未调用OnPointerEnter [英] OnPointerEnter is not being called

问题描述

当我盯着按钮时，我正在尝试对按钮进行动画处理.我得到了以下代码，我在其中从球体进行了Raycast查找它所命中的按钮.

I'm trying to animate the button while it is being gazed on. I have got the following code in which I Raycast from a sphere to find the button that it hits.

var eventDataCurrentPosition = new PointerEventData(EventSystem.current);
        eventDataCurrentPosition.position = screenPosition;

var results = new List<RaycastResult>();

EventSystem.current.RaycastAll(eventDataCurrentPosition, results);

foreach (var result in results)
{
     Debug.Log(result.gameObject.name);
}  

为了使按钮动起来，我在按钮上添加了以下代码.不幸的是，OnPointerEnter或``OnPointerExit从未被调用.

In order to animate the button, I'm adding the following code to the button. Unfortunately, the OnPointerEnter or ``OnPointerExit is never being called.

[RequireComponent(typeof(Button))]
public class InteractiveItem : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
{
    public Image  progressImage;
    public bool   isEntered = false;
    RectTransform rt;
    Button        _button;
    float         timeElapsed;
    Image         cursor;
    float         GazeActivationTime = 5;

// Use this for initialization
void Awake()
{
    _button = GetComponent<Button>();
    rt      = GetComponent<RectTransform>();
}


void Update()
{
    if (isEntered)
    {
        timeElapsed              += Time.deltaTime;
        progressImage.fillAmount =  Mathf.Clamp(timeElapsed / GazeActivationTime, 0, 1);
        if (timeElapsed >= GazeActivationTime)
        {
            timeElapsed = 0;
            _button.onClick.Invoke();
            progressImage.fillAmount = 0;
            isEntered                = false;
        }
    }
    else
    {
        timeElapsed = 0;
    }
}

#region IPointerEnterHandler implementation

public void OnPointerEnter(PointerEventData eventData)
{
    CodelabUtils._ShowAndroidToastMessage("entered");
    isEntered = true;
}

#endregion

#region IPointerExitHandler implementation

public void OnPointerExit(PointerEventData eventData)
{
    CodelabUtils._ShowAndroidToastMessage("exit");

    isEntered                = false;
    progressImage.fillAmount = 0;
}

#endregion
}

我想念什么吗?还是有其他方法可以实现这一目标?

am I missing something ? or is there any other way of achieving this?

推荐答案

我想您的Raycast应该在所有结果上触发OnPointerEnter.

I guess your Raycast supposed to trigger the OnPointerEnter on all results.

您将需要使用 ExecuteEvents.Execute 例如

You will need to use ExecuteEvents.Execute like e.g.

ExecuteEvents.Execute(result.gameObject, eventDataCurrentPosition, ExecuteEvents.pointerEnterHandler);

并且在某些时候还必须调用pointerExitHandler.

And will also at some point have to invoke pointerExitHandler.

因此，我将像这样存储HashSet

I would therefore store a HashSet like

using System.Linq;

private HashSet<GameObject> previousEnters = new HashSet<GameObject>();

...

foreach (var result in results.Select(r => r.gameObject))
{
    Debug.Log(result.name);
    ExecuteEvents.Execute(result, eventDataCurrentPosition, ExecuteEvents.pointerEnterHandler);
    // Store the item so you can later invoke exit on them
    if(!previousEnters.Contains(result)) previousEnters.Add(result);
}  

// This uses Linq in order to get only those entries from previousEnters that are not in the results
var exits = previousEnters.Except(results);
foreach(var item in exits)
{
    if(item) ExecuteEvents.Execute(item, eventDataCurrentPosition, ExecuteEvents.pointerExitHandler);
}

---

您实际上可能想要实现自己的自定义 PointerInputModule .

---

You might actually want to implement your own custom PointerInputModule.

作为入门者，您也可以使用我的答案来回答使用Raycast而不是凝视指针基于Steam的VR Laserpointer的脚本，它可以与3D对象和UI元素进行交互.

As a starter you could also use my answer to Using Raycast instead of Gaze Pointer from a while ago where I created a script based on Steam's VR Laserpointer which allows to interact with 3D objects and UI elements.

注意:在智能手机上输入文字，但我希望这个想法会清楚

这篇关于未调用OnPointerEnter的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！