目录

效果图：

QDialog+QFileDialog文件导入+栅格布局

dialog.h

dialog.cpp

imputdlg.h

inputdlg.cpp

main.cpp

效果图：

QDialog+QFileDialog文件导入+栅格布局

dialog.h

#ifndef DIALOG_H
#define DIALOG_H

#include <QDialog>
#include <QString>
#include <QPushButton>
#include <QLineEdit>
#include <QGridLayout>
#include <QFileDialog>
#include "inputdlg.h"

class Dialog : public QDialog
{
    Q_OBJECT

public:
    Dialog(QWidget *parent = nullptr);
    ~Dialog();
private:
    QPushButton *fileBtn;
    QLineEdit *fileLineEdit;
    QGridLayout *mainLayout;
    QPushButton *inputBtn;
    InputDlg *inputDlg;

private slots:
    void showFiles();
    void showInputDlg();

};

#endif // DIALOG_H

dialog.cpp

#include "dialog.h"

Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
{
    setWindowTitle(QStringLiteral("登记管理"));
    fileBtn=new QPushButton;//各个控件对象的初始化
    fileBtn->setText(QStringLiteral("文件导入"));
    fileLineEdit=new QLineEdit;//用来显示选择的文件名
    inputBtn=new QPushButton;
    inputBtn->setText(QStringLiteral("成绩登记系统"));
    //添加布局管理
    mainLayout = new QGridLayout(this);
    mainLayout->addWidget(fileBtn,0,0);
    mainLayout->addWidget(fileLineEdit,0,1);
    mainLayout->addWidget(inputBtn,3,0);
    //事件关联
    connect(fileBtn,SIGNAL(clicked()),this,SLOT(showFiles()));
    connect(inputBtn,SIGNAL(clicked()),this,SLOT(showInputDlg()));
}

void Dialog::showFiles(){
    QString s=QFileDialog::getOpenFileName(this,"Open file dialog","/",
                                           "C++ files(*.cpp);;C files(*.c);;Head files(*.h)");
    fileLineEdit->setText(s);
}

void Dialog::showInputDlg(){
    inputDlg = new InputDlg(this);
    inputDlg->show();
}

Dialog::~Dialog()
{

}

imputdlg.h

#ifndef INPUTDLG_H
#define INPUTDLG_H

#include <QDialog>
#include <QLabel>
#include <QPushButton>
#include <QGridLayout>
#include <QString>

class InputDlg : public QDialog
{
        Q_OBJECT
public:
    InputDlg(QWidget *parent=nullptr);
private slots:
    void ChangeName();
    void ChangeSex();
    void ChangeAge();
    void ChangeScore();
private:
    QLabel *nameLabel1;
    QLabel *sexLabel1;
    QLabel *ageLabel1;
    QLabel *scoreLabel1;
    QLabel *nameLabel2;
    QLabel *sexLabel2;
    QLabel *ageLabel2;
    QLabel *scoreLabel2;
    QPushButton *nameBtn;
    QPushButton *sexBtn;
    QPushButton *ageBtn;
    QPushButton *scoreBtn;
    QGridLayout *mainLayout;
};

#endif // INPUTDLG_H

inputdlg.cpp

#include "inputdlg.h"

