初始化工程

UnityGame/Assets/Scripts/GameLogic/Tools/AssetBundle/AddressableUpdater.cs

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+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.AddressableAssets;
+using UnityEngine.AddressableAssets.ResourceLocators;
+using UnityEngine.ResourceManagement.ResourceLocations;
+using UnityEngine.ResourceManagement.AsyncOperations;
+using UnityEngine.ResourceManagement.ResourceProviders;
+
+public class AddressableUpdater : MonoBehaviour
+{
+    public string remoteCatalogUrl;  // CDN catalog 路径
+
+    public Action<float> OnProgressChanged;     // 进度更新回调 0~1
+    public Action<float> OnSpeedChanged;        // 下载速度更新 (KB/s)
+    public Action<float> OnDownloadSizeFetched; // 总下载大小回调 (MB)
+    public Action OnCompleted;                  // 下载完成
+
+    private float lastDownloadedBytes = 0;
+    private float updateCheckInterval = 0.5f;
+
+    void Start()
+    {
+        StartCoroutine(UpdateAddressables());
+    }
+
+    IEnumerator UpdateAddressables()
+    {
+        // 1. 初始化 Addressables
+        var initHandle = Addressables.InitializeAsync();
+        yield return initHandle;
+
+        // 2. 更新 Catalog
+        var catalogHandle = Addressables.UpdateCatalogs();
+        yield return catalogHandle;
+
+        List<IResourceLocator> catalogs = catalogHandle.Result;
+
+        // 3. 获取资源下载大小
+        var sizeHandle = Addressables.GetDownloadSizeAsync(Addressables.ResourceManager.ResourceProviders);
+        yield return sizeHandle;
+
+        long totalDownloadSize = sizeHandle.Result;
+
+        if (totalDownloadSize <= 0)
+        {
+            Debug.Log("无需更新");
+            OnCompleted?.Invoke();
+            yield break;
+        }
+
+        OnDownloadSizeFetched?.Invoke(totalDownloadSize / (1024f * 1024f)); // MB
+
+        // 4. 开始下载所有资源
+        var downloadHandle = Addressables.DownloadDependenciesAsync(Addressables.ResourceManager.ResourceProviders, true);
+        StartCoroutine(TrackDownloadProgress(downloadHandle, totalDownloadSize));
+        yield return downloadHandle;
+
+        if (downloadHandle.Status == AsyncOperationStatus.Succeeded)
+        {
+            Debug.Log("热更完成！");
+            OnCompleted?.Invoke();
+        }
+        else
+        {
+            Debug.LogError("热更失败！");
+        }
+    }
+
+    IEnumerator TrackDownloadProgress(AsyncOperationHandle handle, long totalSize)
+    {
+        float lastTime = Time.realtimeSinceStartup;
+        float lastDownloaded = 0;
+
+        while (!handle.IsDone)
+        {
+            float percent = handle.PercentComplete;
+            OnProgressChanged?.Invoke(percent);
+
+            float currentTime = Time.realtimeSinceStartup;
+            float elapsed = currentTime - lastTime;
+
+            if (elapsed >= updateCheckInterval)
+            {
+                float currentDownloaded = percent * totalSize;
+                float speed = (currentDownloaded - lastDownloaded) / elapsed / 1024f; // KB/s
+
+                OnSpeedChanged?.Invoke(speed);
+
+                lastTime = currentTime;
+                lastDownloaded = currentDownloaded;
+            }
+
+            yield return null;
+        }
+
+        OnProgressChanged?.Invoke(1f);
+        OnSpeedChanged?.Invoke(0);
+    }
+}