你看看这个程序看能否有帮助 ,我以前好像也遇到过这样的情况 ,不过比你的简单
////////////////////////////////////////////////////////
#include <qapplication.h>
#include <qhbox.h>
#include <qthread.h>
#include <qlabel.h>
class WaitThread: public QThread
{
public:
WaitThread(QThread *thr1, QThread *thr2, QLabel *lbl);
void run();
private:
QThread *thread1, *thread2;
QLabel *label;
};
WaitThread::WaitThread(QThread *thr1, QThread *thr2, QLabel *lbl)
: thread1(thr1), thread2(thr2), label(lbl)
{
}
void WaitThread::run()
{
thread1->wait();
thread2->wait();
qApp->lock();
label->setText("<h1>Done!</h1>");
qApp->unlock();
}
class GUIThread : public QThread
{
public:
GUIThread( QLabel*, const QString& );
protected:
void run();
private:
QLabel* label;
QString text;
};
static QMutex* mutex;
GUIThread::GUIThread( QLabel* l, const QString& t )
: label( l ), text( t )
{
}
void GUIThread::run()
{
for ( int i = 0; i < 2; i++ ) {
mutex->lock();
qApp->lock();
label->setText(text);
qApp->unlock();
sleep( 1 );
mutex->unlock();
}
}
// The program starts here
int main( int argc, char** argv )
{
QApplication app( argc, argv );
mutex = new QMutex;
QHBox box( 0, 0, TRUE );
QLabel label( &box );
label.setAlignment(Qt::AlignCenter);
label.setMinimumSize(400, 300);
GUIThread first( &label, "<b>Ping</b>" );
GUIThread second( &label, "<i>Pong</i>" );
WaitThread third(&first, &second, &label);
first.start();
second.start();
app.setMainWidget( &box );
box.show();
third.start();
int r = app.exec();
delete mutex;
return r;
}
