我的Qt代码有问题。我想编写一个正在获取点坐标的程序,然后该点正在绘制坐标点。我的程序在创建时没有任何错误或警告,但在开始时崩溃(MainWindow不显示)。这是我的代码:QT使用接受的信号连接崩溃
的main.cpp
#include <QApplication>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MainWindow win;
win.show();
return app.exec();
}
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QWidget>
#include <QAction>
#include <QToolBar>
#include <QTextCodec>
#include <QObject>
#include <QDialog>
#include <QLineEdit>
#include <QPushButton>
#include <QString>
#include "addpoint.h"
class MainWindow: public QMainWindow
{
Q_OBJECT
private:
QToolBar *AddToolbar;
QAction *AddPointAction;
AddPoint *AddPointDialog;
QLineEdit *x;
public:
MainWindow();
void createToolbar();
void createActionAdd();
signals:
public slots:
void PointClicked();
void DialogAccepted();
};
#endif // MAINWINDOW_H
mainwindow.cpp
#include "mainwindow.h"
MainWindow::MainWindow()
{
QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
createActionAdd();
createToolbar();
connect(AddPointAction, SIGNAL(triggered(bool)), this, SLOT(PointClicked()));
connect(AddPointDialog, SIGNAL(accepted()), this, SLOT(DialogAccepted()));
setMinimumSize(480, 320);
}
/**/
void MainWindow::createToolbar()
{
AddToolbar = new QToolBar;
AddToolbar->addAction(AddPointAction);
addToolBar(AddToolbar);
}
/**/
void MainWindow::createActionAdd()
{
AddPointAction = new QAction("Add Road", this);
x = new QLineEdit(this);
x->setFixedSize(100, 30);
x->move(100, 100);
}
/**/
void MainWindow::PointClicked()
{
AddPointDialog = new AddPoint(this);
AddPointDialog->setModal(true);
AddPointDialog->exec();
}
/**/
void MainWindow::DialogAccepted()
{
x->setText("abc");
}
addpoint.h
#ifndef ADDPOINT_H
#define ADDPOINT_H
#include <QWidget>
#include <QTextCodec>
#include <QDialog>
#include <QObject>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QString>
class AddPoint : public QDialog
{
Q_OBJECT
private:
QLabel *XpointL;
QLineEdit *XPoint;
QPushButton *OKButton;
public:
AddPoint(QWidget *parent);
void createButton();
signals:
public slots:
};
#endif // ADDPOINT_H
addpoint.cpp
#include "addpoint.h"
AddPoint::AddPoint(QWidget *parent) :QDialog(parent)
{
QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
createButton();
connect(OKButton, SIGNAL(clicked(bool)), this, SLOT(accept()));
setMinimumSize(320, 240);
}
/**/
void AddPoint::createButton()
{
XpointL = new QLabel("Point X:", this);
XpointL->setFixedSize(100, 30);
XpointL->move(10, 10);
XPoint = new QLineEdit(this);
XPoint->setFixedSize(180, 30);
XPoint->move(120, 10);
OKButton = new QPushButton("OK", this);
OKButton->setFixedSize(100, 30);
OKButton->move(200, 150);
}
运行的程序我aplication输出一圈后看到: “程序已意外结束了。” “C:\ QT \打造-XXX-Desktop_Qt_5_4_2_MSVC2013_64bit-调试\调试\ xx.exe哗啦啦”
我注意到,我做了一些实验,这个代码,我看到了,我有)在主窗口accpeted信号(问题的.cpp。我不知道我该怎么处理这个问题。我希望你能帮助我。