c++ - Qt避免警告QProcess : destroyed while process still running (Assistant)

Question

我正在运行一个启动进程的 Qt 应用程序。 (助手，从主应用启动)。

当我关闭应用程序时，我收到警告

QProcess:进程仍在运行时被销毁。

我怎样才能摆脱它？

我看到了这个similar question并试图杀死……什么也没发生。

这question似乎在说也许我应该添加 waitForFinished()...应用程序关闭时帮助不会关闭。

Help::Help():m_helpProcess(0) {}

Help::~Help()
{
  if (m_helpProcess) {
    m_helpProcess.waitForFinished();   // help stays open after app closes
    m_helpProcess->kill();   // added with no effect
    delete m_helpProcess;
  }
}

bool Help::start() 
{
  if (!m_helpProcess)
      process = new QProcess();
  QStringList args;
  args << QLatin1String("-collectionFile")
       << QLatin1String("mycollection.qhc");
  process->start(QLatin1String("Assistant.app"), args);
  if (!process->waitForStarted())
      return;
}

Answer 1

使用 close() 重写析构函数应该就足够了:

Closes all communication with the process and kills it. After calling this function, QProcess will no longer emit readyRead(), and data can no longer be read or written.

Help::~Help()
{
    if (m_helpProcess) {
        // m_helpProcess->waitForFinished();   // help stays open after app closes
        m_helpProcess->close();                // close channels
        delete m_helpProcess;                  // destructor actually kills the process  
    }
}