ugui动态绑定事件

也许你也跟我一样。喜欢直接这样拖拽。绑定事件

但实际项目中是不这样的。因为很多对象都是动态添加的。然后动态绑定事件。这样才够灵活。所以收集了下面的代码：

 1 using UnityEngine;
 2 using System.Collections;
 3 using UnityEngine.EventSystems;
 4
 5 public class EventClickListener : MonoBehaviour,IPointerClickHandler,IPointerDownHandler,IPointerUpHandler
 6 {
 7     public delegate void VoidDelegate(GameObject go);
 8     public VoidDelegate onClick;
 9     public VoidDelegate onDown;
10     public VoidDelegate onUp;
11     public VoidDelegate onLongClick; // 长按事件
12
13     public object parameter;
14     public object parameterLong;
15     public byte testLongClickFlag = 0; // 用于长按检测，当长按过程中同时进行了拖动，我们将取消长按事件 0:未进行长按检测或长按已经取消 1:正在检测 2:长按已触发
16
17     static public EventClickListener Get(GameObject go)
18     {
19         EventClickListener listener = go.GetComponent<EventClickListener>();
20         if (listener == null) listener = go.AddComponent<EventClickListener>();
21         return listener;
22     }
23
24     public void OnPointerClick(PointerEventData eventData)
25     {
26         if (testLongClickFlag == 2) return; // 长按已经触发，则取消单击事件
27         if (onClick != null) onClick(gameObject);
28     }
29
30     public void OnPointerDown(PointerEventData eventData)
31     {
32         if (onDown != null) onDown(gameObject);
33         if (onLongClick != null)
34         {
35             testLongClickFlag = 1;
36             Invoke("LongClickFunc", 0.5f); // 长按0.5秒钟
37         }
38     }
39
40     public void OnPointerUp(PointerEventData eventData)
41     {
42         if (onUp != null) onUp(gameObject);
43         if (testLongClickFlag == 1)
44         {
45             testLongClickFlag = 0;
46             CancelInvoke("LongClickFunc");
47         }
48     }
49
50     private void LongClickFunc()
51     {
52         testLongClickFlag = 2;
53         if (onLongClick != null) onLongClick(gameObject);
54     }
55 }

第一种。继承相应的接口实现

 1 using UnityEngine;
 2 using System.Collections;
 3 using UnityEngine.EventSystems;
 4
 5 public class EventTriggerListener : UnityEngine.EventSystems.EventTrigger
 6 {
 7     public delegate void VoidDelegate_New(GameObject go, PointerEventData eventData);
 8     public delegate void VoidDelegate(GameObject go);
 9     public VoidDelegate onClick;
10     public VoidDelegate_New onDrag;
11     public VoidDelegate_New onBeginDrag;
12     public VoidDelegate_New onEndDrag;
13     public VoidDelegate_New onDown;
14     public VoidDelegate onEnter;
15     public VoidDelegate onExit;
16     public VoidDelegate_New onUp;
17     public VoidDelegate onSelect;
18     public VoidDelegate onUpdateSelect;
19     public VoidDelegate onLongClick; // 长按事件
20
21     public object parameter;
22     public byte testLongClickFlag = 0; // 用于长按检测，当长按过程中同时进行了拖动，我们将取消长按事件 0:未进行长按检测或长按已经取消 1:正在检测 2:长按已触发
23
24     static public EventTriggerListener Get(GameObject go)
25     {
26         EventTriggerListener listener = go.GetComponent<EventTriggerListener>();
27         if (listener == null) listener = go.AddComponent<EventTriggerListener>();
28         return listener;
29     }
30     public override void OnPointerClick(PointerEventData eventData)
31     {
32         if (testLongClickFlag == 2) return; // 长按已经触发，则取消单击事件
33         if (onClick != null) onClick(gameObject);
34     }
35     public override void OnPointerDown(PointerEventData eventData)
36     {
37         if (onDown != null) onDown(gameObject, eventData);
38         if (onLongClick != null)
39         {
40             testLongClickFlag = 1;
41             Invoke("LongClickFunc", 0.5f); // 长按0.5秒钟
42         }
43     }
44     private void LongClickFunc()
45     {
46         testLongClickFlag = 2;
47         if (onLongClick != null) onLongClick(gameObject);
48     }
49     public override void OnPointerUp(PointerEventData eventData)
50     {
51         if (onUp != null) onUp(gameObject, eventData);
52         if (testLongClickFlag == 1)
53         {
54             testLongClickFlag = 0;
55             CancelInvoke("LongClickFunc");
56         }
57     }
58     public override void OnPointerEnter(PointerEventData eventData)
59     {
60         if (onEnter != null) onEnter(gameObject);
61     }
62     public override void OnPointerExit(PointerEventData eventData)
63     {
64         if (onExit != null) onExit(gameObject);
65     }
66     public override void OnSelect(BaseEventData eventData)
67     {
68         if (onSelect != null) onSelect(gameObject);
69     }
70     public override void OnUpdateSelected(BaseEventData eventData)
71     {
72         if (onUpdateSelect != null) onUpdateSelect(gameObject);
73     }
74     public override void OnDrag(PointerEventData eventData)
75     {
76         //Core.Log.Trace("OnEndDrag: " + eventData.pressPosition.x + "," + eventData.position.x);
77         if (onDrag != null) onDrag(gameObject, eventData);
78         if (testLongClickFlag == 1)
79         {
80             float dx = Mathf.Abs(eventData.position.x - eventData.pressPosition.x);
81             float dy = Mathf.Abs(eventData.position.y - eventData.pressPosition.y);
82             if (dx > 5 || dy > 5) // 如果只是手指抖动，我们不当拖动处理
83             {
84                 testLongClickFlag = 0;
85                 CancelInvoke("LongClickFunc");
86             }
87         }
88     }
89     public override void OnBeginDrag(PointerEventData eventData)
90     {
91         if (onBeginDrag != null) onBeginDrag(gameObject, eventData);
92     }
93     public override void OnEndDrag(PointerEventData eventData)
94     {
95         if (onEndDrag != null) onEndDrag(gameObject, eventData);
96     }
97 }

第二种。继承EventTrigger实现

实际上EventTrigger是继承至IPointerUpHandler接口

1    GameObject message = this.Find("Message").gameObject;//对象
2    EventClickListener.Get(tab).parameter = index;//额外的参数
3    EventClickListener.Get(tab).onClick = DownChangeTab;//回调方法

调用