diff --git a/assets/core/common/timer/TimerManager.ts b/assets/core/common/timer/TimerManager.ts
index 8db5771..9700bf3 100644
--- a/assets/core/common/timer/TimerManager.ts
+++ b/assets/core/common/timer/TimerManager.ts
@@ -8,10 +8,29 @@ import { Component, game } from "cc";
 import { StringUtil } from "../../utils/StringUtil";
 import { Timer } from "./Timer";
 
+interface ITimer {
+    /** 倒计时编号 */
+    id: string;
+    /** 定时器 */
+    timer: Timer;
+    /** 数据对象 */
+    object: any;
+    /** 修改数据对象的字段 */
+    field: string;
+    /** 事件侦听器的目标和被叫方 */
+    target: any;
+    /** 开始时间 */
+    startTime: number;
+    /** 每秒触发事件 */
+    onSeconds: Function[];
+    /** 时间完成事件 */
+    onCompletes: Function[];
+}
+
 /** 时间管理 */
 export class TimerManager extends Component {
     /** 倒计时数据 */
-    private times: any = {};
+    private times: { [key: string]: ITimer } = {};
     /** 服务器时间 */
     private date_s: Date = new Date();
     /** 服务器初始时间 */
@@ -25,7 +44,7 @@ export class TimerManager extends Component {
     protected update(dt: number) {
         for (let key in this.times) {
             let data = this.times[key];
-            let timer = data.timer as Timer;
+            let timer = data.timer;
             if (timer.update(dt)) {
                 if (data.object[data.field] > 0) {
                     data.object[data.field]--;
@@ -35,8 +54,8 @@ export class TimerManager extends Component {
                         this.onTimerComplete(data);
                     }
                     // 触发每秒回调事件  
-                    else if (data.onSecond) {
-                        data.onSecond.call(data.object);
+                    else if (data.onSeconds) {
+                        data.onSeconds.forEach(fn => fn.call(data.object));
                     }
                 }
             }
@@ -44,10 +63,8 @@ export class TimerManager extends Component {
     }
 
     /** 触发倒计时完成事件 */
-    private onTimerComplete(data: any) {
-        if (data.onComplete) data.onComplete.call(data.target, data.object);
-        if (data.event) this.node.dispatchEvent(data.event);
-
+    private onTimerComplete(data: ITimer) {
+        if (data.onCompletes) data.onCompletes.forEach(fn => fn.call(data.target, data.object));
         delete this.times[data.id];
     }
 
@@ -58,7 +75,7 @@ export class TimerManager extends Component {
      * @param target        触发事件的对象
      * @param onSecond      每秒事件
      * @param onComplete    倒计时完成事件
-     * @returns 
+     * @returns 倒计时编号
      * @example
     export class Test extends Component {
         private timeId!: string;
@@ -81,18 +98,37 @@ export class TimerManager extends Component {
         const timer = new Timer();
         timer.step = 1;
 
-        let data: any = {};
-        data.id = StringUtil.guid();
-        data.timer = timer;
-        data.object = object;                                   // 管理对象
-        data.field = field;                                     // 时间字段
-        data.onSecond = onSecond;                               // 每秒事件
-        data.onComplete = onComplete;                           // 倒计时完成事件
-        data.target = target
+        let data: ITimer = {
+            id: StringUtil.guid(),
+            timer: timer,
+            object: object,
+            field: field,
+            onSeconds: [],
+            onCompletes: [],
+            target: target,
+            startTime: this.getTime()
+        };
+        if (onSecond) data.onSeconds.push(onSecond);
+        if (onComplete) data.onCompletes.push(onComplete);
+
         this.times[data.id] = data;
         return data.id;
     }
 
+    /**
+     * 为指定倒计时添加回调事件
+     * @param id            倒计时编号
+     * @param onSecond      每秒事件
+     * @param onComplete    倒计时完成事件
+     */
+    addCallback(id: string, onSecond: Function, onComplete: Function) {
+        let data = this.times[id];
+        if (data) {
+            if (onSecond) data.onSeconds.push(onSecond);
+            if (onComplete) data.onCompletes.push(onComplete);
+        }
+    }
+
     /** 
      * 在指定对象上注销一个倒计时的回调管理器 
      * @param id         时间对象唯一表示
@@ -153,23 +189,24 @@ export class TimerManager extends Component {
     /** 游戏最小化时记录时间数据 */
     save(): void {
         for (let key in this.times) {
-            this.times[key].startTime = this.getTime();
+            let data: ITimer = this.times[key];
+            data.startTime = this.getTime();
         }
     }
 
     /** 游戏最大化时回复时间数据 */
     load(): void {
         for (let key in this.times) {
-            let interval = Math.floor((this.getTime() - (this.times[key].startTime || this.getTime())) / 1000);
             let data = this.times[key];
+            let interval = Math.floor((this.getTime() - (data.startTime || this.getTime())) / 1000);
             data.object[data.field] = data.object[data.field] - interval;
             if (data.object[data.field] <= 0) {
                 data.object[data.field] = 0;
                 this.onTimerComplete(data);
             }
             else {
-                this.times[key].startTime = null;
+                data.object[data.field] = 0;
             }
         }
     }
-} 
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/assets/libs/extension/DateExt.ts b/assets/libs/extension/DateExt.ts
index 46d72a2..36a44a5 100644
--- a/assets/libs/extension/DateExt.ts
+++ b/assets/libs/extension/DateExt.ts
@@ -1,10 +1,22 @@
 declare global {
     interface Date {
-        /** 时间格式化 */
+        /**
+         * 时间格式化
+         * @param format 时间格式，例如：yy-mm-dd hh:mm:ss
+         */
         format(format: string): string;
-        /** 时间加法 */
+
+        /**
+         * 时间加法
+         * @param addMillis 时间加法，单位毫秒
+         */
         addTime(addMillis: number): Date;
-        /** 验证时间是否在指定范围 */
+
+        /**
+         * 验证时间是否在指定范围
+         * @param t1 范围开始时间
+         * @param t2 范围结束时间
+         */
         range(t1: number | Date, t2: number | Date): boolean;
     }
 }
@@ -39,11 +51,11 @@ Date.prototype.format = function (format: string): string {
     return r;
 };
 
-Date.prototype.addTime = function (addMillis: number) {
+Date.prototype.addTime = function (addMillis: number): Date {
     return new Date(this.getTime() + addMillis);
 }
 
-Date.prototype.range = function (d1: number | Date, d2: number | Date) {
+Date.prototype.range = function (d1: number | Date, d2: number | Date): boolean {
     let t1: number = -1;
     let t2: number = -1;
     if (d1 instanceof Date)