qt的ListView中设置setIndexWidget

QStandardItemModel *model = new QStandardItemModel(ui->listView);
ui->listView->setModel(model);
for(int i = 0; i < 5; i++) {
QStandardItem *item = new QStandardItem(QString::number(i));
model->appendRow(item);
QModelIndex index = model->indexFromItem(item);
QCheckBox *box = new QCheckBox( ui->listView);
box->setCheckable(true);
box->setCheckState(Qt::Unchecked);
box->setText("ssss");
ui->listView->setIndexWidget(index, box);
}