QT 使用QProcess 调用外部程序并截取输出流

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");
  }
}