如何删除使用 phonegap-plugin-contentsync 下载的缓存文件?

How to delete cached files downloaded with phonegap-plugin-contentsync?

在我们使用 cordova 开发的应用程序中,我们需要删除借助 contentsync plugin 下载的文件。

这是我使用 file plugin 实现的。

function clearCache() {
    localStorage.clear();

    // remove the stuff from the file system as well
    deleteAllFilesInPath(cordova.file.dataDirectory);
    deleteAllFilesInPath(cordova.file.cacheDirectory);
    deleteAllFilesInPath(cordova.file.externalDataDirectory);
    deleteAllFilesInPath(cordova.file.externalCacheDirectory);
}

function deleteAllFilesInPath(path) {
    if (!path) { return; }
    window.resolveLocalFileSystemURL(path, function (entry) {
        if (entry.isDirectory) {
            var dirReader = entry.createReader();
            dirReader.readEntries(function(entries) {
                console.log(entries);
                for (var i in entries) {
                    deleteFileOrDirEntry(entries[i]);
                }
            })
        }
    })
}

function deleteLocalPath(path) {
    window.resolveLocalFileSystemURL(path,
        deleteFileOrDirEntry,
        function (error) {
            log.error("failed to access ", path, " error: ", JSON.stringify(error));
        });
}
function deleteFileOrDirEntry(entry) {
    if (entry.isDirectory) {
        entry.removeRecursively(function (code) {
                log.info("deleted dir ", entry.fullPath, " ", code);
            },
            function (error) {
                log.error("failed to remove dir ", entry.fullPath, " error: ", JSON.stringify(error))
            });
    } else {
        entry.remove(function (code) {
                log.info("deleted file ", entry.fullPath, " ", code);
            },
            function (error) {
                log.error("failed to remove file ", entry.fullPath, " error: ", JSON.stringify(error))
            });
    }
}

这在 Android 上运行良好。在 iOS,我遇到了一个问题,当我再次同步内容时,它失败并出现错误:

Task ... completed with error: The operation couldn't be completed. No such file or directory
Error downloading type: 2, responseCode: 200

但是当我退出应用程序并重新启动时,它可以正常工作。

我发现没有API可以直接在同步插件中删除文件。 我是否需要重置插件/通知它有关已删除文件的信息?

啊,似乎在 iOS 上,如果缓存目录也被清除,插件会感到困惑。如果我这样做:

function clearCache() {
    localStorage.clear();

    // remove the stuff from the file system as well
    deleteAllFilesInPath(cordova.file.dataDirectory);
    // deleteAllFilesInPath(cordova.file.cacheDirectory);
    deleteAllFilesInPath(cordova.file.externalDataDirectory);
    // deleteAllFilesInPath(cordova.file.externalCacheDirectory);
}

有效。

(问题仍然是这种删除文件的方式是否适用于同步插件,或者是否有/应该有一个 API。)