1e41f4b71Sopenharmony_ci# UIServiceHostProxy (系统接口)
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3e41f4b71Sopenharmony_ciUIServiceHostProxy提供代理能力,可以将数据从[UIServiceExtension](js-apis-app-ability-uiServiceExtensionAbility-sys.md)服务端发送到客户端。
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6e41f4b71Sopenharmony_ci> **说明:**
7e41f4b71Sopenharmony_ci>
8e41f4b71Sopenharmony_ci>  - 本模块首批接口从API version 13开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。
9e41f4b71Sopenharmony_ci>  - 本模块接口仅可在Stage模型下使用。
10e41f4b71Sopenharmony_ci>  - 本模块接口需要在主线程中使用,不要在Worker、TaskPool等子线程中使用。
11e41f4b71Sopenharmony_ci>  - 本模块接口为系统接口。
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13e41f4b71Sopenharmony_ci## 导入模块
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15e41f4b71Sopenharmony_ci```ts
16e41f4b71Sopenharmony_ciimport { common } from '@kit.AbilityKit';
17e41f4b71Sopenharmony_ci```
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20e41f4b71Sopenharmony_ci## UIServiceHostProxy.sendData
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22e41f4b71Sopenharmony_cisendData(data: Record\<string, Object>): void
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24e41f4b71Sopenharmony_ci从[UIServiceExtension](js-apis-app-ability-uiServiceExtensionAbility-sys.md)服务端给客户端发送数据。
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27e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.Core
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29e41f4b71Sopenharmony_ci**系统接口**: 此接口为系统接口。
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31e41f4b71Sopenharmony_ci**参数:**
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33e41f4b71Sopenharmony_ci| 参数名 | 类型 | 只读 | 可选 | 说明 |
34e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- | -------- |
35e41f4b71Sopenharmony_ci| data | Record\<string, Object> | 是 | 否 | 待发送到[UIServiceExtension](js-apis-app-ability-uiServiceExtensionAbility-sys.md)客户端的数据。 |
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37e41f4b71Sopenharmony_ci**错误码:**
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39e41f4b71Sopenharmony_ci以下错误码详细介绍请参考[通用错误码](../errorcode-universal.md)和[元能力子系统错误码](errorcode-ability.md)。
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41e41f4b71Sopenharmony_ci| 错误码ID | 错误信息 |
42e41f4b71Sopenharmony_ci| ------- | -------------------------------- |
43e41f4b71Sopenharmony_ci| 202 | Not System App. Interface caller is not a system app .                                                       |
44e41f4b71Sopenharmony_ci| 401 | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified; 2. Incorrect parameter types; 3. Parameter verification failed. |
45e41f4b71Sopenharmony_ci| 16000050 | Internal error. |
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47e41f4b71Sopenharmony_ci**示例:**
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49e41f4b71Sopenharmony_ci```ts
50e41f4b71Sopenharmony_ciimport { common, UIServiceExtensionAbility } from '@kit.AbilityKit';
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52e41f4b71Sopenharmony_ciconst TAG: string = '[UiServiceExtensionAbility] ';
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54e41f4b71Sopenharmony_ciexport default class MyUiServiceExtensionAbility extends UIServiceExtensionAbility {
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56e41f4b71Sopenharmony_ci  // 数据发送处理
57e41f4b71Sopenharmony_ci  onData(proxy: common.UIServiceHostProxy, data: Record<string, Object>) {
58e41f4b71Sopenharmony_ci    console.log(TAG + `onData ${JSON.stringify(data)}`);
59e41f4b71Sopenharmony_ci    // 定义发送数据内容
60e41f4b71Sopenharmony_ci    let formData: Record<string, string> = {
61e41f4b71Sopenharmony_ci      'proxyData': 'proxyData'
62e41f4b71Sopenharmony_ci    };
63e41f4b71Sopenharmony_ci    try {
64e41f4b71Sopenharmony_ci      // 发送数据到UIServiceExtension的服务端
65e41f4b71Sopenharmony_ci      proxy.sendData(formData);
66e41f4b71Sopenharmony_ci    } catch (err) {
67e41f4b71Sopenharmony_ci      console.log(TAG + `sendData failed ${JSON.stringify(err.message)}`);
68e41f4b71Sopenharmony_ci    }
69e41f4b71Sopenharmony_ci  }
70e41f4b71Sopenharmony_ci}
71e41f4b71Sopenharmony_ci```
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