1、 模型视图实例一， QFileSystemModel  QTreeView ，model/view示例。

#include <QApplication>

#include <QFileSystemModel>

#include <QTreeView>

#include <QListView>

#include <QStandardItemModel>

#include <QDebug>

int main(int argc, char *argv[])

{

    QApplication a(argc, argv);

    QFileSystemModel model;

    model.setRootPath("/");

    QTreeView tree;

    tree.setModel(&model);

    tree.setRootIndex(model.index("/"));

    tree.setFixedSize(500, 400);

    tree.show();

    return a.exec();

}

2. QStandardItemModel 模型

#include "dialog.h"

#include <QApplication>

#include <QFileSystemModel>

#include <QTreeView>

#include <QListView>

#include <QStandardItemModel>

#include <QDebug>

int main(int argc, char *argv[])

{

    QApplication a(argc, argv);

    QStandardItemModel model;

    QStandardItem *parentItem = model.invisibleRootItem();

    QStandardItem *item0 = new QStandardItem;

    item0->setText("A");

    QPixmap pixmap0(50, 50);

    pixmap0.fill("red");

    item0->setIcon(QIcon(pixmap0));

    item0->setToolTip("indexA");

    parentItem->appendRow(item0);

    parentItem = item0;

    QStandardItem *item1 = new QStandardItem;

    item1->setText("B");

    QPixmap pixmap1(50, 50);

    pixmap1.fill("green");

    item1->setIcon(QIcon(pixmap1));

    item1->setToolTip("indexB");

    parentItem->appendRow(item1);

    QStandardItem *item2 = new QStandardItem;

    item2->setText("C");

    QPixmap pixmap2(50, 50);

    pixmap2.fill("blue");

    item2->setIcon(QIcon(pixmap2));

    item2->setToolTip("indexC");

    parentItem->appendRow(item2);

    QTreeView view;

    view.setModel(&model);

    view.show();

    QModelIndex indexA = model.index(0,0,QModelIndex());

    qDebug() << "indexA row count: " << model.rowCount(indexA);

    QModelIndex indexB = model.index(1,0,indexA);

    qDebug() << "indexB text: " << model.data(indexB, Qt::EditRole).toString();

    return a.exec();

}