async void OnClearLocalFile(object sender, RoutedEventArgs e)
{
if (await Kit.Confirm("清除缓存后再次用到时需要重新下载，建议存储空间充足时不必清除。\r\n确认要清除吗？"))
{
Kit.ClearCacheFiles();
Kit.Msg("清除完毕！");
}
}
void OnDelTemp(object sender, RoutedEventArgs e)
{
Kit.ClearCacheFiles();
}