修改ConfigManager，定义配置数据继承体系

assets/Scripts/chat18x/config/PurchaseConfig.ts

@@ -0,0 +1,50 @@
+/**
+ * 商城配置
+ */
+import { BaseConfig } from "./BaseConfig";
+import { ConfigManager } from "../manager/ConfigManager";
+
+export class PurchaseConfig extends BaseConfig {
+ 
+    public reset(): void {
+
+    }
+
+    public clear(): void {
+
+    }
+
+    public destroy(): void {
+        super.destroy();
+    }   
+    
+    /**
+     * 获取所有配置
+     */
+    protected getAllConfig(): any | null {
+        return ConfigManager.tables.TbPurchaseConfig;
+    }   
+
+    /**
+     * 获取配置，根据 id
+     */
+    protected getConfigById(id: number): any | null {
+        let allData = this.getAllConfig();
+        if (!allData) return null;
+        return allData.get(id);
+    }       
+    
+    /** 根据商品 id 获取商品名字 */
+    public getNameById(id: number): string | null {
+        let oneData = this.getConfigById(id);
+        if (!oneData) return null;
+        return oneData.name;
+    }
+
+    /** 根据商品 id 获取商品数量 */
+    public getCountById(id: number): number | null {
+        let oneData = this.getConfigById(id);
+        if (!oneData) return null;
+        return oneData.count;
+    }
+}