Workaround to avoid SpriteAtlas missing when Use 'Use Existing Build' option in Editor

Unity Engine
,
1

Our project uses ‘Sprite Atlas V1 - Enabled For Builds’ option. If ‘Use Existing Build’ option was enabled, sometimes SpriteAtlases were missing. It seems this issue happens in not only one situation. But there is a situation that it happens reproducibly (Tested using Unity 2020.3.38 and Addressables 1.20.5):

  • Build Addressables
  • Restart Editor
  • Enter Play Mode with ‘Use Existing Build’ enabled
  • The spriteatlas will be missing and there will be a warning in the Console window: SpriteAtlasManager.atlasRequested wasn’t listened to while XXX requested. XXX is the name of the spriteatlas

I submitted a bug report for this issue: IN-15497.

Altough it seems that it’s an issue in the engine side, but there is a simple workaround for Addressables to avoid it:

 .../Editor/Build/DataBuilders/BuildScriptPackedPlayMode.cs             | 3 +++
1 file changed, 3 insertions(+)

diff --git a/Packages/com.unity.addressables/Editor/Build/DataBuilders/BuildScriptPackedPlayMode.cs b/Packages/com.unity.addressables/Editor/Build/DataBuilders/BuildScriptPackedPlayMode.cs
index 8405227..4a55f2a 100644
--- a/Packages/com.unity.addressables/Editor/Build/DataBuilders/BuildScriptPackedPlayMode.cs
+++ b/Packages/com.unity.addressables/Editor/Build/DataBuilders/BuildScriptPackedPlayMode.cs
@@ -82,6 +82,9 @@ namespace UnityEditor.AddressableAssets.Build.DataBuilders
             if (buildLogs.RuntimeBuildLogs.Count > 0)
                 File.WriteAllText(buildLogsPath, JsonUtility.ToJson(buildLogs));
+            if (EditorSettings.spritePackerMode == SpritePackerMode.BuildTimeOnlyAtlas)
+                UnityEditor.U2D.SpriteAtlasUtility.PackAllAtlases(EditorUserBuildSettings.activeBuildTarget);
+
             //TODO: detect if the data that does exist is out of date..
             var runtimeSettingsPath = "{UnityEngine.AddressableAssets.Addressables.RuntimePath}/settings.json";
             PlayerPrefs.SetString(Addressables.kAddressablesRuntimeDataPath, runtimeSettingsPath);

Hope it can help someone.

2

Unity QA found it has been fixed in Unity 2022.2.0a16 and created a link for tracking this issue: Unity Issue Tracker - Sprite Atlas is missing in runtime after reopening the project when using AssetBundles