InputDlg::InputDlg(QWidget *parent):QDialog(parent)
{
    setWindowTitle(QStringLiteral("成绩等级系统"));
    //姓名
    nameLabel1=new QLabel;
    nameLabel1->setText(QStringLiteral("姓名："));
    nameLabel2=new QLabel;
    nameLabel2->setText(QStringLiteral("邓超"));
    nameLabel2->setFrameStyle(QFrame::Panel|QFrame::Sunken);
    nameBtn=new QPushButton;
    nameBtn->setText(QStringLiteral("修改姓名"));
    //性别
    sexLabel1=new QLabel;
    sexLabel1->setText(QStringLiteral("性别："));
    sexLabel2=new QLabel;
    sexLabel2->setText(QStringLiteral("男"));
    sexLabel2->setFrameStyle(QFrame::Panel|QFrame::Sunken);
    sexBtn=new QPushButton;
    sexBtn->setText(QStringLiteral("修改性别"));
    //年龄
    ageLabel1 = new QLabel;
    ageLabel1->setText(QStringLiteral("年龄："));
    ageLabel2=new QLabel;
    ageLabel2->setText(QStringLiteral("22"));
    ageLabel2->setFrameStyle(QFrame::Panel|QFrame::Sunken);
    ageBtn=new QPushButton;
    ageBtn->setText(QStringLiteral("修改年龄"));
    //成绩
    scoreLabel1 = new QLabel;
    scoreLabel1->setText(QStringLiteral("成绩："));
    scoreLabel2 = new QLabel;
    scoreLabel2->setText(QStringLiteral("98"));
    scoreLabel2->setFrameStyle(QFrame::Panel|QFrame::Sunken);
    scoreBtn=new QPushButton;
    scoreBtn->setText(QStringLiteral("修改成绩"));
    //布局设计
    mainLayout=new QGridLayout(this);
    mainLayout->addWidget(nameLabel1,0,0);
    mainLayout->addWidget(nameLabel2,0,1);
    mainLayout->addWidget(nameBtn,0,2);
    mainLayout->addWidget(sexLabel1,1,0);
    mainLayout->addWidget(sexLabel2,1,1);
    mainLayout->addWidget(sexBtn,1,2);
    mainLayout->addWidget(ageLabel1,2,0);
    mainLayout->addWidget(ageLabel2,2,1);
    mainLayout->addWidget(ageBtn,2,2);
    mainLayout->addWidget(scoreLabel1,3,0);
    mainLayout->addWidget(scoreLabel2,3,1);
    mainLayout->addWidget(scoreBtn,3,2);
    mainLayout->setMargin(15);
    mainLayout->setSpacing(50);
    //事件关联
    connect(nameBtn,SIGNAL(clicked()),this,SLOT(ChangeName()));
    connect(sexBtn,SIGNAL(clicked()),this,SLOT(ChangeSex()));
    connect(ageBtn,SIGNAL(clicked()),this,SLOT(ChangeAge()));
    connect(scoreBtn,SIGNAL(clicked()),this,SLOT(ChangeScore()));
}
void InputDlg::ChangeName(){
    bool ok;
    QString text=QInputDialog::getText(this,QStringLiteral("修改姓名"),QStringLiteral("输入姓名："),
                                       QLineEdit::Normal,nameLabel2->text(),&ok);
    if(ok&&!text.isEmpty()){
        nameLabel2->setText(text);
    }
}
void InputDlg::ChangeAge(){
    bool ok;
    int age=QInputDialog::getInt(this,QStringLiteral("修改年龄"),QStringLiteral("输入年龄："),
                                       ageLabel2->text().toInt(&ok),0,100,1,&ok);
    if(ok){
        ageLabel2->setText(QString(QStringLiteral("%1")).arg(age));//注意将qstring转换成整型
    }
}
void InputDlg::ChangeSex(){
    QStringList SexItems;
    SexItems<<QStringLiteral("男")<<QStringLiteral("女");
    bool ok;
    QString SexItem=QInputDialog::getItem(this,QStringLiteral("修改性别"),
                                          QStringLiteral("请选择性别:"),SexItems,0,false,&ok);
    if(ok&&!SexItem.isEmpty()){
        sexLabel2->setText(SexItem);
    }
}
void InputDlg::ChangeScore(){
    bool ok;
    int score=QInputDialog::getInt(this,QStringLiteral("修改分数"),QStringLiteral("输入分数："),
                                       ageLabel2->text().toInt(&ok),0,100,1,&ok);
    if(ok){
        scoreLabel2->setText(QString(QStringLiteral("%1")).arg(score));//注意将qstring转换成整型
    }
}

 main.cpp

#include "dialog.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Dialog w;
    w.show();

    return a.exec();
}