEventDataeventData) { if(onDragEnd!= null)onDragEnd(gameObject);}
46. publicvoidOnDrop(PointerEventDataeventData) { if(onDrop!= null)onDrop(gameObject);}
47. publicvoidOnScroll(PointerEventDataeventData) { if(onScroll!= null)onScroll(gameObject);}
48. publicvoidOnMove(AxisEventDataeventData) { if(onMove!= null)onMove(gameObject);}
50. staticpublicUUIEventListenerGet(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(GameObjectgo)
5. {
6. intindex= (int)UUIEventListener.Get(go).parameter;
7. Debug.Log("您单击的索引为："+index);
9. }