HarmonyOS 鸿蒙Next 真机无法将文件复制到缓存目录下输出临时文件地址

HarmonyOS 鸿蒙Next 真机无法将文件复制到缓存目录下输出临时文件地址
<markdown _ngcontent-wxk-c237="" class="markdownPreContainer">

  let photoPicker = new photoAccessHelper.PhotoViewPicker();
try {
const PhotoSelectResult = await photoPicker.select(PhotoSelectOptions);
const newImages: imageListStruct[] = [];
if (PhotoSelectResult.photoUris.length) {
for (let index = 0; index < PhotoSelectResult.photoUris.length; index++) {
let uri =
fileUri.getUriFromPath(PhotoSelectResult.photoUris[index]);
const trueUrl = getLastPartOfPath(PhotoSelectResult.photoUris[index])
//复制图片到缓存目录（缓存目录才有读写权限）
let filePath = await copyFileToCache(uri, context);
console.dir(filePath)
let newImage = new imageListStruct(imageUUid + index, PhotoSelectResult.photoUris[index],
trueUrl, filePath);
newImages.push(newImage);
  }
}
<span class="hljs-keyword"><span class="hljs-keyword">return</span></span> newImages;
} catch (error) {
console.error(‘选择图片时发生错误:’, error);
}
<button style="position: absolute; padding: 4px 8px 0px; cursor: pointer; top: 4px; right: 8px; font-size: 14px;">复制</button>

方法

export async function copyFileToCache(path: string, context: Context): Promise<string> {
  try {
<span class="hljs-keyword"><span class="hljs-keyword">let</span></span> file = fs.openSync(path, fs.OpenMode.READ_WRITE)
<span class="hljs-keyword"><span class="hljs-keyword">if</span></span> (file) {
  <span class="hljs-keyword"><span class="hljs-keyword">let</span></span> fileDir: <span class="hljs-keyword"><span class="hljs-keyword">string</span></span> = `${context.cacheDir}` <span class="hljs-comment"><span class="hljs-comment">//临时文件目录</span></span>
  <span class="hljs-comment"><span class="hljs-comment">//时间戳生成随机文件名</span></span>
  <span class="hljs-keyword"><span class="hljs-keyword">let</span></span> newPath: <span class="hljs-keyword"><span class="hljs-keyword">string</span></span> = `${<span class="hljs-keyword"><span class="hljs-keyword">new</span></span> Date().getTime()}_${path.split(<span class="hljs-string"><span class="hljs-string">"/"</span></span>)[path.split(<span class="hljs-string"><span class="hljs-string">"/"</span></span>).length-<span class="hljs-number"><span class="hljs-number">1</span></span>]}`
  <span class="hljs-keyword"><span class="hljs-keyword">let</span></span> targetPath: <span class="hljs-keyword"><span class="hljs-keyword">string</span></span> = `${fileDir}/${newPath}`
  fs.copyFileSync(file.fd, targetPath)
  <span class="hljs-keyword"><span class="hljs-keyword">return</span></span> newPath
} <span class="hljs-keyword"><span class="hljs-keyword">else</span></span> {
  <span class="hljs-keyword"><span class="hljs-keyword">return</span></span> <span class="hljs-string"><span class="hljs-string">''</span></span>
}
} catch (e) {
return Promise.resolve(’’)
}
}
<button style="position: absolute; padding: 4px 8px 0px; cursor: pointer; top: 4px; right: 8px; font-size: 14px;">复制</button>