c# - 是否有统一的 C# 代码来识别 Button 何时被按下以及何时被释放？

Question

我目前正尝试在 C# 中设置一段代码，用于识别某个按钮何时被按下以及何时被释放

我试图让这个特定的按钮在按下时缩小，在释放时放大

public class clickshake : MonoBehaviour
{
    public GameObject click;
    public void Update()
    {    
        if (Input.GetMouseButtonDown(0))
        {
           transform.localScale += new Vector3(-0.1F, -0.1f, 0);
        }
        if (Input.GetMouseButtonUp(0))
        {
           transform.localScale += new Vector3(0.1F, 0.1f, 0);
        }
    }
}

通过使此脚本专用于其“单击”命令中的按钮它只是增加了按钮的大小，并没有缩小它

Answer 1

making this script exclusive to the button in its On Click command

这没什么意义。尤其是 Update 方法每帧都会被调用。因此，从 onClick 额外调用它会在该帧中调用它两次。同样来自 Button.onClick

Note that EventType.MouseDown and EventType.MouseUp are called prior to onClick.

---

例如，您可以使用 IPointerDownHandler和 IPointerUpHandler实现它的接口(interface)

public class clickshake : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler
{
    //Detect current clicks on the GameObject (the one with the script attached)
    public void OnPointerDown(PointerEventData pointerEventData)
    {
        transform.localScale -= new Vector3(0.1F, 0.1f, 0);
    }

    //Detect if clicks are no longer registering
    public void OnPointerUp(PointerEventData pointerEventData)
    {
        transform.localScale += new Vector3(0.1F, 0.1f, 0);
    }
}

注意

Ensure an EventSystem exists in the Scene to allow click detection. For click detection on non-UI GameObjects, ensure a PhysicsRaycaster is attached to the Camera.

当然，非 UI 对象也需要一个 Collider。