我一直在寻找拖车日，但没有什么可以帮助我。我想在函数运行时断开所有信号。主要技巧是发射信号的类和接收信号的类都是不同的类。我在类中有一个发出信号的QPushButton，我的自定义类Screen接收信号，它们都是连接的。

The class that manages events (class sender)

    Game::Game(QWidget *parent)
         : QGraphicsView(parent)
        {
            //.................................//some declaration
        
            //add the main screen
            Screen * screen = new Screen();
            screen->SetImageOnTheScreen();
            scene->addItem(screen);
        
            //make the lunch work
            QPushButton * GO = new QPushButton;
            GO->setText("GO!!!");
            GO->setGeometry(134,-98,134,99);
            scene->addWidget(GO);
            QObject::connect(GO, SIGNAL(clicked(bool)), screen, SLOT(generate())); 
            //want to disconnect this connection while generate() doing its job
        
            //.................................//some declaration
        
        }

Class receiver

void Screen::SetImageOnTheScreen()
    {
        //.................................//some declaration
    }
    
    void Screen::setWinningIcon()
    {
        //.................................//some declaration
    }
    
    void Screen::generate()
    {
        line = 0;
    
        std::random_shuffle(mas, mas + 27);
    
        SetImageOnTheScreen();
    
        if(mas[0] == mas[1] || mas[0] == mas[2] || mas[1] == mas[2])
        {
            line = 1;
    
            delay();
            setWinningIcon();
    
            delay();
            SetImageOnTheScreen();
        }
    
        if(mas[3] == mas[4] || mas[3] == mas[5] || mas[4] == mas[5])
        {
            line = 2;
    
            delay();
            setWinningIcon();
    
            delay();
            SetImageOnTheScreen();
        }
    
        if(mas[6] == mas[7] || mas[6] == mas[8] || mas[7] == mas[8])
        {
            line = 3;
    
            delay();
            setWinningIcon();
    
            delay();
            SetImageOnTheScreen();
        }
    }

我试图使用disconnect，但什么都没有。正在尝试使用 QObject::blockSignals()同样的故事。

请任何帮助会很棒！！

更新

game.h

#ifndef GAME_H
#define GAME_H
#include <QGraphicsScene>
#include <QGraphicsView>
#include <QPushButton>
#include "screen.h"
class Game : public QGraphicsView
{
private:
    QGraphicsScene * scene;
    QPushButton * GO;
    Screen * screen;
protected:
    virtual void wheelEvent (QWheelEvent * event);
public:
    Game(QWidget *parent = 0);
    ~Game();
};
#endif // GAME_H

game.cpp

#include "game.h"
#include <QGraphicsGridLayout>
#include <QDebug>
#include <QPushButton>
#include "screen.h"
#include <QStyle>
Game::Game(QWidget *parent)
    : QGraphicsView(parent)
{
    scene = new QGraphicsScene(this);
    scene->setSceneRect(0,0,400,200);
    screen = new Screen;
    screen->SetImageOnTheScreen();
    scene->addItem(screen);
    GO = new QPushButton;
    GO->setGeometry(0,0,100,50);
    GO->setText("GO");
    QObject::connect(GO, SIGNAL(clicked(bool)), screen, SLOT(generate()));
    //when generate is processing i want to disconnect the button "GO" and the "screen"
    scene->addWidget(GO);
    setScene(scene);
    show();
}
void Game::wheelEvent(QWheelEvent * event)
{
    if (event->type() == QEvent::Wheel)
        return;
    return;
}
Game::~Game()
{
}

screen.h

#ifndef SCREEN_H
#define SCREEN_H
#include <QGraphicsPixmapItem>
#include <QGraphicsTextItem>
class Screen : public QObject, public QGraphicsPixmapItem
{
    Q_OBJECT
private:
    int mas[27];
    int line;
    QGraphicsTextItem * text;
public:
    Screen(QGraphicsPixmapItem * parent = 0);
    void delay(int msecs);
    void setWinningIcon();
    void SetImageOnTheScreen();
public slots:
    void generate();
};
#endif // SCREEN_H

screen.cpp

#include "screen.h"
#include <QDebug>
#include <QTime>
#include <QCoreApplication>
#include "game.h"
Screen::Screen(QGraphicsPixmapItem * parent)
    : QObject(), QGraphicsPixmapItem(parent)
{
    for(int i = 0, j =1; i < 27; i++, j++)
    {
        if(j == 10)
            j = 1;
        mas[i] = j;
    }
    line = 0;
    text = new QGraphicsTextItem(this);
}
void Screen::delay(int msecs)
{
    QTime dieTime= QTime::currentTime().addMSecs(msecs);
    while (QTime::currentTime() < dieTime)
        QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
}
void Screen::setWinningIcon()
{
    switch(line)
    {
    case 1:
        text->setPlainText("TEST_#2 I'm NOT allowed to press /GO/ nfor 3 seconds but i can");
        text->setDefaultTextColor(Qt::red);
        break;
    case 2:
        text->setPlainText("TEST_#3 I'm NOT allowed to press /GO/ nfor 3 seconds but i can");
        text->setDefaultTextColor(Qt::red);
        break;
    case 3:
        text->setPlainText("TEST_#4 I'm NOT allowed to press /GO/ nfor 3 seconds but i can");
        text->setDefaultTextColor(Qt::red);
        break;
    }
}
void Screen::SetImageOnTheScreen()
{
    text->setPlainText("TEST_#1 I'm ALLOWED to press /GO/");
    text->setPos(0,50);
    text->setDefaultTextColor(Qt::green);
}
void Screen::generate()
{
    //In here i want to prevent to press "GO" while "generate()" is processing
    //Screen::grabMouse(); //here it is my solution
    std::random_shuffle(mas, mas + 27);
    SetImageOnTheScreen();
    if(mas[0] == mas[1] || mas[0] == mas[2] || mas[1] == mas[2])
    {
        line = 1;
        delay(500);
        setWinningIcon();
        delay(3000);
        SetImageOnTheScreen();
    }
    if(mas[3] == mas[4] || mas[3] == mas[5] || mas[4] == mas[5])
    {
        line = 2;
        delay(500);
        setWinningIcon();
        delay(3000);
        SetImageOnTheScreen();
    }
    if(mas[6] == mas[7] || mas[6] == mas[8] || mas[7] == mas[8])
    {
        line = 3;
        delay(500);
        setWinningIcon();
        delay(3000);
        SetImageOnTheScreen();
    }
    //Screen::ungrabMouse(); //here it is my solution
}

main.cpp

#include "game.h"
#include <QApplication>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Game w;
    w.show();
    return a.exec();
}