制作一个承载想法的东西（九）—— 资源加载和管理

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在六章节讲热更的时候，使用了Addressable可寻址进行的热更，已经做好了一键标志地址，这里就说下怎么通过地址加载资源，然后在lua侧实现对象池回收，引用计数等。

一、lua脚本的加载

xlua中自定义的CustomLoader是同步进行加载的，所以我们需要在驱动lua逻辑之前就要进行预加载了，在第六章中标志地址的时候，如果是lua脚本内容会根据目录（模块）添加上一个lable，然后在上一章中，是通过一个配置文件列出了框架和公用的lua目录lable，然后进行预加载缓存起来。场景加载的时候会预加载加载相关场景的lua脚本。后面觉得新建非场景脚本目录（模块），每次都需要去配置文件中添加一下预加载，且脚本内容不是很大不占内存，所以改成lua脚本再创建lua虚拟机之前全部加载出来。只需要在标志地址的时候针对lua脚本添加一个统一的label，再根据这个lable统一去加载就好了。

启动时，在创建lua虚拟机之间，加载并缓存lua脚本，加载的时候就通过缓存通过返回结果。

public void ReBoot()
{
    AddressableManager.GetInstance().ClearLuaScriptCache();
    AddressableManager.GetInstance().PreLoadLuaScript("frametext", LoadFrameLuaComplete);
}

private void LoadFrameLuaComplete(object count)
{
    StartCoroutine(RestartLuaEnv());
}

public static byte[] CustomLoader(ref string filepath)
{
    StringBuilder scriptPath = new StringBuilder();
    scriptPath.Append(filepath.Replace(".", "/"));
    scriptPath.Append(".lua");

#if UNITY_EDITOR
    var scriptDir = Path.Combine(Application.dataPath, "..", "Src");
    var luaPath = Path.Combine(scriptDir, scriptPath.ToString());
    // Logger.Log("Load lua script : " + luaPath);
    return File.ReadAllBytes(luaPath);
#endif

    var txtAddress = scriptPath.Append(".bytes").ToString();
    var asset = AddressableManager.GetInstance().GetLuaScript(txtAddress);
    if (asset != null)
    {
        return asset;
    }
    return null;
}

//获取脚本 会在缓存中获取
public byte[] GetLuaScript(string key)
{
    byte[] datas = null;
    if (frameTextContents.ContainsKey(key))
        datas = frameTextContents[key].bytes;
    
    return datas;
}

public void ReBoot()

{

AddressableManager.GetInstance().ClearLuaScriptCache();

AddressableManager.GetInstance().PreLoadLuaScript("frametext", LoadFrameLuaComplete);

}

private void LoadFrameLuaComplete(object count)

{

StartCoroutine(RestartLuaEnv());

}

public static byte[] CustomLoader(ref string filepath)

{

StringBuilder scriptPath = new StringBuilder();

scriptPath.Append(filepath.Replace(".", "/"));

scriptPath.Append(".lua");

#if UNITY_EDITOR

var scriptDir = Path.Combine(Application.dataPath, "..", "Src");

var luaPath = Path.Combine(scriptDir, scriptPath.ToString());

// Logger.Log("Load lua script : " + luaPath);

return File.ReadAllBytes(luaPath);

#endif

var txtAddress = scriptPath.Append(".bytes").ToString();

var asset = AddressableManager.GetInstance().GetLuaScript(txtAddress);

if (asset != null)

{

return asset;

}

return null;

}

//获取脚本会在缓存中获取

public byte[] GetLuaScript(string key)

{

byte[] datas = null;

if (frameTextContents.ContainsKey(key))

datas = frameTextContents[key].bytes;

return datas;

}

通过label预加载lua脚本的接口，首先通过lable获取到所有的地址，再通过所有的地址获取所有的lua文本内容，我测试过了两个数组的地址是相对应的，缓存为地址key=>lua文本内容。

