{"id":48,"date":"2024-08-20T10:45:47","date_gmt":"2024-08-20T02:45:47","guid":{"rendered":"https:\/\/cnsn.rr.nu\/?p=48"},"modified":"2024-08-20T10:45:47","modified_gmt":"2024-08-20T02:45:47","slug":"qt%e4%b8%ad%e6%97%a5%e5%bf%97%e7%b3%bb%e7%bb%9f%e9%80%89%e6%8b%a9","status":"publish","type":"post","link":"https:\/\/blog.cnsn.fun\/?p=48","title":{"rendered":"qt\u4e2d\u65e5\u5fd7\u7cfb\u7edf\u9009\u62e9"},"content":{"rendered":"

\u5728Qt\u4e2d\u5b9e\u73b0\u4e00\u4e2a\u7b26\u5408\u4f60\u9700\u6c42\u7684\u65e5\u5fd7\u7cfb\u7edf\uff0c\u53ef\u4ee5\u8003\u8651\u4ee5\u4e0b\u51e0\u79cd\u65b9\u6848\uff0c\u8fd9\u4e9b\u65b9\u6848\u80fd\u591f\u6ee1\u8db3\u683c\u5f0f\u5316\u65e5\u5fd7\u8f93\u51fa\u3001\u65e5\u5fd7\u7b49\u7ea7\u7ba1\u7406\uff0c\u4ee5\u53ca\u5728\u542f\u7528\u8c03\u8bd5\u9009\u9879\u65f6\u5305\u542b\u6587\u4ef6\u3001\u51fd\u6570\u548c\u884c\u6570\u7b49\u4fe1\u606f\u7684\u8981\u6c42\u3002<\/p>\n

1. Qt \u5185\u7f6e\u65e5\u5fd7\u529f\u80fd (qDebug<\/code>, qWarning<\/code>, qCritical<\/code>, qFatal<\/code>)<\/strong><\/h3>\n

Qt \u81ea\u5e26\u4e86\u4e00\u5957\u65e5\u5fd7\u529f\u80fd\uff0c\u4e3b\u8981\u5305\u62ec qDebug<\/code>, qWarning<\/code>, qCritical<\/code>, \u548c qFatal<\/code> \u8fd9\u51e0\u4e2a\u5b8f\u3002\u867d\u7136\u9ed8\u8ba4\u7684\u8f93\u51fa\u683c\u5f0f\u76f8\u5bf9\u7b80\u5355\uff0c\u4f46\u4f60\u53ef\u4ee5\u901a\u8fc7\u91cd\u5b9a\u5411\u65e5\u5fd7\u8f93\u51fa\u6d41\uff0c\u6765\u81ea\u5b9a\u4e49\u65e5\u5fd7\u683c\u5f0f\u548c\u5185\u5bb9\u3002<\/p>\n

\u793a\u4f8b\u4ee3\u7801\uff1a<\/h4>\n
#include <QDebug>\n#include <QDateTime>\n#include <QFile>\n#include <QTextStream>\n\nvoid customLogOutput(QtMsgType type, const QMessageLogContext &context, const QString &msg) {\n    QString logLevel;\n    switch (type) {\n    case QtDebugMsg:\n        logLevel = "DEBUG";\n        break;\n    case QtWarningMsg:\n        logLevel = "WARNING";\n        break;\n    case QtCriticalMsg:\n        logLevel = "CRITICAL";\n        break;\n    case QtFatalMsg:\n        logLevel = "FATAL";\n        break;\n    }\n\n    QString logMessage = QString("%1 [%2] (%3:%4, %5): %6")\n        .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"))\n        .arg(logLevel)\n        .arg(context.file)\n        .arg(context.line)\n        .arg(context.function)\n        .arg(msg);\n\n    QFile outFile("app.log");\n    if (outFile.open(QIODevice::WriteOnly | QIODevice::Append)) {\n        QTextStream ts(&outFile);\n        ts << logMessage << endl;\n    }\n\n    \/\/ \u4e5f\u53ef\u4ee5\u5c06\u65e5\u5fd7\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u6216\u5176\u4ed6\u5730\u65b9\n    