HarmonyOS鸿蒙Next中如何清除应用缓存

查询缓存用storageStatistics.getCurrentBundleStats()接口，清除文件缓存，需要调用context的cacheDir获取缓存，然后调用系统文件fs接口，判断是文件或者文件夹，再分别消除缓存。详细用法见下面的链接：

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import fs from '@ohos.file.fs';
let cacheDir = context.cacheDir;

@Entry
@Component
struct Clear_cache {
  clearCache() {
    fs.listFiles(cacheDir).then((filenames) => {
      for (let i = 0;i < filenames.length; i++) {
        let dirPath = `${cacheDir}/${filenames[i]}`

        let isDirectory
        try {
          isDirectory = fs.statSync(dirPath).isDirectory()
        }
        catch (e) {
          console.log(e)
        }

        if (isDirectory) {
          fs.rmdirSync(dirPath)
        } else {
          fs.unlink(dirPath).then(() => {
            console.info("remove file succeed");
          }).catch((err) => {
            console.info("remove file failed with error message: " + err.message + ", error code: " + err.code);
          });
        }
      }
    })
  }
}