QT 使用QProcess 调用外部程序并截取输出流

最新推荐文章于 2023-03-17 14:41:56 发布

转载最新推荐文章于 2023-03-17 14:41:56 发布 · 2.1k 阅读

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本文展示了如何在Qt应用程序中使用QProcess来执行外部进程，并通过信号槽机制实时捕获输出和错误信息。此外，还介绍了如何处理进程启动失败及异常退出的情况。

connect(&mProcess, SIGNAL(readyReadStandardOutput()), this, SLOT(redFromStdOut())); connect(&mProcess, SIGNAL(readyReadStandardError()), this, SLOT(redFromStdErr())); connect(&mProcess, SIGNAL(error(QProcess::ProcessError)), this, SLOT(processError(QProcess::ProcessError))); connect(&mProcess, SIGNAL(finished(int,QProcess::ExitStatus)), this, SLOT(processFinished(int,QProcess::ExitStatus)));

void FloodForecast::redFromStdOut() { ui.textBrowse->append(mProcess.readAllStandardOutput()); } void FloodForecast::redFromStdErr() { ui.textBrowse->append(mProcess.readAllStandardError()); } void FloodForecast::processError(QProcess::ProcessError error) { if(error==QProcess::FailedToStart) { ui.textBrowse->append("程序启动失败./r/n"); } } void FloodForecast::processFinished(int exitCode,QProcess::ExitStatus exitStatus) { if(exitStatus == QProcess::CrashExit) { ui.textBrowse->append("程序异常终止./r/n"); } else { ui.textBrowse->append("程序正常结束./r/n"); } }