Qt 5デザイナQObject :: connect：そのようなスロットはありませんQDialog

Question

Designerで接続を作成した後、スロットの機能を変更しようとしました。そして、私はそのプライベートスロットを宣言し、それを初期化し、ビルドプログラムが実行されているが接続がうまくいきません。これは、自動にQtの dl.h

#ifndef DL_H 
#define DL_H 
#include <QDialog> 


namespace Ui { 
class Dl; 
} 

class Dl : public QDialog 
{ 
    Q_OBJECT 

public: 
    explicit Dl(QWidget *parent = 0); 
    ~Dl(); 

private: 
    Ui::Dl *ui; 
private slots: 
    void print_shit(); 
}; 
#endif 

dl.cpp

#include "dl.h" 
#include "ui_dl.h" 
#include <iostream> 


Dl::Dl(QWidget *parent) : 
    QDialog(parent), 
    ui(new Ui::Dl) 
{ 
    ui->setupUi(this); 
} 

Dl::~Dl() 
{ 
    delete ui; 
} 

void Dl::print_shit(){ 

} 

main.cppに

#include <QApplication> 
#include <QQmlApplicationEngine> 
#include "ui_dl.h" 

int main(int argc, char *argv[]) 
{ 
    QApplication app(argc, argv); 
    Ui_Dl * dialog = new Ui_Dl; 
    QDialog *wnd = new QDialog(); 

    dialog->setupUi(wnd); 
    wnd->show(); 

    return app.exec(); 
} 


#ifndef UI_DL_H 
#define UI_DL_H 

#include <QtCore/QVariant> 
#include <QtWidgets/QAction> 
#include <QtWidgets/QApplication> 
#include <QtWidgets/QButtonGroup> 
#include <QtWidgets/QDialog> 
#include <QtWidgets/QGridLayout> 
#include <QtWidgets/QHBoxLayout> 
#include <QtWidgets/QHeaderView> 
#include <QtWidgets/QPushButton> 
#include <QtWidgets/QSlider> 
#include <QtWidgets/QSpinBox> 
#include <QtWidgets/QWidget> 

QT_BEGIN_NAMESPACE 

class Ui_Dl 
{ 
public: 
    QWidget *layoutWidget; 
    QGridLayout *gridLayout; 
    QHBoxLayout *horizontalLayout_2; 
    QPushButton *pushButton_6; 
    QPushButton *knopka; 
    QHBoxLayout *horizontalLayout; 
    QPushButton *pushButton; 
    QPushButton *pushButton_2; 
    QPushButton *pushButton_3; 
    QHBoxLayout *horizontalLayout_3; 
    QPushButton *pushButton_8; 
    QPushButton *pushButton_7; 
    QPushButton *pushButton_9; 
    QSpinBox *spinBox; 
    QSlider *horizontalSlider; 