//预加载加载场景的所有Lua脚本资源
public async void PreLoadLuaScript(string label, Action<object> cb = null)
{
#if UNITY_EDITOR //编辑器下不需要预加载
    if (cb != null)
        cb(null);

    return;
#endif
    var op = Addressables.LoadResourceLocationsAsync(new List<string> { label }, Addressables.MergeMode.Union);
    var list = await op.Task;
    List<string> keys = new List<string>();
    foreach (var key in list)
    {
        keys.Add(key.PrimaryKey);
    }
    ReleaseByHandle(op);

    var op2 = Addressables.LoadAssetsAsync<TextAsset>(keys, null, Addressables.MergeMode.Union);
    var luaTextAssets = await op2.Task;

    if (list.Count != luaTextAssets.Count)
    {
        Debug.LogError("检查是否有重复key值的lua资源");
    }

    //缓存
    for (int i = 0; i < luaTextAssets.Count; i++)
    {
        if(!frameTextContents.ContainsKey(keys[i]))
            frameTextContents.Add(keys[i], luaTextAssets[i]);
    }

    if (cb != null)
        cb(keys.Count);
}

//预加载加载场景的所有Lua脚本资源

public async void PreLoadLuaScript(string label, Action<object> cb = null)

{

#if UNITY_EDITOR //编辑器下不需要预加载

if (cb != null)

cb(null);

return;

#endif

var op = Addressables.LoadResourceLocationsAsync(new List<string> { label }, Addressables.MergeMode.Union);

var list = await op.Task;

List<string> keys = new List<string>();

foreach (var key in list)

{

keys.Add(key.PrimaryKey);

}

ReleaseByHandle(op);

var op2 = Addressables.LoadAssetsAsync<TextAsset>(keys, null, Addressables.MergeMode.Union);

var luaTextAssets = await op2.Task;

if (list.Count != luaTextAssets.Count)

{

Debug.LogError("检查是否有重复key值的lua资源");

}

//缓存

for (int i = 0; i < luaTextAssets.Count; i++)

{

if(!frameTextContents.ContainsKey(keys[i]))

frameTextContents.Add(keys[i], luaTextAssets[i]);

}

if (cb != null)

cb(keys.Count);

}

二、其他资源的加载，场景、通用资源加载接口

这里加载场景的方式是叠加的方式，写死了，如果需要可以添加多一个参数进行控制。这里接口好像也没什么说的，OperationData是一个能提供给lua侧做携程等待的，并且加载完成后获取相应的资源。然后在lua侧实现一个AddressableManager.lua来调度这些接口，方便控制。

//加载场景
public OperationData LoadSceneAsync(string key)
{
    var aOperation = Addressables.LoadSceneAsync(key, LoadSceneMode.Additive, true);
    return OperationData.Get(aOperation,false);
}

//卸载场景
public OperationData UnLoadSceneAsync(SceneInstance scene)
{
    var aOperation = Addressables.UnloadSceneAsync(scene,false);
    return OperationData.Get(aOperation);
}

//加载单资源
public OperationData LoadObjectAsync(string key, bool autoRelease = false, Action<object> callback = null)
{
    var aOperation = Addressables.LoadAssetAsync<object>(key);
    return OperationData.Get(aOperation,autoRelease,callback);
}

//加载多个资源
public OperationData LoadObjectsAsync(List<string> keys, bool autoRelease = false, Action<object> callback = null)
{
    var aOperation = Addressables.LoadAssetsAsync<object>(keys, null, Addressables.MergeMode.Union);
    return OperationData.Get(aOperation,autoRelease,callback);
}

//卸载资源
public void ReleaseObject(UnityEngine.Object obj)
{
    Addressables.Release(obj);
}

//加载场景

public OperationData LoadSceneAsync(string key)

{

var aOperation = Addressables.LoadSceneAsync(key, LoadSceneMode.Additive, true);

return OperationData.Get(aOperation,false);

}

//卸载场景

public OperationData UnLoadSceneAsync(SceneInstance scene)

{

var aOperation = Addressables.UnloadSceneAsync(scene,false);

return OperationData.Get(aOperation);

}

//加载单资源

public OperationData LoadObjectAsync(string key, bool autoRelease = false, Action<object> callback = null)

{

var aOperation = Addressables.LoadAssetAsync<object>(key);

return OperationData.Get(aOperation,autoRelease,callback);

}

//加载多个资源

public OperationData LoadObjectsAsync(List<string> keys, bool autoRelease = false, Action<object> callback = null)

{

var aOperation = Addressables.LoadAssetsAsync<object>(keys, null, Addressables.MergeMode.Union);

return OperationData.Get(aOperation,autoRelease,callback);

