textObject Unity上的onclickevent

Question

因此，我正在尝试在Unity中的文本元素上添加OnclickEvent。（UnityEngine.UI.Text）但是Text对象没有onclick事件处理程序。我很确定这是可能的，否则Unity应该是无法单击文本对象的第一语言。我已经找到

您不能，至少不能直接。使用OnGUI绘制的GUIText无法检测到输入，您必须使用GUI按钮。但是您根本不应该使用OnGUI。新的Unity UI系统是在几个月前发布的，它非常优越。您应该更新到Unity 4.6.3，然后开始使用它。 无法添加onclick事件

但是我只是无法想象它不可能点击文本。出于布局原因，我真的不想使用按钮。

谢谢

Answer 1

您只需使用IPointerClickHandler界面和一个即可创建自己的点击处理程序UnityEvent：

public class TextButton : MonoBehaviour, IPointerClickHandler
{
    // add callbacks in the inspector like for buttons
    public UnityEvent onClick;

    public void OnPointerClick(PointerEventData pointerEventData)
    {
        //Output to console the clicked GameObject's name and the following message. You can replace this with your own actions for when clicking the GameObject.
        Debug.Log(name + " Game Object Clicked!", this);

        // invoke your event
        onClick.Invoke();
    }
}

确保EventSystem场景中存在，以允许单击检测。要在非UI GameObjects上进行点击检测，请确保将PhysicsRaycaster附加到Camera。

或者，您可以使用该EventTrigger组件。

两者基本上都会或多或少地做同一件事：

第一个的巨大优点是您可以轻松地对其进行增强，例如，通过视觉反馈，例如更改按钮的颜色：

[RequireComponent(typeof(Text))]
public class TextButton : MonoBehaviour, IPointerClickHandler, IPointerDownHandler, IPointerUpHandler, IPointerEnterHandler, IPointerExitHandler
{
    #region Inspector

    public Color NormalColor = Color.black;
    public Color HoverColor = Color.black;
    public Color PressColor = Color.black;
    public Color DisabledColor = Color.gray;

    // add callbacks in the inspector like for buttons
    public UnityEvent onClick;

    #endregion Inspector

    private bool _isInteractive = true;
    public bool interactive
    {
        get
        { 
            return _isInteractive; 
        }
        set
        {
            _isInteractive = value;
            UpdateColor();
        }
    }

    private bool _isPressed;
    private bool _isHover;

    private Text _textComponent;
    private Text TextComponent
    {
        get
        {
            if(!_textComponent) _textComponent = GetComponent<Text>() ?? gameObject.AddComponent<Text>();

        }
    }

    private void Updatecolor()
    {
        if (!interactive)
        {
            TextComponent.color = DisabledColor;
            return;
        }

        if (isPressed)
        {
            TextComponent.color = PressColor;
            return;
        }

        if (isHover)
        {
            TextComponent.color = HoverColor;
            return;
        }

        TextComponent.color = NormalColor;
    }

    #region IPointer Callbacks

    public void OnPointerClick(PointerEventData pointerEventData)
    {
        //Output to console the clicked GameObject's name and the following message. You can replace this with your own actions for when clicking the GameObject.
        Debug.Log(name + " Game Object Clicked!", this);

        // invoke your event
        onClick.Invoke();
    }

    public void OnPointerDown(PointerEventData eventData)
    {
       if(!_isHover)return;
        _isPressed = true;
        Updatecolor();
    }

    public void OnPointerUp(PointerEventData eventData)
    {
      if(!_isHover)return;
        _isPressed = false;
        Updatecolor();
    }

    public void OnPointerEnter(PointerEventData eventData)
    {
        _isHover = true;
        Updatecolor();
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        _isHover = false;
        _isPressed = false;
        Updatecolor();
    }

    #endregion IPointer Callbacks
}