模型/视图（QAbstractTableModel的使用）

程序

ModelEx继承自QAbstractTableModel类

ModelEx函数（建立模型）

.h
#ifndef MODELEX_H
#define MODELEX_H
#include <QAbstractTableModel>


class ModelEx : public QAbstractTableModel
{
public:
    ModelEx(QObject*parent=0);
    virtual int rowCount(const QModelIndex &parent=QModelIndex()) const;
    virtual int columnCount(const QModelIndex &parent=QModelIndex()) const;
    QVariant data(const QModelIndex &index, int role) const;
    QVariant headerData(int section, Qt::Orientation orientation, int role) const;
signals:
public slots:
private:
    QVector<short> army;
    QVector<short> weaponType;
    QMap<short,QString> armyMap;
    QMap<short,QString> weaponTypeMap;
    QStringList weapon;
    QStringList header;
    void populateModel();
};

#endif // MODELEX_H

.cpp
#include "modelex.h"

ModelEx::ModelEx(QObject*parent):QAbstractTableModel(parent)
{
    armyMap[1]=tr("空军");
    armyMap[2]=tr("海军");
    armyMap[3]=tr("陆军");
    armyMap[4]=tr("海军陆战队");
    weaponTypeMap[1]=tr("轰炸机");
    weaponTypeMap[2]=tr("战斗机");
    weaponTypeMap[3]=tr("航空母舰");
    weaponTypeMap[4]=tr("驱逐舰");
    weaponTypeMap[5]=tr("直升机");
    weaponTypeMap[6]=tr("坦克");
    weaponTypeMap[7]=tr("两栖攻击舰");
    weaponTypeMap[8]=tr("两栖战车");
    populateModel();
}
void ModelEx::populateModel()
{
    header<<tr("军种")<<tr("种类")<<tr("武器");
    army<<1<<2<<3<<4<<2<<4<<3<<1;
    weaponType<<1<<3<<5<<7<<4<<8<<6<<2;
    weapon<<tr("B-2")<<tr("尼米兹级")<<tr("阿帕奇")<<tr("黄蜂级")
            <<tr("阿利伯克级")<<tr("AAAV")<<tr("M1A1")<<tr("F-22");
}
int ModelEx::columnCount(const QModelIndex &parent) const//控制列数
{	 return 3;	   }
int ModelEx::rowCount(const QModelIndex &parent) const//控制行数
{
    return army.size();
}
QVariant ModelEx::data(const QModelIndex &index, int role) const//控制列数局
{
    if(!index.isValid())//所选不是有效的停止
        return QVariant();
    if(role==Qt::DisplayRole)				//条目显示文字
    {
        switch(index.column())
        {
        case 0:
            return armyMap[army[index.row()]];
            break;
        case 1:
            return weaponTypeMap[weaponType[index.row()]];
            break;
        case 2:
            return weapon[index.row()];
        default:
            return QVariant();
        }
    }
    return QVariant();
}
QVariant ModelEx::headerData(int section, Qt::Orientation orientation, int role) const//控制列标题
{
    if(role==Qt::DisplayRole&&orientation==Qt::Horizontal)
           return header[section];
    return QAbstractTableModel::headerData(section,orientation,role);
}

main函数（通过视图展示模型）

#include "mainwindow.h"
#include <QApplication>
#include "modelex.h"
#include <QTableView>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    ModelEx modelEx;
    QTableView view;
    view.setModel(&modelEx);
    view.setWindowTitle(QObject::tr("modelEx"));
    view.resize(400,400);
    view.show();
    //MainWindow w;
    //w.show();

    return a.exec();
}

效果展示