QTextStream(stdout) << logMessage << endl;\n}\n\nint main(int argc, char *argv[]) {\n    QCoreApplication a(argc, argv);\n\n    qInstallMessageHandler(customLogOutput);\n\n    qDebug() << "This is a debug message";\n    qWarning() << "This is a warning message";\n    qCritical() << "This is a critical message";\n    \/\/ qFatal() << "This is a fatal error message";\n\n    return a.exec();\n}<\/code><\/pre>\n
\u89e3\u91ca\uff1a<\/h4>\n
    \n
  • \u91cd\u5b9a\u5411\u65e5\u5fd7\u8f93\u51fa<\/strong>\uff1a\u901a\u8fc7 qInstallMessageHandler<\/code> \u53ef\u4ee5\u91cd\u5b9a\u5411 Qt \u65e5\u5fd7\u8f93\u51fa\uff0c\u5c06\u65e5\u5fd7\u4fe1\u606f\u91cd\u5b9a\u5411\u5230\u81ea\u5b9a\u4e49\u7684\u5904\u7406\u51fd\u6570 customLogOutput<\/code>\u3002<\/li>\n
  • \u683c\u5f0f\u5316\u65e5\u5fd7<\/strong>\uff1a\u5728\u81ea\u5b9a\u4e49\u7684\u5904\u7406\u51fd\u6570\u4e2d\uff0c\u4f60\u53ef\u4ee5\u6839\u636e\u9700\u6c42\u683c\u5f0f\u5316\u65e5\u5fd7\u5185\u5bb9\uff0c\u5305\u542b\u65f6\u95f4\u3001\u65e5\u5fd7\u7b49\u7ea7\u3001\u6587\u4ef6\u3001\u884c\u6570\u3001\u51fd\u6570\u7b49\u4fe1\u606f\u3002<\/li>\n
  • \u65e5\u5fd7\u8f93\u51fa<\/strong>\uff1a\u53ef\u4ee5\u5c06\u65e5\u5fd7\u8f93\u51fa\u5230\u6587\u4ef6\u3001\u63a7\u5236\u53f0\u6216\u5176\u4ed6\u76ee\u6807\uff0c\u6ee1\u8db3\u4f60\u7684\u9700\u6c42\u3002<\/li>\n<\/ul>\n
    \u4f18\u70b9\uff1a<\/h4>\n
      \n
    • \u8f7b\u91cf\u7ea7<\/strong>\uff1a\u4f7f\u7528 Qt \u81ea\u5e26\u7684\u65e5\u5fd7\u7cfb\u7edf\uff0c\u65e0\u9700\u5f15\u5165\u989d\u5916\u7684\u5e93\u6216\u6a21\u5757\u3002<\/li>\n
    • \u6613\u4e8e\u6269\u5c55<\/strong>\uff1a\u901a\u8fc7\u81ea\u5b9a\u4e49\u65e5\u5fd7\u5904\u7406\u51fd\u6570\uff0c\u53ef\u4ee5\u7075\u6d3b\u5730\u63a7\u5236\u65e5\u5fd7\u8f93\u51fa\u683c\u5f0f\u548c\u5185\u5bb9\u3002<\/li>\n
    • \u53ef\u63a7<\/strong>\uff1a\u53ef\u4ee5\u6839\u636e\u9700\u6c42\u5728\u8fd0\u884c\u65f6\u542f\u7528\u6216\u7981\u7528\u4e0d\u540c\u7ea7\u522b\u7684\u65e5\u5fd7\u8f93\u51fa\u3002<\/li>\n<\/ul>\n
      \u7f3a\u70b9\uff1a<\/h4>\n
        \n
      • \u529f\u80fd\u8f83\u57fa\u7840<\/strong>\uff1a\u9700\u8981\u81ea\u5df1\u5b9e\u73b0\u66f4\u591a\u9ad8\u7ea7\u529f\u80fd\uff0c\u5982\u65e5\u5fd7\u8f6e\u8f6c\u3001\u5f02\u6b65\u5199\u5165\u7b49\u3002<\/li>\n<\/ul>\n
        2. \u57fa\u4e8e QLoggingCategory<\/code> \u7684\u65e5\u5fd7\u7cfb\u7edf<\/strong><\/h3>\n
        QLoggingCategory<\/code> \u662f Qt 5 \u5f15\u5165\u7684\u4e00\u4e2a\u66f4\u9ad8\u7ea7\u7684\u65e5\u5fd7\u5206\u7c7b\u548c\u7ba1\u7406\u5de5\u5177\u3002\u5b83\u5141\u8bb8\u4f60\u5bf9\u65e5\u5fd7\u8fdb\u884c\u5206\u7c7b\uff0c\u5e76\u4e14\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u63a7\u5236\u54ea\u4e9b\u7c7b\u522b\u7684\u65e5\u5fd7\u542f\u7528\u6216\u7981\u7528\u3002<\/p>\n