}

//卸载资源

public void ReleaseObject(UnityEngine.Object obj)

{

Addressables.Release(obj);

}

lua侧的AddressManager.lua调用加载和释放接口：

local ManagerBase = require("Frame.Base.Manager.ManagerBase")
local AddressableManager = Class("Manager.AddressableManager",ManagerBase)
local CSAddressableManager = CS.Manager.AddressableManager

function AddressableManager:Init()
    if not self.csAddressableManager then
        self.csAddressableManager = CSAddressableManager.GetInstance()
    end
end

function AddressableManager:SetRemoteResCdnUrl( url )
    self.csAddressableManager:SetAddressableRemoteResCdnUrl( url )
end

---加载单一资源并缓存 --可获取进度GetOperation
---key为string
function AddressableManager:LoadObjectAsync(key)
    return self.csAddressableManager:LoadObjectAsync(key)
end

---加载多个资源并缓存 --可获取进度GetOperation
---keys为一个Table
function AddressableManager:LoadObjectsAsync(keys)
    return self.csAddressableManager:LoadObjectsAsync(keys)
end

---释放资源
---obj为加载的资源
function AddressableManager:ReleaseObject(obj)
    self.csAddressableManager:ReleaseObject(obj)
end

return AddressableManager

local ManagerBase = require("Frame.Base.Manager.ManagerBase")

local AddressableManager = Class("Manager.AddressableManager",ManagerBase)

local CSAddressableManager = CS.Manager.AddressableManager

function AddressableManager:Init()

if not self.csAddressableManager then

self.csAddressableManager = CSAddressableManager.GetInstance()

end

function AddressableManager:SetRemoteResCdnUrl( url )

self.csAddressableManager:SetAddressableRemoteResCdnUrl( url )

end

---加载单一资源并缓存 --可获取进度GetOperation

---key为string

function AddressableManager:LoadObjectAsync(key)

return self.csAddressableManager:LoadObjectAsync(key)

end

---加载多个资源并缓存 --可获取进度GetOperation

---keys为一个Table

function AddressableManager:LoadObjectsAsync(keys)

return self.csAddressableManager:LoadObjectsAsync(keys)

end

---释放资源

---obj为加载的资源

function AddressableManager:ReleaseObject(obj)

self.csAddressableManager:ReleaseObject(obj)

end

return AddressableManager

三、场景加载的例子

在章节二的时候，场景管理器使用的是Unity提供的UnityEngine.SceneManagement.SceneManager去加载场景的，目前使用了addressable后就采用addressable提供地址的形式来加载场景。这里直接贴一下最新的场景管理器的代码了，在LoadingScene方法中应用了卸载和加载场景。

--场景管理 加载
local base = require("Frame.Base.Manager.ManagerBase")
local M = Class("Manager.SceneManager",base)
local CSceneManager = CS.UnityEngine.SceneManagement.SceneManager

function M:Init()
    self.dont_release_keys = {}

    local scene = CSceneManager.GetSceneByName("Main")
    self.mainSceneScript = require("Frame.Scene.MainScene").New()
    self.mainSceneScript:__StartUp(scene)

    self.scene_config = nil
    self.currentSceneInstance = nil
    self.currentSceneName = nil
    self.currentSceneScirpt = nil
    self.loadAson = nil
    
    --框架预加载资源 内容不能多
    self:PreLoadFrameAsset()
end

function M:PreLoadFrameAsset()
    local need_preload_count = #FrameConfig.PreLoads
    if need_preload_count > 0 then
        local cur_preload_count = 0
        for i,v in ipairs(FrameConfig.PreLoads) do
            self.dont_release_keys[v] = true
            GameObjectManager:GetInstance():GetAsset(v, function()
                cur_preload_count = cur_preload_count + 1
                if cur_preload_count >= need_preload_count then
                    self:LoadScene(FrameConst.DefaultSceneName)
                    self.mainSceneScript:HideCanvasView()
                end
            end)
        end
    else
        self:LoadScene(FrameConst.DefaultSceneName)
        self.mainSceneScript:HideCanvasView()
    end
end

function M:LoadScene(sceneName)
    coroutine.start(function()
        self:LoadingScene(sceneName)
    end)
end

function M:LoadingScene(sceneName)
    if self.currentSceneScirpt ~= nil then
        --卸载原来场景
        UIManager:GetInstance():DestroyAllWindow() --清理所有的窗口 回收
        self.currentSceneScirpt:Dispose()
        GameObjectManager:GetInstance():ClearAllCache(self.dont_release_keys) --干掉
        AddressableManager:GetInstance():UnLoadSceneAsync(self.currentSceneInstance)
    end