    void setupUi(QDialog *Dl) 
    { 
     if (Dl->objectName().isEmpty()) 
      Dl->setObjectName(QStringLiteral("Dl")); 
     Dl->setWindowModality(Qt::NonModal); 
     Dl->resize(705, 504); 
     QSizePolicy sizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred); 
     sizePolicy.setHorizontalStretch(0); 
     sizePolicy.setVerticalStretch(0); 
     sizePolicy.setHeightForWidth(Dl->sizePolicy().hasHeightForWidth()); 
     Dl->setSizePolicy(sizePolicy); 
     QPalette palette; 
     QBrush brush(QColor(0, 0, 0, 255)); 
     brush.setStyle(Qt::SolidPattern); 
     palette.setBrush(QPalette::Active, QPalette::WindowText, brush); 
     QBrush brush1(QColor(153, 240, 185, 255)); 
     brush1.setStyle(Qt::SolidPattern); 
     palette.setBrush(QPalette::Active, QPalette::Button, brush1); 
     QBrush brush2(QColor(255, 255, 255, 255)); 
     brush2.setStyle(Qt::SolidPattern); 
     palette.setBrush(QPalette::Active, QPalette::Light, brush2); 
     QBrush brush3(QColor(204, 247, 220, 255)); 
     brush3.setStyle(Qt::SolidPattern); 
     palette.setBrush(QPalette::Active, QPalette::Midlight, brush3); 
     QBrush brush4(QColor(76, 120, 92, 255)); 
     brush4.setStyle(Qt::SolidPattern); 
     palette.setBrush(QPalette::Active, QPalette::Dark, brush4); 
     QBrush brush5(QColor(102, 160, 123, 255)); 
     brush5.setStyle(Qt::SolidPattern); 
     palette.setBrush(QPalette::Active, QPalette::Mid, brush5); 
     palette.setBrush(QPalette::Active, QPalette::Text, brush); 
     palette.setBrush(QPalette::Active, QPalette::BrightText, brush2); 
     palette.setBrush(QPalette::Active, QPalette::ButtonText, brush); 
     palette.setBrush(QPalette::Active, QPalette::Base, brush2); 
     palette.setBrush(QPalette::Active, QPalette::Window, brush1); 
     palette.setBrush(QPalette::Active, QPalette::Shadow, brush); 
     palette.setBrush(QPalette::Active, QPalette::AlternateBase, brush3); 
     QBrush brush6(QColor(255, 255, 220, 255)); 
     brush6.setStyle(Qt::SolidPattern); 
     palette.setBrush(QPalette::Active, QPalette::ToolTipBase, brush6); 
     palette.setBrush(QPalette::Active, QPalette::ToolTipText, brush); 
     palette.setBrush(QPalette::Inactive, QPalette::WindowText, brush); 
     palette.setBrush(QPalette::Inactive, QPalette::Button, brush1); 
     palette.setBrush(QPalette::Inactive, QPalette::Light, brush2); 
     palette.setBrush(QPalette::Inactive, QPalette::Midlight, brush3); 
     palette.setBrush(QPalette::Inactive, QPalette::Dark, brush4); 
     palette.setBrush(QPalette::Inactive, QPalette::Mid, brush5); 
     palette.setBrush(QPalette::Inactive, QPalette::Text, brush); 
     palette.setBrush(QPalette::Inactive, QPalette::BrightText, brush2); 
     palette.setBrush(QPalette::Inactive, QPalette::ButtonText, brush); 
     palette.setBrush(QPalette::Inactive, QPalette::Base, brush2); 
     palette.setBrush(QPalette::Inactive, QPalette::Window, brush1); 
     palette.setBrush(QPalette::Inactive, QPalette::Shadow, brush); 
     palette.setBrush(QPalette::Inactive, QPalette::AlternateBase, brush3); 
     palette.setBrush(QPalette::Inactive, QPalette::ToolTipBase, brush6); 
     palette.setBrush(QPalette::Inactive, QPalette::ToolTipText, brush); 
     palette.setBrush(QPalette::Disabled, QPalette::WindowText, brush4); 
     palette.setBrush(QPalette::Disabled, QPalette::Button, brush1); 
     palette.setBrush(QPalette::Disabled, QPalette::Light, brush2); 
     palette.setBrush(QPalette::Disabled, QPalette::Midlight, brush3); 
     palette.setBrush(QPalette::Disabled, QPalette::Dark, brush4); 
     palette.setBrush(QPalette::Disabled, QPalette::Mid, brush5); 
     palette.setBrush(QPalette::Disabled, QPalette::Text, brush4); 
     palette.setBrush(QPalette::Disabled, QPalette::BrightText, brush2); 
     palette.setBrush(QPalette::Disabled, QPalette::ButtonText, brush4); 
     palette.setBrush(QPalette::Disabled, QPalette::Base, brush1); 
     palette.setBrush(QPalette::Disabled, QPalette::Window, brush1); 
     palette.setBrush(QPalette::Disabled, QPalette::Shadow, brush); 
     palette.setBrush(QPalette::Disabled, QPalette::AlternateBase, brush1); 
     palette.setBrush(QPalette::Disabled, QPalette::ToolTipBase, brush6); 
     palette.setBrush(QPalette::Disabled, QPalette::ToolTipText, brush); 
     Dl->setPalette(palette); 
     Dl->setCursor(QCursor(Qt::ArrowCursor)); 
     Dl->setAutoFillBackground(false); 
     Dl->setSizeGripEnabled(true); 
     layoutWidget = new QWidget(Dl); 
     layoutWidget->setObjectName(QStringLiteral("layoutWidget")); 
     layoutWidget->setGeometry(QRect(140, 90, 421, 351)); 
     gridLayout = new QGridLayout(layoutWidget); 
     gridLayout->setObjectName(QStringLiteral("gridLayout")); 
     gridLayout->setContentsMargins(0, 0, 0, 0); 
     horizontalLayout_2 = new QHBoxLayout(); 
     horizontalLayout_2->setObjectName(QStringLiteral("horizontalLayout_2")); 
     horizontalLayout_2->setSizeConstraint(QLayout::SetNoConstraint); 
     pushButton_6 = new QPushButton(layoutWidget); 
     pushButton_6->setObjectName(QStringLiteral("pushButton_6")); 
     sizePolicy.setHeightForWidth(pushButton_6->sizePolicy().hasHeightForWidth()); 
     pushButton_6->setSizePolicy(sizePolicy); 
     pushButton_6->setMaximumSize(QSize(191, 103)); 
     pushButton_6->setMouseTracking(false); 
     pushButton_6->setAcceptDrops(false); 
     pushButton_6->setAutoFillBackground(false); 
     pushButton_6->setStyleSheet(QStringLiteral("border-image: url(:/new/prefix1/lico);")); 
     pushButton_6->setCheckable(false); 
     pushButton_6->setAutoRepeat(false); 
     pushButton_6->setAutoExclusive(false); 
     pushButton_6->setAutoDefault(true); 
     pushButton_6->setFlat(false); 

