#include <QtGlobal>#include <stdio.h>#include <stdlib.h>void myMessageOutput(QtMsgType type, const QMessageLogContext &context, const QString &msg){ QByteArray localMsg = msg.toLocal8Bit(); switch (type) { case QtDebugMsg: fprintf(stderr, "Debug: %s (%s:%u, %s)\n", localMsg.constData(), context.file, context.line, context.function); break; case QtInfoMsg: fprintf(stderr, "Info: %s (%s:%u, %s)\n", localMsg.constData(), context.file, context.line, context.function); break; case QtWarningMsg: fprintf(stderr, "Warning: %s (%s:%u, %s)\n", localMsg.constData(), context.file, context.line, context.function); break; case QtCriticalMsg: fprintf(stderr, "Critical: %s (%s:%u, %s)\n", localMsg.constData(), context.file, context.line, context.function); break; case QtFatalMsg: fprintf(stderr, "Fatal: %s (%s:%u, %s)\n", localMsg.constData(), context.file, context.line, context.function); abort(); }}int main(int argc, char **argv){ qInstallMessageHandler(myMessageOutput); // Install the handler QApplication app(argc, argv); ... return app.exec();}
#include <QCoreApplication>#include <QDebug>int main(int argc, char *argv[]){ QCoreApplication a(argc, argv); qDebug()<<"1234"; return a.exec();}