在Qt中使用非静态datamember Ui_Mainwindow::(Pushbutton)无效

I have defined some QTableWidget by using inheritance and some buttons by Qt Creator.

我通过使用继承和Qt创建者的一些按钮定义了一些QTableWidget。

Now I'm trying to connect a signal from my button to a slot from my QTableWidget.

现在，我正在尝试将一个信号从按钮连接到QTableWidget的一个插槽。

Here in main() I have defined my Food object of self defined(re-defined) QTableWidget:

在main()中，我定义了自定义(重新定义)QTableWidget的Food对象:

Table Food(&w,3,700,50,610,getdata_foodtabel());

And in next line I tried to connect it with my QPushButton object(orderButton):

在下一行，我尝试将它与我的QPushButton对象(orderButton)连接:

QObject::connect(Ui::MainWindow::orderButton, SIGNAL(w.on_orderButton_clicked()),&Food, SLOT(Food.get_number()));

And in this line I get this error:

在这一行，我得到了这个误差:

 error: invalid use of non-static data member 'Ui_MainWindow::orderButton'
 QPushButton *orderButton;
              ^

And also get number is a self defined public slot in Table class

get number是表类中自定义的公共槽

can any body tell me why is this error for? and what should I do to fix it?

有没有人能告诉我为什么这个错误?我该怎么做才能修复它呢?

my table's constructor int Table.cpp:

我的表的构造函数int table .cpp:

Table::Table(QWidget *Parent,int row,int X,int Y,int height,std::vector     <std::vector <std::string > > food)
  :QTableWidget(food.size(),3,Parent)
{

this->setGeometry(QRect(X,Y,321,height));
this->setStyleSheet(QStringLiteral("background-color: rgb(206, 255, 255);"));
this->row=food.size();
for(int i=0;i<this->row;i++)
        this->food.push_back(food[i]);
for (int i=0;i<this->row;i++)
{
  //  this->food[i][0]=names[i];
   // this->food[i][1]=costs[i];
    this->setCellWidget(i,0,new label(QString::fromStdString(food[i][0])));
    this->setCellWidget(i,1,new label (QString::fromStdString(food[i][1])));
    this->setCellWidget(i,2,new QSpinBox);
}

 }

and my main function:

我的主要功能:

 int main(int argc, char *argv[])
 {
    QApplication a(argc, argv);
    MainWindow w;
    Table Drinks(&w,3,40,50,280,getdata_drinktabel());
       Drinks.setHorizontalHeaderLabels(QString("نوشیدنی;قیمت;تعداد").split(";"));
       Table Desert(&w,3,40,380,280,getdata_desertabel());
        Desert.setHorizontalHeaderLabels(QString("دسر;قیمت;تعداد").split(";"));
        Table Appetizer(&w,3,370,50,610,getdata_beforetabel());
        Appetizer.setHorizontalHeaderLabels(QString("پیش غذا;قیمت;تعداد").split(";"));
        Table* Food=new Table(&w,3,700,50,610,getdata_foodtabel());
        Food->setHorizontalHeaderLabels(QString(" غذا;قیمت;تعداد").split(";"));
        Food->setStyleSheet(QStringLiteral("background-image: url(:/soltani-edited1.jpg);"));
        QObject::connect(Ui::MainWindow::orderButton, SIGNAL(clicked()),Food, SLOT(Food.get_number()));
        w.show();
    return a.exec();
}

1 个解决方案

#1

I fixed it in another way...

我用了另一种方法……

I just inherited a class from QPushButton and connected it's signal to Food's slot.

我刚刚从QPushButton继承了一个类并将它的信号连接到Food的插槽上。

#1