     horizontalLayout_2->addWidget(pushButton_6); 

     knopka = new QPushButton(layoutWidget); 
     knopka->setObjectName(QStringLiteral("knopka")); 
     knopka->setEnabled(true); 
     sizePolicy.setHeightForWidth(knopka->sizePolicy().hasHeightForWidth()); 
     knopka->setSizePolicy(sizePolicy); 
     knopka->setSizeIncrement(QSize(0, 0)); 
     knopka->setMouseTracking(false); 
     knopka->setAutoFillBackground(false); 
     knopka->setStyleSheet(QStringLiteral("")); 
     knopka->setCheckable(false); 
     knopka->setAutoDefault(true); 
     knopka->setFlat(false); 

     horizontalLayout_2->addWidget(knopka); 


     gridLayout->addLayout(horizontalLayout_2, 1, 0, 1, 1); 

     horizontalLayout = new QHBoxLayout(); 
     horizontalLayout->setObjectName(QStringLiteral("horizontalLayout")); 
     horizontalLayout->setSizeConstraint(QLayout::SetNoConstraint); 
     pushButton = new QPushButton(layoutWidget); 
     pushButton->setObjectName(QStringLiteral("pushButton")); 
     QSizePolicy sizePolicy1(QSizePolicy::Minimum, QSizePolicy::Preferred); 
     sizePolicy1.setHorizontalStretch(0); 
     sizePolicy1.setVerticalStretch(0); 
     sizePolicy1.setHeightForWidth(pushButton->sizePolicy().hasHeightForWidth()); 
     pushButton->setSizePolicy(sizePolicy1); 
     pushButton->setMouseTracking(false); 
     pushButton->setCheckable(false); 

     horizontalLayout->addWidget(pushButton); 

     pushButton_2 = new QPushButton(layoutWidget); 
     pushButton_2->setObjectName(QStringLiteral("pushButton_2")); 
     sizePolicy1.setHeightForWidth(pushButton_2->sizePolicy().hasHeightForWidth()); 
     pushButton_2->setSizePolicy(sizePolicy1); 
     pushButton_2->setMinimumSize(QSize(125, 104)); 
     pushButton_2->setMouseTracking(false); 
     pushButton_2->setCheckable(false); 

     horizontalLayout->addWidget(pushButton_2); 

     pushButton_3 = new QPushButton(layoutWidget); 
     pushButton_3->setObjectName(QStringLiteral("pushButton_3")); 
     sizePolicy.setHeightForWidth(pushButton_3->sizePolicy().hasHeightForWidth()); 
     pushButton_3->setSizePolicy(sizePolicy); 
     pushButton_3->setMouseTracking(false); 
     pushButton_3->setCheckable(false); 

     horizontalLayout->addWidget(pushButton_3); 


     gridLayout->addLayout(horizontalLayout, 0, 0, 1, 1); 

     horizontalLayout_3 = new QHBoxLayout(); 
     horizontalLayout_3->setObjectName(QStringLiteral("horizontalLayout_3")); 
     horizontalLayout_3->setSizeConstraint(QLayout::SetNoConstraint); 
     pushButton_8 = new QPushButton(layoutWidget); 
     pushButton_8->setObjectName(QStringLiteral("pushButton_8")); 
     sizePolicy1.setHeightForWidth(pushButton_8->sizePolicy().hasHeightForWidth()); 
     pushButton_8->setSizePolicy(sizePolicy1); 
     pushButton_8->setMouseTracking(false); 
     pushButton_8->setStyleSheet(QString::fromUtf8("border-image: url(C:/Users/Acer/Pictures/Screenshot \320\273\320\270\321\206\320\276(\320\260\320\262\320\260\321\202\320\260\321\200).png);")); 
     pushButton_8->setCheckable(false); 

     horizontalLayout_3->addWidget(pushButton_8); 

