Qt 日志规范及原理分析

最新推荐文章于 2023-08-03 20:15:57 发布

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最新推荐文章于 2023-08-03 20:15:57 发布 · 1.1k 阅读

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Qt中debug和release状态下输出内容有所不同，debug模式下包含了数百条警告及错误日志，除非在编译期间设置了QT_NO_WARNING_OUTPUT和/或QT_NO_DEBUG_OUTPUT，否则在发布模式下构建的Qt也包含此类警告。

qt 格式化输出内容有两种方法： qInstallMessageHandler 和 qSetMessagePattern

qSetMessagePattern 使用方法

Placeholder	Description
%{appname}	QCoreApplication::applicationName()
%{category}	Logging category
%{file}	Path to source file
%{function}	Function
%{line}	Line in source file
%{message}	The actual message
%{pid}	QCoreApplication::applicationPid()
%{threadid}	The system-wide ID of current thread (if it can be obtained)
%{qthreadptr}	A pointer to the current QThread (result of QThread::currentThread())
%{type}	"debug", "warning", "critical" or "fatal"
%{time process}	time of the message, in seconds since the process started (the token "process" is literal)
%{time boot}	the time of the message, in seconds since the system boot if that can be determined (the token "boot" is literal). If the time since boot could not be obtai