UGUI（四）事件系統的封裝

UGUI的事件系統預設使用時，是需要目前的類繼承事件接口，就可以在該類中加入它的事件方法，但是在多人開發時這種方式沒什麼好處。

用過NGUI的或許都知道UIEventListener這個類，因為使用超級友善，直接加入UI對象進行事件注冊即可。其實UGUI也可以模仿這種方式進行封裝。

代碼如下：

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. onDown;
22. onEnter;
23. onExit;
24. onUp;
25. onSelect;
26. onUpdateSelect;
27. onDeSelect;
28. onDrag;
29. onDragEnd;
30. onDrop;
31. onScroll;
32. onMove;

33. publicobject

    parameter;

34. publicvoidOnPointerClick(PointerEventDataeventData) {

    if(onClick!=

    null)onClick(gameObject);

    }

35. publicvoidOnPointerDown(PointerEventDataeventData) {

    if(onDown!=

    null)onDown(gameObject);

36. publicvoidOnPointerEnter(PointerEventDataeventData) {

    if(onEnter!=

    null)onEnter(gameObject);

37. publicvoidOnPointerExit(PointerEventDataeventData) {

    if(onExit!=

    null)onExit(gameObject);

38. publicvoidOnPointerUp(PointerEventDataeventData) {

    if(onUp!=

    null)onUp(gameObject);

39. publicvoidOnSelect(BaseEventDataeventData) {

    if(onSelect!=

    null)onSelect(gameObject);

40. publicvoidOnUpdateSelected(BaseEventDataeventData) {

    if(onUpdateSelect!=

    null)onUpdateSelect(gameObject);

41. publicvoidOnDeselect(BaseEventDataeventData) {

    if(onDeSelect!=

    null)onDeSelect(gameObject);

42. publicvoidOnDrag(PointerEventDataeventData) {

    if(onDrag!=

    null)onDrag(gameObject);

43. publicvoidOnEndDrag(PointerEventDataeventData) {

    if(onDragEnd!=

    null)onDragEnd(gameObject);

44. publicvoidOnDrop(PointerEventDataeventData) {

    if(onDrop!=

    null)onDrop(gameObject);

45. publicvoidOnScroll(PointerEventDataeventData) {

    if(onScroll!=

    null)onScroll(gameObject);

46. publicvoidOnMove(AxisEventDataeventData) {

    if(onMove!=

    null)onMove(gameObject);

47. staticpublicUUIEventListener

    Get(GameObject go)

49. UUIEventListenerlistener

    = go.GetComponent();

50. if(listener==

    null)listener

    = go.AddComponent();

51. returnlistener;

使用方式：

1. UUIEventListener.Get(btn.gameObject).onClick=

   OnClickBtn;

2. UUIEventListener.Get(btn.gameObject).parameter=

   index;

3. privatevoidOnClickBtn(GameObject

   go)

5. intindex= (

   int)UUIEventListener.Get(go).parameter;

6. Debug.Log("您單擊的索引為："+

   index);