     pushButton_7 = new QPushButton(layoutWidget); 
     pushButton_7->setObjectName(QStringLiteral("pushButton_7")); 
     sizePolicy1.setHeightForWidth(pushButton_7->sizePolicy().hasHeightForWidth()); 
     pushButton_7->setSizePolicy(sizePolicy1); 
     pushButton_7->setMouseTracking(false); 
     pushButton_7->setStyleSheet(QStringLiteral("border-image: url(:/new/prefix1/lico);")); 
     pushButton_7->setCheckable(false); 

     horizontalLayout_3->addWidget(pushButton_7); 

     pushButton_9 = new QPushButton(layoutWidget); 
     pushButton_9->setObjectName(QStringLiteral("pushButton_9")); 
     sizePolicy.setHeightForWidth(pushButton_9->sizePolicy().hasHeightForWidth()); 
     pushButton_9->setSizePolicy(sizePolicy); 
     pushButton_9->setMouseTracking(false); 
     pushButton_9->setCheckable(false); 

     horizontalLayout_3->addWidget(pushButton_9); 


     gridLayout->addLayout(horizontalLayout_3, 2, 0, 1, 1); 

     spinBox = new QSpinBox(Dl); 
     spinBox->setObjectName(QStringLiteral("spinBox")); 
     spinBox->setGeometry(QRect(590, 250, 101, 121)); 
     horizontalSlider = new QSlider(Dl); 
     horizontalSlider->setObjectName(QStringLiteral("horizontalSlider")); 
     horizontalSlider->setGeometry(QRect(470, 470, 160, 22)); 
     horizontalSlider->setOrientation(Qt::Horizontal); 

     retranslateUi(Dl); 
     QObject::connect(knopka, SIGNAL(clicked()), Dl, SLOT(print_shit())); 

     QMetaObject::connectSlotsByName(Dl); 
    } // setupUi 

    void retranslateUi(QDialog *Dl) 
    { 
     Dl->setWindowTitle(QApplication::translate("Dl", "Dialog", 0)); 
     pushButton_6->setText(QApplication::translate("Dl", "\320\243\320\272\321\200\320\260\320\270\320\275\320\260", 0)); 
     knopka->setText(QApplication::translate("Dl", "\320\234\320\270\321\201\321\202\320\265\321\200 \320\264\321\203\320\264\320\265\321\206", 0)); 
     pushButton->setText(QApplication::translate("Dl", "\320\257 \320\265\320\261\321\203 \321\201\320\276\320\261\320\260\320\272", 0)); 
#ifndef QT_NO_TOOLTIP 
     pushButton_2->setToolTip(QApplication::translate("Dl", "<html><head/><body><p><br/></p></body></html>", 0)); 
#endif // QT_NO_TOOLTIP 
     pushButton_2->setText(QApplication::translate("Dl", "\320\242\321\200\320\260\320\274\320\277", 0)); 
     pushButton_3->setText(QApplication::translate("Dl", "\320\234\320\270\321\201\321\202\321\200\320\265 \320\264\321\203\320\264\320\265\321\206", 0)); 
     pushButton_8->setText(QApplication::translate("Dl", "\320\242\321\200\320\260\320\274\320\277", 0)); 
     pushButton_7->setText(QApplication::translate("Dl", "\320\243\320\272\321\200\320\260\320\270\320\275\320\260", 0)); 
     pushButton_9->setText(QApplication::translate("Dl", "\320\257 \320\265\320\261\321\203 \321\201\320\276\320\261\320\260\320\272", 0)); 
    } // retranslateUi 

}; 

namespace Ui { 
    class Dl: public Ui_Dl {}; 
} // namespace Ui 

QT_END_NAMESPACE 

#endif // UI_DL_H 

によって生成された私は、問題はui_dl.hにすることができると思い QObject::connect: No such slot QDialog

語ります

Answer 1

2つの問題が考えられます。

1. あなたが合格* QDialogとしてSetupUIへのDI：

   void setupUi(QDialog *Dl) { 
   … 
   } 
   

   しかし、あなたのスロットは、カスタムクラスDlで定義されています。だからQtはQDialogにprint_shit()というスロットがないと言っています。

   さらに

2. connectSlotsByName特定naming conventionに従うためにあなたのスロットを必要とします。

無効QMetaObject :: connectSlotsByName（QObjectを*対象）

検索を再帰的に与えられたすべての子オブジェクトのために次の形式に従ったオブジェクトのスロットに接続します。

void on_<object name>_<signal name>(<signal parameters>);

オブジェクトに、オブジェクト名button1のQPushButtonタイプの子オブジェクトがあるとしましょう。スロットがキャッチするボタンのクリック（）信号は次のようになります。

void on_button1_clicked();

あなたはあなたのクラスDlで、このようなスロットを持っていないようです。