清理项目目录，引入 InputModule 做多平台输入适配

Assets/Plugins/InputModule/Presentation/JoystickPack/Joysticks/DynamicJoystick.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.EventSystems;
+
+public class DynamicJoystick : Joystick
+{
+    public float MoveThreshold { get { return moveThreshold; } set { moveThreshold = Mathf.Abs(value); } }
+
+    [SerializeField] private float moveThreshold = 1;
+
+    protected override void Start()
+    {
+        MoveThreshold = moveThreshold;
+        base.Start();
+        background.gameObject.SetActive(false);
+    }
+
+    public override void OnPointerDown(PointerEventData eventData)
+    {
+        background.anchoredPosition = ScreenPointToAnchoredPosition(eventData.position);
+        background.gameObject.SetActive(true);
+        base.OnPointerDown(eventData);
+    }
+
+    public override void OnPointerUp(PointerEventData eventData)
+    {
+        background.gameObject.SetActive(false);
+        base.OnPointerUp(eventData);
+    }
+
+    protected override void HandleInput(float magnitude, Vector2 normalised, Vector2 radius, Camera cam)
+    {
+        if (magnitude > moveThreshold)
+        {
+            Vector2 difference = normalised * (magnitude - moveThreshold) * radius;
+            background.anchoredPosition += difference;
+        }
+        base.HandleInput(magnitude, normalised, radius, cam);
+    }
+}

Assets/Plugins/InputModule/Presentation/JoystickPack/Joysticks/DynamicJoystick.cs.meta

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Assets/Plugins/InputModule/Presentation/JoystickPack/Joysticks/FixedJoystick.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class FixedJoystick : Joystick
+{
+
+}

Assets/Plugins/InputModule/Presentation/JoystickPack/Joysticks/FixedJoystick.cs.meta

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Assets/Plugins/InputModule/Presentation/JoystickPack/Joysticks/FloatingJoystick.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.EventSystems;
+
+public class FloatingJoystick : Joystick
+{
+    protected override void Start()
+    {
+        base.Start();
+        background.gameObject.SetActive(false);
+    }
+
+    public override void OnPointerDown(PointerEventData eventData)
+    {
+        background.anchoredPosition = ScreenPointToAnchoredPosition(eventData.position);
+        background.gameObject.SetActive(true);
+        base.OnPointerDown(eventData);
+    }
+
+    public override void OnPointerUp(PointerEventData eventData)
+    {
+        background.gameObject.SetActive(false);
+        base.OnPointerUp(eventData);
+    }
+}

Assets/Plugins/InputModule/Presentation/JoystickPack/Joysticks/FloatingJoystick.cs.meta

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Assets/Plugins/InputModule/Presentation/JoystickPack/Joysticks/VariableJoystick.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.EventSystems;
+
+public class VariableJoystick : Joystick
+{
+    public float MoveThreshold { get { return moveThreshold; } set { moveThreshold = Mathf.Abs(value); } }
+
+    [SerializeField] private float moveThreshold = 1;
+    [SerializeField] private JoystickType joystickType = JoystickType.Fixed;
+
+    private Vector2 fixedPosition = Vector2.zero;
+
+    public void SetMode(JoystickType joystickType)
+    {
+        this.joystickType = joystickType;
+        if(joystickType == JoystickType.Fixed)
+        {
+            background.anchoredPosition = fixedPosition;
+            background.gameObject.SetActive(true);
+        }
+        else
+            background.gameObject.SetActive(false);
+    }
+
+    protected override void Start()
+    {
+        base.Start();
+        fixedPosition = background.anchoredPosition;
+        SetMode(joystickType);
+    }
+
+    public override void OnPointerDown(PointerEventData eventData)
+    {
+        if(joystickType != JoystickType.Fixed)
+        {
+            background.anchoredPosition = ScreenPointToAnchoredPosition(eventData.position);
+            background.gameObject.SetActive(true);
+        }
+        base.OnPointerDown(eventData);
+    }
+
+    public override void OnPointerUp(PointerEventData eventData)
+    {
+        if(joystickType != JoystickType.Fixed)
+            background.gameObject.SetActive(false);
+
+        base.OnPointerUp(eventData);
+    }
+
+    protected override void HandleInput(float magnitude, Vector2 normalised, Vector2 radius, Camera cam)
+    {
+        if (joystickType == JoystickType.Dynamic && magnitude > moveThreshold)
+        {
+            Vector2 difference = normalised * (magnitude - moveThreshold) * radius;
+            background.anchoredPosition += difference;
+        }
+        base.HandleInput(magnitude, normalised, radius, cam);
+    }
+}
+
+public enum JoystickType { Fixed, Floating, Dynamic }

Assets/Plugins/InputModule/Presentation/JoystickPack/Joysticks/VariableJoystick.cs.meta

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