Raycast 未检测到自定义 Unity UI 按钮脚本

Question

I have written a custom class to create buttons which can have an animator. But objects of this class are not detectable by raycast but normal Unity UI buttons are detectable by raycast. I'm looking for a solution which can be solved through code.

public class AnimatedButton : UIBehaviour, IPointerClickHandler
{
    [Serializable]
    private class ButtonClickedEvent : UnityEvent
    {
    }

    public bool Interactable = true;

    [SerializeField]
    private ButtonClickedEvent onClick = new ButtonClickedEvent();

    private Animator animator;

    private bool blockInput;

    protected override void Start()
    {
        base.Start();
        animator = GetComponent<Animator>();
    }

    public virtual void OnPointerClick(PointerEventData eventData)
    {
        if (!Interactable || eventData.button != PointerEventData.InputButton.Left)
            return;

        if (!blockInput)
        {
            blockInput = true;
            Press();
            // Block the input for a short while to prevent spamming.
            StartCoroutine(BlockInputTemporarily());
        }
    }

    public void Press()
    {
        if (!IsActive())
            return;

        animator.SetTrigger("Pressed");
        StartCoroutine(InvokeOnClickAction());
    }

    private IEnumerator InvokeOnClickAction()
    {
        yield return new WaitForSeconds(0.1f);
        onClick.Invoke();
    }

    private IEnumerator BlockInputTemporarily()
    {
        yield return new WaitForSeconds(0.5f);
        blockInput = false;
    }
}

below code is used to find the gameobject by firing a raycast

private bool checkButtonClick()
{
    bool flag = false;
    PointerEventData pointer = new PointerEventData(EventSystem.current);
    List<RaycastResult> raycastResult = new List<RaycastResult>();
    
    pointer.position = Input.mousePosition;
    EventSystem.current.RaycastAll(pointer, raycastResult);
    foreach (RaycastResult result in raycastResult)
    {
        if (result.gameObject.GetComponent<Button>() != null || result.gameObject.GetComponent<AnimatedButton>() != null)
        {
            Debug.Log("Button Name : " + result.gameObject.name);
        }
    }
    raycastResult.Clear();
    return flag;
}

Only objects of type "Button" are printed with this log and objects of type "AnimatedButton" are not detected. What could be the issue here and how to solve it?

Answer 1

You're close. But it's not UIBehaviour , it's actually UnityEngine.UI.Graphic , derived from UIBehaviour , that is searched for by the GraphicRaycaster . So you should be able to derive from Graphic , and your new button type will be found in the raycast results. Here's the Unity docs relating to the Graphic class. Quoting that page:

Base class for all visual UI Component.

When creating visual UI components you should inherit from this class.