unity Joystick

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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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public class GameManager : MonoBehaviour
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{
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    public UIVirtualJoystick joystick;
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    public Transform trans;
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    public float moveSpeed = 1f;
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    // Start is called before the first frame update
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    void Start() { }
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    // Update is called once per frame
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    void Update()
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    {
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        Vector2 joystickDirection = joystick.direction;
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        Vector3 movement = new Vector2(joystickDirection.x, joystickDirection.y);
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        trans.position += movement * moveSpeed * Time.deltaTime;
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    }
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}

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using UnityEngine;
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using UnityEngine.Events;
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using UnityEngine.EventSystems;
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public class UIVirtualJoystick : MonoBehaviour, IPointerDownHandler, IDragHandler, IPointerUpHandler
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{
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    [System.Serializable]
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    public class Event : UnityEvent<Vector2> { }
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    [Header("Rect References")]
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    public RectTransform containerRect;
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    public RectTransform handleRect;
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    [Header("Settings")]
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    public float magnitudeMultiplier = 1f;
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    public bool invertXOutputValue;
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    public bool invertYOutputValue;
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    public bool useCircularInput = true;
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    [Header("Output")]
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    public Vector2 direction;
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    public Event joystickOutputEvent;
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    private float joystickRadius;
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    private bool isPointerDown = false; // 新增：标记是否在有效点击范围内
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    void Start()
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    {
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        joystickRadius = containerRect.sizeDelta.x * 0.5f;
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        UpdateHandleRectPosition(Vector2.zero);
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    }
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    public void OnPointerDown(PointerEventData eventData)
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    {
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        if (useCircularInput)
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        {
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            isPointerDown = false;
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            RectTransformUtility.ScreenPointToLocalPointInRectangle(
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                containerRect,
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                eventData.position,
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                eventData.pressEventCamera,
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                out Vector2 localPoint
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            );
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            if (localPoint.magnitude > joystickRadius)
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            {
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                return;
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            }
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        }
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        isPointerDown = true;
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        OnDrag(eventData);
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    }
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    public void OnDrag(PointerEventData eventData)
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    {
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        // 如果不在有效点击范围内，则忽略
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        if (!isPointerDown)
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            return;
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        RectTransformUtility.ScreenPointToLocalPointInRectangle(
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            containerRect,
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            eventData.position,
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            eventData.pressEventCamera,
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            out Vector2 position
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        );
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        position = position / joystickRadius;
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        Vector2 clampedPosition = Vector2.ClampMagnitude(position, 1f);
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        Vector2 outputPosition = ApplyInversionFilter(clampedPosition);
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        direction = outputPosition * magnitudeMultiplier;
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        joystickOutputEvent.Invoke(direction);
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        if (handleRect)
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        {
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            UpdateHandleRectPosition(clampedPosition * joystickRadius);
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        }
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    }
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    public void OnPointerUp(PointerEventData eventData)
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    {
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        direction = Vector2.zero;
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        joystickOutputEvent.Invoke(Vector2.zero);
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        if (handleRect)
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        {
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            UpdateHandleRectPosition(Vector2.zero);
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        }
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    }
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    private void UpdateHandleRectPosition(Vector2 newPosition)
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    {
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        handleRect.anchoredPosition = newPosition;
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    }
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    private Vector2 ApplyInversionFilter(Vector2 position)
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    {
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        if (invertXOutputValue)
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        {
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            position.x = -position.x;
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        }
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        if (invertYOutputValue)
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        {
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            position.y = -position.y;
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        }
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        return position;
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    }
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}