        \u793a\u4f8b\u4ee3\u7801\uff1a<\/h4>\n
        #include <QLoggingCategory>\n\nQ_LOGGING_CATEGORY(logDebug, "myApp.debug")\nQ_LOGGING_CATEGORY(logWarning, "myApp.warning")\n\nvoid logExample() {\n    qCDebug(logDebug) << "This is a debug message";\n    qCWarning(logWarning) << "This is a warning message";\n}<\/code><\/pre>\n
        \u89e3\u91ca\uff1a<\/h4>\n
          \n
        • \u65e5\u5fd7\u5206\u7c7b<\/strong>\uff1a\u901a\u8fc7 QLoggingCategory<\/code> \u521b\u5efa\u4e0d\u540c\u7684\u65e5\u5fd7\u5206\u7c7b\uff0c\u5e76\u5728\u4ee3\u7801\u4e2d\u4f7f\u7528 qCDebug<\/code>, qCWarning<\/code> \u7b49\u5b8f\u6765\u8f93\u51fa\u65e5\u5fd7\u3002<\/li>\n
        • \u63a7\u5236\u65e5\u5fd7\u7ea7\u522b<\/strong>\uff1a\u4f60\u53ef\u4ee5\u5728\u7a0b\u5e8f\u4e2d\u6216\u901a\u8fc7\u914d\u7f6e\u6587\u4ef6\u52a8\u6001\u542f\u7528\u6216\u7981\u7528\u7279\u5b9a\u5206\u7c7b\u7684\u65e5\u5fd7\u8f93\u51fa\uff0c\u7075\u6d3b\u63a7\u5236\u65e5\u5fd7\u7ea7\u522b\u3002<\/li>\n<\/ul>\n
          \u4f18\u70b9\uff1a<\/h4>\n
            \n
          • \u5206\u7c7b\u7ba1\u7406<\/strong>\uff1a\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u7684\u6a21\u5757\u6216\u529f\u80fd\u5b9a\u4e49\u65e5\u5fd7\u5206\u7c7b\uff0c\u589e\u5f3a\u65e5\u5fd7\u7684\u53ef\u7ba1\u7406\u6027\u3002<\/li>\n
          • \u8fd0\u884c\u65f6\u63a7\u5236<\/strong>\uff1a\u53ef\u4ee5\u5728\u4e0d\u4fee\u6539\u4ee3\u7801\u7684\u60c5\u51b5\u4e0b\uff0c\u901a\u8fc7\u914d\u7f6e\u6587\u4ef6\u52a8\u6001\u63a7\u5236\u65e5\u5fd7\u8f93\u51fa\u3002<\/li>\n<\/ul>\n
            \u7f3a\u70b9\uff1a<\/h4>\n
              \n
            • \u590d\u6742\u5ea6\u7565\u9ad8<\/strong>\uff1a\u76f8\u6bd4\u57fa\u7840\u7684 qDebug<\/code> \u7cfb\u5217\u5b8f\uff0cQLoggingCategory<\/code> \u7684\u4f7f\u7528\u7a0d\u663e\u590d\u6742\uff0c\u9700\u8981\u5b9a\u4e49\u548c\u7ba1\u7406\u591a\u4e2a\u5206\u7c7b\u3002<\/li>\n<\/ul>\n
              3. \u4f7f\u7528\u7b2c\u4e09\u65b9\u65e5\u5fd7\u5e93\uff1aspdlog<\/code><\/strong><\/h3>\n
              \u5982\u679c\u4f60\u9700\u8981\u4e00\u4e2a\u529f\u80fd\u66f4\u5f3a\u5927\u3001\u6027\u80fd\u66f4\u9ad8\u7684\u65e5\u5fd7\u7cfb\u7edf\uff0c\u7b2c\u4e09\u65b9\u65e5\u5fd7\u5e93\u5982 spdlog<\/code> \u662f\u4e00\u4e2a\u5f88\u597d\u7684\u9009\u62e9\u3002spdlog<\/code> \u652f\u6301\u5f02\u6b65\u65e5\u5fd7\u8bb0\u5f55\u3001\u9ad8\u6027\u80fd\u3001\u65e5\u5fd7\u8f6e\u8f6c\u3001\u591a\u79cd\u8f93\u51fa\u76ee\u6807\u7b49\u7279\u6027\u3002<\/p>\n
              \u793a\u4f8b\u4ee3\u7801\uff1a<\/h4>\n
