设置KIA文件水印图片

场景介绍

为应用提供设置KIA文件水印图片能力。

接口说明

详细接口说明可参考接口文档。

接口名	描述
setKiaWatermarkImage(image: Uint8Array, info: string): Promise<void>	使用Promise方式设置KIA文件水印图片。

开发步骤

1. 导入模块。

   import { fileGuard } from '@kit.EnterpriseDataGuardKit';
   import { fileIo } from '@kit.CoreFileKit';
   import { BusinessError } from '@kit.BasicServicesKit';

2. 初始化FileGuard对象guard，调用接口setKiaWatermarkImage，设置KIA文件水印图片。

   async function testSetKiaWaterMarkImage() {
     try {
       let guard: fileGuard.FileGuard = new fileGuard.FileGuard();
       let imagePath: string = '/data/service/el2/{account_id}/hmdfs/account/files/Docs/Documents/1.png';
       let fd: number = await guard.openFile(imagePath);
       let stat: fileIo.Stat = fileIo.statSync(fd);
       let buffer: ArrayBuffer = new ArrayBuffer(stat.size);
       fileIo.readSync(fd, buffer);
   
       let image: Uint8Array = new Uint8Array(buffer);
       let info: string = new Date().toLocaleString();
       guard.setKiaWatermarkImage(image, info).then(() => {
         console.info(`Succeeded in setting the watermark image for Kia file.`);
       }).catch((err: BusinessError) => {
         console.error(`Failed to set the watermark image for Kia file. Code: ${err.code}, message: ${err.message}.`);
       })
     } catch (e) {
       console.error(`[scanFileGuard] testSetKiaWaterMarkImage Exception, Code: ${e.code}, message: ${e.message}`);
     }
   }