(client) feat:实现掉落物，UI显示，维度

Client/Assets/Scripts/Entity/Pickup.cs

@@ -1,6 +1,10 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
 using Base;
 using Data;
 using Item;
+using Prefab;
 using UnityEngine;
 
 namespace Entity
@@ -11,6 +15,48 @@ namespace Entity
         protected override void AutoBehave()
         {
         }
+
+        public override void SetTarget(Vector3 pos)
+        {
+            
+        }
+
+        public void Init(ItemDef itemDef)
+        {
+            itemResource = Managers.ItemResourceManager.Instance.GetItem(itemDef.defName);
+            // 预缓存枚举值（避免每次循环重复调用 Enum.GetValues）
+            var states = Enum.GetValues(typeof(EntityState)).Cast<EntityState>().ToArray();
+            // 预初始化字典结构（减少内层循环的字典检查）
+            foreach (var state in states)
+            {
+                bodyNodes.TryAdd(state, new Dictionary<Orientation, GameObject>());
+                bodyAnimationNode.TryAdd(state, new Dictionary<Orientation, ITick[]>());
+            }
+
+            var texture = itemResource.Icon;
+            if (texture.Count == 1)
+            {
+                var imageObj = Instantiate(imagePrefab.gameObject, body.transform);
+                imageObj.transform.localPosition = Vector3.zero;
+                bodyNodes[EntityState.Idle][Orientation.Down] = imageObj;
+                var image = imageObj.GetComponent<ImagePrefab>();
+                image.SetSprite(texture[0]);
+            }
+            else if (texture.Count > 1)
+            {
+                var animatorObj = Instantiate(animatorPrefab.gameObject, body.transform);
+                animatorObj.transform.localPosition = Vector3.zero;
+                bodyNodes[EntityState.Idle][Orientation.Down] = animatorObj;
+                var animator = animatorObj.GetComponent<SpriteAnimator>();
+                animator.SetSprites(texture.ToArray());
+                ITick[] ticks = { animator };
+
+                bodyAnimationNode[EntityState.Idle][Orientation.Down] = ticks;
+            }
+
+            SetBodyTexture(EntityState.Idle, Orientation.Down);
+        }
+
         private void OnTriggerEnter2D(Collider2D other)
         {
             var entity = other.GetComponent<Character>();