              #include "spdlog\/spdlog.h"\n#include "spdlog\/sinks\/basic_file_sink.h"\n\nvoid setupLogger() {\n    auto logger = spdlog::basic_logger_mt("file_logger", "logs\/app.log");\n    spdlog::set_default_logger(logger);\n    spdlog::set_pattern("%Y-%m-%d %H:%M:%S [%l] %v (%@)");\n\n    spdlog::info("Logger initialized");\n}\n\nint main() {\n    setupLogger();\n\n    spdlog::debug("This is a debug message");\n    spdlog::warn("This is a warning message");\n    spdlog::error("This is an error message");\n\n    return 0;\n}<\/code><\/pre>\n
              \u89e3\u91ca\uff1a<\/h4>\n
                \n
              • \u65e5\u5fd7\u683c\u5f0f<\/strong>\uff1a\u901a\u8fc7 set_pattern<\/code> \u53ef\u4ee5\u5b9a\u4e49\u65e5\u5fd7\u7684\u8f93\u51fa\u683c\u5f0f\uff0c\u5305\u62ec\u65f6\u95f4\u3001\u65e5\u5fd7\u7ea7\u522b\u3001\u6587\u4ef6\u3001\u884c\u6570\u7b49\u3002<\/li>\n
              • \u65e5\u5fd7\u7b49\u7ea7<\/strong>\uff1aspdlog<\/code> \u652f\u6301\u591a\u79cd\u65e5\u5fd7\u7b49\u7ea7\uff08\u5982 debug<\/code>, info<\/code>, warn<\/code>, error<\/code>\uff09\uff0c\u5e76\u4e14\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u7075\u6d3b\u63a7\u5236\u65e5\u5fd7\u8f93\u51fa\u7ea7\u522b\u3002<\/li>\n
              • \u5f02\u6b65\u65e5\u5fd7<\/strong>\uff1a\u5bf9\u4e8e\u6027\u80fd\u654f\u611f\u7684\u5e94\u7528\uff0cspdlog<\/code> \u63d0\u4f9b\u4e86\u5f02\u6b65\u65e5\u5fd7\u6a21\u5f0f\uff0c\u53ef\u4ee5\u5728\u4e0d\u5f71\u54cd\u4e3b\u7ebf\u7a0b\u7684\u60c5\u51b5\u4e0b\u9ad8\u6548\u5730\u8bb0\u5f55\u65e5\u5fd7\u3002<\/li>\n<\/ul>\n
                \u4f18\u70b9\uff1a<\/h4>\n
                  \n
                • \u9ad8\u6027\u80fd<\/strong>\uff1aspdlog<\/code> \u662f\u4e00\u4e2a\u9ad8\u6027\u80fd\u7684\u65e5\u5fd7\u5e93\uff0c\u9002\u5408\u9700\u8981\u9ad8\u6548\u5904\u7406\u65e5\u5fd7\u7684\u5927\u578b\u5e94\u7528\u3002<\/li>\n
                • \u4e30\u5bcc\u529f\u80fd<\/strong>\uff1a\u652f\u6301\u65e5\u5fd7\u8f6e\u8f6c\u3001\u5f02\u6b65\u65e5\u5fd7\u3001\u591a\u7ebf\u7a0b\u5b89\u5168\u7b49\u529f\u80fd\uff0c\u6269\u5c55\u6027\u5f3a\u3002<\/li>\n<\/ul>\n
                  \u7f3a\u70b9\uff1a<\/h4>\n
                    \n
                  • \u5916\u90e8\u4f9d\u8d56<\/strong>\uff1a\u9700\u8981\u5f15\u5165\u7b2c\u4e09\u65b9\u5e93\uff0c\u589e\u52a0\u4e86\u9879\u76ee\u7684\u590d\u6742\u5ea6\u3002<\/li>\n
                  • \u914d\u7f6e\u7a0d\u590d\u6742<\/strong>\uff1a\u76f8\u5bf9\u4e8e Qt \u5185\u7f6e\u7684\u65e5\u5fd7\u7cfb\u7edf\uff0cspdlog<\/code> \u9700\u8981\u66f4\u591a\u7684\u914d\u7f6e\u548c\u5b66\u4e60\u6210\u672c\u3002<\/li>\n<\/ul>\n
                    \u63a8\u8350\u65b9\u6848<\/strong><\/h3>\n