    UIManager:GetInstance():OpenWindow(FrameConfig.UIWindowNames.UILoadingWindow)

    self.currentSceneName = sceneName

    local key = string.format("%s/Scene/%s.unity",sceneName,sceneName)
    self.loadAson = AddressableManager:GetInstance():LoadSceneAsync(key)
    coroutine.waitforasyncop(self.loadAson,function(co,progress)
        UIManager:GetInstance():Notify(FrameConfig.UIWindowNames.UILoadingWindow, "ShowProgress", progress)
    end)

    self:LoadSceneSuccess()
end

function M:LoadSceneSuccess()
    local path = string.format("%s.Configs.SceneConfig", self.currentSceneName)
	local isSuc, cls = pcall(require, path)
    if isSuc then
        self.scene_config = table.deep_copy(cls)
    else
        self.scene_config = {}
    end

    --预加载内容 进度的话 再考虑吧
    if self.scene_config.PreLoads and #self.scene_config.PreLoads > 0 then
        local need_preload_count = #self.scene_config.PreLoads
        local cur_preload_count = 0
        for i,v in ipairs(self.scene_config.PreLoads) do
            GameObjectManager:GetInstance():GetAsset(v, function()
                cur_preload_count = cur_preload_count + 1
                if cur_preload_count >= need_preload_count then
                    self:FinishLoadScene()
                end
            end)
        end
    else
        self:FinishLoadScene()
    end
end

function M:FinishLoadScene()
    --获取加载的场景
    self.currentSceneInstance = self.loadAson:GetAsset()
    local scene = self.currentSceneInstance.Scene
    CSceneManager.SetActiveScene(scene)

    self.loadAson = nil

    --防止场景逻辑直接就加载下一个场景 导致隐藏了下个场景的加载
    local tempSceneName = self.currentSceneName

    --加载场景脚本 --这里有可能在同一帧下加载下一个场景，所以放最后
    self.currentSceneScirpt = require(string.format("%s.%sScene",self.currentSceneName,self.currentSceneName )).New()
    self.currentSceneScirpt:__StartUp(scene)

    if tempSceneName == self.currentSceneName then
        UIManager:GetInstance():CloseWindow(FrameConfig.UIWindowNames.UILoadingWindow)
    end
end

function M:ShowMainCanvasView()
    if self.mainSceneScript then
        self.mainSceneScript:ShowCanvasView()
    end
end

function M:AddGameObjectToCurScene( obj )
    local scene = self:GetCurScene()
    if not scene then
        return
    end
    
    CSceneManager.MoveGameObjectToScene( obj, scene)
end

function M:GetCurentSceneScript()
    return self.currentSceneScirpt
end

function M:GetSceneName()
    return self.currentSceneName
end

function M:GetCurScene()
    if self.currentSceneInstance then
        return self.currentSceneInstance.Scene
    end

    return nil
end

function M:dtor()
    self.loadAson = nil
    self.unLoadAson = nil
    self.currentSceneInstance = nil
end

return M

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--场景管理加载

local base = require("Frame.Base.Manager.ManagerBase")

local M = Class("Manager.SceneManager",base)

local CSceneManager = CS.UnityEngine.SceneManagement.SceneManager

function M:Init()

self.dont_release_keys = {}

local scene = CSceneManager.GetSceneByName("Main")

self.mainSceneScript = require("Frame.Scene.MainScene").New()

self.mainSceneScript:__StartUp(scene)

self.scene_config = nil

self.currentSceneInstance = nil

self.currentSceneName = nil

self.currentSceneScirpt = nil

self.loadAson = nil

--框架预加载资源内容不能多

self:PreLoadFrameAsset()

end

function M:PreLoadFrameAsset()

local need_preload_count = #FrameConfig.PreLoads

if need_preload_count > 0 then

local cur_preload_count = 0

for i,v in ipairs(FrameConfig.PreLoads) do

self.dont_release_keys[v] = true

GameObjectManager:GetInstance():GetAsset(v, function()

