How to add customized suffix append to daily file? Like "20210905.mylog"

[WorstCodeWay]

The tile describes my demand. Thanks

[tt4g]

You can use spdlog::sinks::daily_file_format_sink_mt.
e.g. std::shared_ptr<spdlog::logger> logger = spdlog::daily_logger_format_mt("daily_logger", "%Y%m%d.mylog");
See this PR #1847.

[WorstCodeWay]

You can use spdlog::sinks::daily_file_format_sink_mt.

Thanks，I believe this can solve my title question, but can I further add sinks(say, qtwidget sink) into this "format daily logger")?

[tt4g]

spdlog::sinks::dist_sink_mt can combine multiple sinks into a single sink.

auto dist_sink = std::make_shared<spdlog::sinks::dist_sink_mt>();

dist_sink->add_sink(
    std::make_shared<spdlog::sinks::daily_file_format_sink_mt>(
        "%Y%m%d.mylog", ...(other args) ));

// Add other sinks.
dist_sink->add_sink( ... );

auto dist_logger = std::make_shared<spdlog::logger>("dist_logger", dist_sink);
spdlog::register_logger(dist_logger);

[WorstCodeWay]

spdlog::sinks::dist_sink_mt can combine multiple sinks into a single sink.

auto dist_sink = std::make_shared<spdlog::sinks::dist_sink_mt>();

dist_sink->add_sink(
    std::make_shared<spdlog::sinks::daily_file_format_sink_mt>(
        "%Y%m%d.mylog", ...(other args) ));

// Add other sinks.
dist_sink->add_sink( ... );

auto dist_logger = std::make_shared<spdlog::logger>("dist_logger", dist_sink);
spdlog::register_logger(dist_logger);

Nice！I will try it.

[WorstCodeWay]

spdlog::sinks::dist_sink_mt can combine multiple sinks into a single sink.

auto dist_sink = std::make_shared<spdlog::sinks::dist_sink_mt>();

dist_sink->add_sink(
    std::make_shared<spdlog::sinks::daily_file_format_sink_mt>(
        "%Y%m%d.mylog", ...(other args) ));

// Add other sinks.
dist_sink->add_sink( ... );

auto dist_logger = std::make_shared<spdlog::logger>("dist_logger", dist_sink);
spdlog::register_logger(dist_logger);

I have tried, and just daily_file_format_sink_mt satisfies my demand: add a daily file sink with custom suffix append onto log file, like ".mylog", and add this sink into logger which will add further sinks, so codes is:

auto formatfilesink = std::make_shared<spdlog::sinks::daily_file_format_sink_mt>("Log_%Y-%m-%d.log", 23, 59);
auto logger = std::make_shared<spdlog::logger>("LogName",  _sysFileSink);

logger->sinks().push_back(/*some other sink*/);

That works just fine.

Thank you again, @tt4g.