HarmonyOS 上传文件接口的回调数据怎么获得

参考示例代码：传入pixmap即可：

import { image } from '@kit.ImageKit';
import { common } from '@kit.AbilityKit';
import fs from '@ohos.file.fs';
import { BusinessError } from '@kit.BasicServicesKit';

let context = getContext(this) as common.UIAbilityContext;
const imagePackerApi = image.createImagePacker();
const path: string = context.cacheDir + "/pixel_map.jpg";
let packOpts: image.PackingOption = { format: "image/jpeg", quality: 98 };
let file = fs.openSync(path, fs.OpenMode.CREATE | fs.OpenMode.READ_WRITE);
imagePackerApi.packToFile(pixmap, file.fd, packOpts).then(() => {
  // 直接打包进文件
}).catch((error: BusinessError) => {
  console.error('Failed to pack the image. And the error is: ' + error);
})

文件是保存到沙箱目录的应用缓存文件路径下了。手机上的文件系统是看不到文件的。

https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/app-sandbox-directory-V5#应用沙箱路径和真实物理路径的对应关系