cur_preload_count = cur_preload_count + 1

if cur_preload_count >= need_preload_count then

self:LoadScene(FrameConst.DefaultSceneName)

self.mainSceneScript:HideCanvasView()

end

end)

end

else

self:LoadScene(FrameConst.DefaultSceneName)

self.mainSceneScript:HideCanvasView()

end

function M:LoadScene(sceneName)

coroutine.start(function()

self:LoadingScene(sceneName)

end)

end

function M:LoadingScene(sceneName)

if self.currentSceneScirpt ~= nil then

--卸载原来场景

UIManager:GetInstance():DestroyAllWindow() --清理所有的窗口回收

self.currentSceneScirpt:Dispose()

GameObjectManager:GetInstance():ClearAllCache(self.dont_release_keys) --干掉

AddressableManager:GetInstance():UnLoadSceneAsync(self.currentSceneInstance)

end

UIManager:GetInstance():OpenWindow(FrameConfig.UIWindowNames.UILoadingWindow)

self.currentSceneName = sceneName

local key = string.format("%s/Scene/%s.unity",sceneName,sceneName)

self.loadAson = AddressableManager:GetInstance():LoadSceneAsync(key)

coroutine.waitforasyncop(self.loadAson,function(co,progress)

UIManager:GetInstance():Notify(FrameConfig.UIWindowNames.UILoadingWindow, "ShowProgress", progress)

end)

self:LoadSceneSuccess()

end

function M:LoadSceneSuccess()

local path = string.format("%s.Configs.SceneConfig", self.currentSceneName)

local isSuc, cls = pcall(require, path)

if isSuc then

self.scene_config = table.deep_copy(cls)

else

self.scene_config = {}

end

--预加载内容进度的话再考虑吧

if self.scene_config.PreLoads and #self.scene_config.PreLoads > 0 then

local need_preload_count = #self.scene_config.PreLoads

local cur_preload_count = 0

for i,v in ipairs(self.scene_config.PreLoads) do

GameObjectManager:GetInstance():GetAsset(v, function()

cur_preload_count = cur_preload_count + 1

if cur_preload_count >= need_preload_count then

self:FinishLoadScene()

end

end)

end

else

self:FinishLoadScene()

end

function M:FinishLoadScene()

--获取加载的场景

self.currentSceneInstance = self.loadAson:GetAsset()

local scene = self.currentSceneInstance.Scene

CSceneManager.SetActiveScene(scene)

self.loadAson = nil

--防止场景逻辑直接就加载下一个场景导致隐藏了下个场景的加载

local tempSceneName = self.currentSceneName

--加载场景脚本 --这里有可能在同一帧下加载下一个场景，所以放最后

self.currentSceneScirpt = require(string.format("%s.%sScene",self.currentSceneName,self.currentSceneName )).New()

self.currentSceneScirpt:__StartUp(scene)

if tempSceneName == self.currentSceneName then

UIManager:GetInstance():CloseWindow(FrameConfig.UIWindowNames.UILoadingWindow)

end

function M:ShowMainCanvasView()

if self.mainSceneScript then

self.mainSceneScript:ShowCanvasView()

end

function M:AddGameObjectToCurScene( obj )

local scene = self:GetCurScene()

if not scene then

return

end

CSceneManager.MoveGameObjectToScene( obj, scene)

end

function M:GetCurentSceneScript()

return self.currentSceneScirpt

end

function M:GetSceneName()

return self.currentSceneName

end

function M:GetCurScene()

if self.currentSceneInstance then

return self.currentSceneInstance.Scene

end

return nil

end

function M:dtor()

self.loadAson = nil

self.unLoadAson = nil

self.currentSceneInstance = nil

end

return M

四、资源加载对象池

需要实例化的资源例如Prefab，通过GetAssetInstance、CoGetAssetInstance来获取到实例，这里自动记录引用次数，不需要时可以通过RecycleObject进行回收或则通过ReleaseInstance销毁实例，回收的资源在下次加载的时候会优先使用不用再实例化（注意被污染的情况，删除了子物体或则添加了新物体，可以在Debug下添加回收检测，这里没做，注意使用就行），销毁的话会查看引用的次数，如果为0了就会卸载原始资源。

local ManagerBase = require("Frame.Base.Manager.ManagerBase")
local GameObjectManager = Class("Manager.GameObjectManager",ManagerBase)
local CSGameObject = CS.UnityEngine.GameObject

function GameObjectManager:ctor()
    self.assets = {}
    self.busykeys = {}
    self.instance_cache = {}
    self.instance_count = {}
    self.instance_key = {}

    self.cache_root = nil
    self:Init()
end

--初始化接收回收物体的地方
function GameObjectManager:Init()
    if not self.cache_root then
        local go = CSGameObject("InstanceCacheRoot")
        CSGameObject.DontDestroyOnLoad( go )
        self.cache_root = go.transform
    end
end

