在Unity 4.6新增的uGUI中,可以方便地对控件,通过添加EventTrigger脚本来进行添加事件。但是里面并没有包括长按事件,需要自己来实现长按事件。
长按事件
以下是一种实现方式,来自《Handling long press events in uGUI (Unity 4.6)》
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
public class LongPressEventTrigger : UIBehaviour, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler
{
[Tooltip("How long must pointer be down on this object to trigger a long press")]
public float durationThreshold = 1.0f;
public UnityEvent onLongPress = new UnityEvent();
private bool isPointerDown = false;
private bool longPressTriggered = false;
private float timePressStarted;
private void Update()
{
if (isPointerDown && !longPressTriggered)
{
if (Time.time - timePressStarted > durationThreshold)
{
longPressTriggered = true;
onLongPress.Invoke();
}
}
}
public void OnPointerDown(PointerEventData eventData)
{
timePressStarted = Time.time;
isPointerDown = true;
longPressTriggered = false;
}
public void OnPointerUp(PointerEventData eventData)
{
isPointerDown = false;
}
public void OnPointerExit(PointerEventData eventData)
{
isPointerDown = false;
}
}
- 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
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
长按或点击事件
当存在长按事件,又想存在点击事件时,那么就需要判断是否已经执行了长按事件,已经执行了就不能再执行点击事件了,代码如下:
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
public class LongPressOrClickEventTrigger : UIBehaviour, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler, IPointerClickHandler
{
[Tooltip("How long must pointer be down on this object to trigger a long press")]
public float durationThreshold = 1.0f;
public UnityEvent onLongPress = new UnityEvent();
public UnityEvent onClick = new UnityEvent();
private bool isPointerDown = false;
private bool longPressTriggered = false;
private float timePressStarted;
private void Update()
{
if (isPointerDown && !longPressTriggered)
{
if (Time.time - timePressStarted > durationThreshold)
{
longPressTriggered = true;
onLongPress.Invoke();
}
}
}
public void OnPointerDown(PointerEventData eventData)
{
timePressStarted = Time.time;
isPointerDown = true;
longPressTriggered = false;
}
public void OnPointerUp(PointerEventData eventData)
{
isPointerDown = false;
}
public void OnPointerExit(PointerEventData eventData)
{
isPointerDown = false;
}
public void OnPointerClick(PointerEventData eventData)
{
if (!longPressTriggered)
{
onClick.Invoke();
}
}
}
- 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
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
|