                    \u5982\u679c\u4f60\u9700\u8981\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u4e14\u6613\u4e8e\u96c6\u6210\u7684\u65e5\u5fd7\u7cfb\u7edf\uff0c\u5e76\u4e14\u5e0c\u671b\u5229\u7528Qt\u73b0\u6709\u7684\u529f\u80fd\uff0c\u5efa\u8bae\u4f7f\u7528 Qt \u5185\u7f6e\u65e5\u5fd7\u529f\u80fd<\/strong>\uff08qDebug<\/code>\u7b49\uff09\uff0c\u7ed3\u5408 \u81ea\u5b9a\u4e49\u65e5\u5fd7\u5904\u7406\u51fd\u6570<\/strong> \u6765\u5b9e\u73b0\u683c\u5f0f\u5316\u8f93\u51fa\u548c\u65e5\u5fd7\u7ba1\u7406\u3002<\/p>\n
                      \n
                    • \u4f7f\u7528 Qt \u5185\u7f6e\u65e5\u5fd7\u529f\u80fd<\/strong>\uff1a\u53ef\u4ee5\u6ee1\u8db3\u4f60\u5bf9\u683c\u5f0f\u5316\u8f93\u51fa\u3001\u65e5\u5fd7\u7b49\u7ea7\u63a7\u5236\u7684\u8981\u6c42\uff0c\u5e76\u4e14\u5bb9\u6613\u96c6\u6210\u5230\u73b0\u6709\u9879\u76ee\u4e2d\u3002<\/li>\n
                    • \u81ea\u5b9a\u4e49\u8f93\u51fa\u683c\u5f0f<\/strong>\uff1a\u901a\u8fc7 qInstallMessageHandler<\/code> \u81ea\u5b9a\u4e49\u8f93\u51fa\u683c\u5f0f\uff0c\u5305\u542b\u65f6\u95f4\u3001\u65e5\u5fd7\u7b49\u7ea7\u3001\u6587\u4ef6\u3001\u51fd\u6570\u3001\u884c\u6570\u7b49\u4fe1\u606f\u3002<\/li>\n
                    • \u8fd0\u884c\u65f6\u63a7\u5236\u65e5\u5fd7\u7ea7\u522b<\/strong>\uff1a\u53ef\u4ee5\u5728\u4ee3\u7801\u4e2d\u6216\u901a\u8fc7\u7f16\u8bd1\u9009\u9879\uff08\u5982#define QT_NO_DEBUG_OUTPUT<\/code>\uff09\u63a7\u5236\u65e5\u5fd7\u8f93\u51fa\u7684\u7ea7\u522b\uff0c\u9002\u5408\u5728\u4e0d\u540c\u73af\u5883\u4e2d\u4f7f\u7528\u3002<\/li>\n<\/ul>\n
                      \u5982\u679c\u4f60\u6709\u66f4\u9ad8\u7684\u6027\u80fd\u9700\u6c42\u6216\u590d\u6742\u7684\u65e5\u5fd7\u7ba1\u7406\u9700\u6c42\uff0c\u4e14\u4e0d\u4ecb\u610f\u5f15\u5165\u7b2c\u4e09\u65b9\u5e93\uff0cspdlog<\/code><\/strong> \u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u7684\u9009\u62e9\uff0c\u53ef\u4ee5\u63d0\u4f9b\u66f4\u4e30\u5bcc\u7684\u65e5\u5fd7\u529f\u80fd\u3002<\/p>\n
                      \u603b\u7ed3<\/strong><\/h3>\n
                      \u5bf9\u4e8e\u5927\u591a\u6570Qt\u5e94\u7528\uff0c\u4f7f\u7528Qt\u5185\u7f6e\u7684\u65e5\u5fd7\u529f\u80fd\u914d\u5408\u81ea\u5b9a\u4e49\u683c\u5f0f\u8f93\u51fa\uff0c\u5df2\u7ecf\u80fd\u591f\u6ee1\u8db3\u5e38\u89c1\u7684\u65e5\u5fd7\u9700\u6c42\u3002\u5982\u679c\u9700\u8981\u989d\u5916\u7684\u529f\u80fd\uff0c\u5982\u65e5\u5fd7\u8f6e\u8f6c\u3001\u5f02\u6b65\u5904\u7406\uff0c\u5219\u53ef\u4ee5\u8003\u8651\u5f15\u5165spdlog<\/code>\u7b49\u7b2c\u4e09\u65b9\u5e93\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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