【UGUI】Unity4.6 UI按钮绑定事件（三）

来源：互联网发布：数据恢复美团编辑：程序博客网时间：2024/06/09 19:13

我们会发现Unity4.6 UI新的UI系统中Button默认只提供了Onclick的调用方法，有时我们不仅仅想监听Button的Click事件，同时还需要监听MouseIn（鼠标进入事件）MouseOut（鼠标滑出事件）.
这时我们就需要借助新的UI系统中EventTrigger脚本来实现，下面我们来学习一下，首先我们看一下如何通过EventTrigger来实现按钮点击Click事件.

第一步：通过Hierarchy面板创建button（详细参考Unity4.6 UI按钮绑定事件（一））

第二步：创建一个名为EventHandler的脚本，代码如下

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
usingUnityEngine;
usingSystem.Collections;
usingUnityEngine.UI;
usingUnityEngine.EventSystems;
 
//需要EventTrigger脚本的支援
[RequireComponent(typeof(UnityEngine.EventSystems.EventTrigger))]
publicclass EventHandler : MonoBehaviour
{
 
// Use this for initialization
voidStart()
{
 
Button btn = this.GetComponent<Button>();
UnityEngine.EventSystems.EventTrigger trigger = btn.gameObject.GetComponent<UnityEngine.EventSystems.EventTrigger>();
EventTrigger.Entry entry = newEventTrigger.Entry();
entry.eventID = EventTriggerType.PointerClick;
entry.callback = newEventTrigger.TriggerEvent();
entry.callback.AddListener(Onclick);
 
trigger.delegates.Add(entry);
}
 
privatevoid Onclick(BaseEventData pointData)
{
Debug.Log("Button Clicked");
 
}
 
}

第三步，绑定EventHandler脚本到Button上

然后运行点击按钮就能看到运行的结果了。

如果我们想在Unity4.6 新的UI中实现MouseIn怎么办，很简单我们只需要修改下EventTriggerType.PointerClick事件类型改为EventTriggerType.PointerEnter，同理要监听MouseOut事件只需要修改为EventTriggerType.PointerExit

新的实现代码如下

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
usingUnityEngine;
usingSystem.Collections;
usingUnityEngine.UI;
usingUnityEngine.EventSystems;
 
//需要EventTrigger脚本的支援
[RequireComponent(typeof(UnityEngine.EventSystems.EventTrigger))]
publicclass EventHandler : MonoBehaviour
{
 
// Use this for initialization
voidStart()
{
 
Button btn = this.GetComponent<Button>();
UnityEngine.EventSystems.EventTrigger trigger = btn.gameObject.GetComponent<UnityEngine.EventSystems.EventTrigger>();
EventTrigger.Entry entry = newEventTrigger.Entry();
//鼠标点击事件
//entry.eventID = EventTriggerType.PointerClick;
//鼠标滑出事件
//entry.eventID = EventTriggerType.PointerExit;
//鼠标进入事件
entry.eventID = EventTriggerType.PointerEnter;
entry.callback = newEventTrigger.TriggerEvent();
entry.callback.AddListener(OnMouseEnter);
 
trigger.delegates.Add(entry);
}
 
privatevoid OnMouseEnter(BaseEventData pointData)
{
Debug.Log("Button Enter");
 
}
 
}

阅读全文

0 0