HarmonyOS 鸿蒙Next怎样获取沙箱中图片的长和宽？

https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/photoaccesshelper-photoviewpicker-V5#%E6%8C%87%E5%AE%9Auri%E8%8E%B7%E5%8F%96%E5%9B%BE%E7%89%87%E6%88%96%E8%A7%86%E9%A2%91%E8%B5%84%E6%BA%90

https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-photoaccesshelper-V5#photokeys

import { dataSharePredicates } from '[@kit](/user/kit).ArkData';

const context = getContext(this);
let phAccessHelper = photoAccessHelper.getPhotoAccessHelper(context);

class MediaDataHandler implements photoAccessHelper.MediaAssetDataHandler<ArrayBuffer> {
  onDataPrepared(data: ArrayBuffer) {
    if (data === undefined) {
      console.error('Error occurred when preparing data');
      return;
    }
    console.info('on image data prepared');
    // 应用自定义对资源数据的处理逻辑
  }
}

async function example() {
  let predicates: dataSharePredicates.DataSharePredicates = new dataSharePredicates.DataSharePredicates();
  let uri = 'file://media/Photo/1/IMG_datetime_0001/displayName.jpg' // 需保证此uri已存在。
  predicates.equalTo(photoAccessHelper.PhotoKeys.URI, uri.toString());
  let fetchOptions: photoAccessHelper.FetchOptions = {
    fetchColumns: [photoAccessHelper.PhotoKeys.WIDTH, photoAccessHelper.PhotoKeys.HEIGHT],
    predicates: predicates
  };
  try {
    let fetchResult: photoAccessHelper.FetchResult<photoAccessHelper.PhotoAsset> =
      await phAccessHelper.getAssets(fetchOptions);
    let photoAsset: photoAccessHelper.PhotoAsset = await fetchResult.getFirstObject();
    console.info('getAssets photoAsset.uri : ' + photoAsset.uri);
    // 获取属性值，以标题为例；对于非默认查询的属性，get前需要在fetchColumns中添加对应列名
    console.info('title : ' + photoAsset.get(photoAccessHelper.PhotoKeys.WIDTH, photoAccessHelper.PhotoKeys.HEIGHT));
    // 请求图片资源数据
    let requestOptions: photoAccessHelper.RequestOptions = {
      deliveryMode: photoAccessHelper.DeliveryMode.HIGH_QUALITY_MODE,
    }
    await photoAccessHelper.MediaAssetManager.requestImageData(context, photoAsset, requestOptions,
      new MediaDataHandler());
    console.info('requestImageData successfully');
    fetchResult.close();
  } catch (err) {
    console.error('getAssets failed with err: ' + err);
  }
}

这个地方改为:

console.info('WIDTH : ' + photoAsset.get(photoAccessHelper.PhotoKeys.WIDTH));

console.info('HEIGHT : ' + photoAsset.get(photoAccessHelper.PhotoKeys.HEIGHT));

输出结果为图片的宽和高

您这边如果是这种路径的话，可以使用沙箱路径，先通过createImageSource构建一个ImageSource实例，再使用createPixelMap创建一个PixelMap对象来获取图片的宽高

参考以下文档:https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-sendableimage-V5#createpixelmap

let uri: sendableImage.ImageSource = sendableImage.createImageSource(图片沙箱路径);
uri.createPixelMap().then((pixelMap) => {
  pixelMap.getImageInfo().then(res => {
    console.log("awdawdaeq2e12312", JSON.stringify(res.size.width))
    console.log("awdawdaeq2e12312", JSON.stringify(res.size.height))
  })
})