--回调的方式异步加载资源 需要实例化的资源通过GetAssetInstance加载
function GameObjectManager:GetAsset(key,cb)
    coroutine.start(function()
        local asset = self:CoGetAsset(key)
        cb(asset)
    end)
end

--异步加载资源
function GameObjectManager:CoGetAsset(key)
    if self:IsBusy(key) then
        coroutine.waituntil(function()
           return self:CheckCache(key)
        end)
    else
        if not self:CheckCache(key) then
            self.busykeys[key] = true
            local async = AddressableManager:GetInstance():LoadObjectAsync(key)
            coroutine.waitforasyncop(async)
            local asset = async:GetAsset()
            self:CacheAsset(key,asset)
            self.busykeys[key] = false
        end
    end

    return self.assets[key]
end

--回调的方式获取资源的实例
function GameObjectManager:GetAssetInstance(key,cb)
    coroutine.start(function()
        local instance = self:CoGetAssetInstance(key)
        cb(instance)
    end)
end

--异步获取资源的实例 记录资源的引用计数
function GameObjectManager:CoGetAssetInstance(key)
    if self.instance_cache[key] and #self.instance_cache[key] > 0 then
        local obj = table.remove(self.instance_cache[key], #self.instance_cache[key])
        return obj
    end

    local asset = nil
    if self:CheckCache(key) then
        asset = self.assets[key]
    end

    if asset == nil then
        asset = self:CoGetAsset(key)
    end

    if not IsNull(asset) and asset ~= nil then
        local instance = CS.UnityEngine.GameObject.Instantiate(asset)
        if not self.instance_count[key] then
            self.instance_count[key] = 0
        end
        self.instance_count[key] = self.instance_count[key] + 1
        self.instance_key[instance] = key
        return instance
    end

    zprint('CoGetAssetInstance ', key, " is nil")
    return nil
end

--实例化资源回收
function GameObjectManager:RecycleObject( obj )
    if IsNull(obj) then
        return
    end

    local key = self.instance_key[obj]
    if not key then
        return
    end

    self.instance_cache[key] = self.instance_cache[key] or {}
    obj.transform:SetParent(self.cache_root, false)
    obj:SetActive(false)
    table.insert(self.instance_cache[key], obj)
end

--释放实例化资源
function GameObjectManager:ReleaseInstance( obj )
    if IsNull(obj) then
        return
    end

    local key = self.instance_key[obj]
    if not key then
        return
    end

    self.instance_key[obj] = nil
    CSGameObject.Destroy(obj)
    self.instance_count[key] = self.instance_count[key] - 1
    if self.instance_count[key] <= 0 then
        self:ReleaseObject(key)
    end
end

--释放资源
function GameObjectManager:ReleaseObject( key )
    if self.instance_count[key] and self.instance_count[key] > 0 then
        zprint(string.format("%s instance count > 0", key))
        return
    end

    local asset = self.assets[key]
    if asset then
        AddressableManager:GetInstance():ReleaseObject(asset)
        self.assets[key] = nil
    end
end

--清除所有可以清理的缓存 场景切换调用
function GameObjectManager:ClearAllCache( donts )
    donts = donts or {}
    for k,v in pairs(self.instance_cache) do
        if not donts[k] then
            for i,vv in ipairs(v) do
                self:ReleaseInstance( vv )
            end

            self.instance_cache[k] = nil 
        end
    end

    for k,v in pairs(self.assets) do
        self:ReleaseObject(k)
    end
end

function GameObjectManager:CacheAsset(key,asset)
    self.assets[key] = asset
end

function GameObjectManager:CheckCache(key)
    if self.assets[key] then
        return true
    end

