Add files via upload

Author: jacksplwxy

src/Flyweight（享元）/Poll.ts

@@ -0,0 +1,31 @@
+//其他对象池参考：https://github.com/egret-labs/egret-game-library/blob/master/src/game/ObjectPool.ts
+
+class Pool {
+    static instance: Pool
+    // 单例模式
+    static getInstance() {
+        if (!Pool.instance) {
+            Pool.instance = new Pool()
+        }
+        return Pool.instance
+    }
+
+    public constructor() {
+
+    }
+
+    public getPoolBySign(name) {
+        return this[name] || (this[name] = [])
+    }
+
+    public getItemByClass(name, className) {
+        let pool = this.getPoolBySign(name)
+        let result = (pool.length ? pool.shift() : new className())
+        return result
+    }
+
+    public recover(name, instance) {
+        this.getPoolBySign(name).push(instance)
+    }
+}
+