first commit

assets/scripts/ResourceManager.ts

@@ -0,0 +1,45 @@
+import { _decorator, Asset } from 'cc';
+const { ccclass } = _decorator;
+
+@ccclass('ResourceManager')
+export class ResourceManager {
+    private static _instance: ResourceManager;
+    private cache: Map<string, Asset> = new Map();
+
+    static get instance(): ResourceManager {
+        if (!this._instance) {
+            this._instance = new ResourceManager();
+        }
+        return this._instance;
+    }
+
+    /** 存资源 */
+    set(key: string, asset: Asset) {
+        this.cache.set(key, asset);
+    }
+
+    /** 取资源 */
+    get<T extends Asset>(key: string): T | undefined {
+        return this.cache.get(key) as T | undefined;
+    }
+
+    /** 是否存在 */
+    has(key: string): boolean {
+        return this.cache.has(key);
+    }
+
+    /** 释放某个资源 */
+    release(key: string) {
+        const asset = this.cache.get(key);
+        if (asset) {
+            asset.decRef(); // 减少引用计数
+            this.cache.delete(key);
+        }
+    }
+
+    /** 释放全部资源 */
+    releaseAll() {
+        this.cache.forEach(asset => asset.decRef());
+        this.cache.clear();
+    }
+}