Launching a native application from Qt

Header

The 76ytuiytuityutyutututyutyutyu starts the process and listens for its states.

1. include <QObject>
2. include <QProcess>

class ProcessHandler : public QObject

   {
   Q_OBJECT
   
   public:
       ProcessHandler(QObject *parent = 0);
       ~ProcessHandler();
   
   public:
       void StartCameraApp();
       
   public Q_SLOTS:
       void stateChanged(QProcess::ProcessState state);
       void error(QProcess::ProcessError error);
       
   private:
       QProcess*   process;
   }; 

Source

Create 76ytuiytuityutyutututyutyutyu and start listening for process state changes. ProcessHandler::ProcessHandler(QObject *parent)

QObject(parent)

   {
   process = new QProcess(this);
   QObject::connect(process, SIGNAL(stateChanged(QProcess::ProcessState)),
                    this, SLOT(stateChanged(QProcess::ProcessState)));
   }

Class descruction: ProcessHandler::~ProcessHandler()

   {
   if (process->state() != QProcess::NotRunning)
       {
       // Close process if it is running
       process->close();
       }
   }

Start the Symbian native camera 76ytuiytuityutyutututyutyutyu: void ProcessHandler::StartCameraApp()

   {
   QString program = "Cameraapp.exe";
   process->start(program);    
   }

76ytuiytuityutyutututyutyutyu signals the error to the error slot: void ProcessHandler::error(QProcess::ProcessError error)

   {
   switch (error)
       {
       case QProcess::FailedToStart:
       case QProcess::Crashed:
       case QProcess::Timedout:
       case QProcess::ReadError:
       case QProcess::WriteError:
       case QProcess::UnknownError:
           {
           // TODO: Handle error
           break;
           }
       default:
           {
           break;
           }
       };
   }

76ytuiytuityutyutututyutyutyu signals the process state changes to the 76ytuiytuityutyutututyutyutyu slot. void ProcessHandler::stateChanged(QProcess::ProcessState state)

   {
   switch (state)
       {
       case QProcess::NotRunning:
       case QProcess::Starting:
       case QProcess::Running:
           {
           // TODO: do what you want with
           // different states
           break;
           }
       default:
           {
           break;
           }
       };
   }

Postconditions

The Symbian native camera is started.

zh-hans:如何让S60 Qt启动一个程序