    return false
end

function GameObjectManager:IsBusy(key)
    if self.busykeys[key] then
        return true
    end

    return false
end

return GameObjectManager

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local ManagerBase = require("Frame.Base.Manager.ManagerBase")

local GameObjectManager = Class("Manager.GameObjectManager",ManagerBase)

local CSGameObject = CS.UnityEngine.GameObject

function GameObjectManager:ctor()

self.assets = {}

self.busykeys = {}

self.instance_cache = {}

self.instance_count = {}

self.instance_key = {}

self.cache_root = nil

self:Init()

end

--初始化接收回收物体的地方

function GameObjectManager:Init()

if not self.cache_root then

local go = CSGameObject("InstanceCacheRoot")

CSGameObject.DontDestroyOnLoad( go )

self.cache_root = go.transform

end

--回调的方式异步加载资源需要实例化的资源通过GetAssetInstance加载

function GameObjectManager:GetAsset(key,cb)

coroutine.start(function()

local asset = self:CoGetAsset(key)

cb(asset)

end)

end

--异步加载资源

function GameObjectManager:CoGetAsset(key)

if self:IsBusy(key) then

coroutine.waituntil(function()

return self:CheckCache(key)

end)

else

if not self:CheckCache(key) then

self.busykeys[key] = true

local async = AddressableManager:GetInstance():LoadObjectAsync(key)

coroutine.waitforasyncop(async)

local asset = async:GetAsset()

self:CacheAsset(key,asset)

self.busykeys[key] = false

end

return self.assets[key]

end

--回调的方式获取资源的实例

function GameObjectManager:GetAssetInstance(key,cb)

coroutine.start(function()

local instance = self:CoGetAssetInstance(key)

cb(instance)

end)

end

--异步获取资源的实例记录资源的引用计数

function GameObjectManager:CoGetAssetInstance(key)

if self.instance_cache[key] and #self.instance_cache[key] > 0 then

local obj = table.remove(self.instance_cache[key], #self.instance_cache[key])

return obj

end

local asset = nil

if self:CheckCache(key) then

asset = self.assets[key]

end

if asset == nil then

asset = self:CoGetAsset(key)

end

if not IsNull(asset) and asset ~= nil then

local instance = CS.UnityEngine.GameObject.Instantiate(asset)

if not self.instance_count[key] then

self.instance_count[key] = 0

end

self.instance_count[key] = self.instance_count[key] + 1

self.instance_key[instance] = key

return instance

end

zprint('CoGetAssetInstance ', key, " is nil")

return nil

end

--实例化资源回收

function GameObjectManager:RecycleObject( obj )

if IsNull(obj) then

return

end

local key = self.instance_key[obj]

if not key then

return

end

self.instance_cache[key] = self.instance_cache[key] or {}

obj.transform:SetParent(self.cache_root, false)

obj:SetActive(false)

table.insert(self.instance_cache[key], obj)

end

--释放实例化资源

function GameObjectManager:ReleaseInstance( obj )

if IsNull(obj) then

return

end

local key = self.instance_key[obj]

if not key then

return

end

self.instance_key[obj] = nil

CSGameObject.Destroy(obj)

self.instance_count[key] = self.instance_count[key] - 1

if self.instance_count[key] <= 0 then

self:ReleaseObject(key)

end

--释放资源

function GameObjectManager:ReleaseObject( key )

if self.instance_count[key] and self.instance_count[key] > 0 then

zprint(string.format("%s instance count > 0", key))

return

end

local asset = self.assets[key]

if asset then

AddressableManager:GetInstance():ReleaseObject(asset)

self.assets[key] = nil

end

--清除所有可以清理的缓存场景切换调用

function GameObjectManager:ClearAllCache( donts )

donts = donts or {}

for k,v in pairs(self.instance_cache) do

if not donts[k] then

for i,vv in ipairs(v) do

self:ReleaseInstance( vv )

end

self.instance_cache[k] = nil

end

for k,v in pairs(self.assets) do

self:ReleaseObject(k)

end

function GameObjectManager:CacheAsset(key,asset)

self.assets[key] = asset

end

function GameObjectManager:CheckCache(key)

if self.assets[key] then

return true

end

return false

end

function GameObjectManager:IsBusy(key)

if self.busykeys[key] then

return true

end

return false

end

return GameObjectManager

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