update zh-cn/application-dev/reference/arkui-ts/ts-methods-timepicker-dialog.md.

Signed-off-by: Nluoying_ace <luoying19@huawei.com>

zh-cn/application-dev/reference/arkui-ts/ts-methods-timepicker-dialog.md

 # 时间滑动选择器弹窗
 
-默认以00：00至23：59的时间区间创建滑动选择器，展示在弹窗上。
+以24小时的时间区间创建时间滑动选择器，展示在弹窗上。
 
 >  **说明：**
+>
 > 该组件从API Version 8开始支持。后续版本如有新增内容，则采用上角标单独标记该内容的起始版本。
 
 ## TimePickerDialog.show
@@ -11,79 +12,64 @@ show(options?: TimePickerDialogOptions)
 
 定义时间滑动选择器弹窗并弹出。
 
-- options参数
+- TimePickerDialogOptions参数
+
   | 参数名 | 参数类型 | 必填 | 参数描述 |
   | -------- | -------- | -------- | -------- |
-  | selected | Date | 否 | 设置选中项的时间。<br/>默认值：当前系统时间 |
-  | useMilitaryTime | boolean | 否 | 展示时间是否为24小时制。<br/>默认值：false |
-  | onAccept | (value: [TimePickerResult](ts-basic-components-timepicker.md#TimePickerResult对象说明)) => void | 否 | 点击弹窗中确定按钮时触发。 |
-  | onCancel | () => void | 否 | 点击弹窗中取消按钮时触发。 |
-  | onChange | (value: [TimePickerResult](ts-basic-components-timepicker.md#TimePickerResult对象说明)) => void | 否 | 滑动选择器，当前选择项改变时触发。 |
+  | selected | Date | 否 | 设置当前选中的时间。<br/>默认值：当前系统时间 |
+  | useMilitaryTime | boolean | 否 | 展示时间是否为24小时制，默认为12小时制。<br/>默认值：false |
+  | onAccept | (value: [TimePickerResult](ts-basic-components-timepicker.md#TimePickerResult对象说明)) => void | 否 | 点击弹窗中的“确定”按钮时触发该回调。 |
+  | onCancel | () => void | 否 | 点击弹窗中的“取消”按钮时触发该回调。 |
+  | onChange | (value: [TimePickerResult](ts-basic-components-timepicker.md#TimePickerResult对象说明)) => void | 否 | 滑动弹窗中的选择器使当前选中时间改变时触发该回调。 |
 
 ## 示例
 
-### 时间滑动选择器（24小时制）示例
 ```ts
 // xxx.ets
 @Entry
 @Component
-struct TimePickerDialogExample01 {
-  @State isUseMilitaryTime: boolean = true;
-  private selectTime: Date = new Date('7/22/2022 12:45:00');
+struct TimePickerDialogExample {
+  private selectTime: Date = new Date('2020-12-25T08:30:00')
 
   build() {
-    Flex({direction: FlexDirection.Column, alignItems: ItemAlign.Center,
-      justifyContent: FlexAlign.Center }) {
-      Button("TimePickerDialog").onClick(() => {
-        TimePickerDialog.show({
-          selected:this.selectTime,  
-          useMilitaryTime: this.isUseMilitaryTime,
-          onAccept: (value: TimePickerResult) => {
-            console.info("TimePickerDialog:onAccept()" + JSON.stringify(value));
-          },
-          onCancel: () => {
-            console.info("TimePickerDialog:onCancel()");
-          },
-          onChange: (value: TimePickerResult) => {
-            console.info("TimePickerDialog:onChange()" + JSON.stringify(value));
-          }
+    Column() {
+      Button("TimePickerDialog 12小时制")
+        .margin(20)
+        .onClick(() => {
+          TimePickerDialog.show({
+            selected: this.selectTime,
+            onAccept: (value: TimePickerResult) => {
+              // 设置selectTime为按下确定按钮时的时间，这样当弹窗再次弹出时显示选中的为上一次确定的时间
+              this.selectTime.setHours(value.hour, value.minute)
+              console.info("TimePickerDialog:onAccept()" + JSON.stringify(value));
+            },
+            onCancel: () => {
+              console.info("TimePickerDialog:onCancel()");
+            },
+            onChange: (value: TimePickerResult) => {
+              console.info("TimePickerDialog:onChange()" + JSON.stringify(value));
+            }
+          })
         })
-      })
-    }
-  }
-}
-```
- ![zh-cn_image_0000001118642010](figures/zh-cn_image_0000001118642010.gif) 
-
-### 时间滑动选择器（12小时制）示例
-
-```ts
-// xxx.ets
-@Entry
-@Component
-struct TimePickerDialogExample02 {
-  @State isUseMilitaryTime: boolean = false;
-
-  build() {
-    Flex({direction: FlexDirection.Column, alignItems: ItemAlign.Center,
-      justifyContent: FlexAlign.Center }) {
-      Button("TimePickerDialog").onClick(() => {
-        TimePickerDialog.show({
-          useMilitaryTime: this.isUseMilitaryTime,
-          onAccept: (value: TimePickerResult) => {
-            console.info("TimePickerDialog:onAccept()" + JSON.stringify(value))
-          },
-          onCancel: () => {
-            console.info("TimePickerDialog:onCancel()");
-          },
-          onChange: (value: TimePickerResult) => {
-            console.info("TimePickerDialog:onChange()" + JSON.stringify(value));
-          }
+      Button("TimePickerDialog 24小时制")
+        .margin(20)
+        .onClick(() => {
+          TimePickerDialog.show({
+            selected: this.selectTime,
+            useMilitaryTime: true,
+            onAccept: (value: TimePickerResult) => {
+              this.selectTime.setHours(value.hour, value.minute)
+              console.info("TimePickerDialog:onAccept()" + JSON.stringify(value));
+            },
+            onCancel: () => {
+              console.info("TimePickerDialog:onCancel()");
+            },
+            onChange: (value: TimePickerResult) => {
+              console.info("TimePickerDialog:onChange()" + JSON.stringify(value));
+            }
+          })
         })
-      })
-    }
+    }.width('100%')
   }
 }
-```
-
- ![zh-cn_image_0000001118642020](figures/zh-cn_image_0000001118642020.gif) 
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+```
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