qlistwidget中的增删改

void MainWindow::addCitySlots()//添加listWidget项的信息

{

    QString CityName = ui->CityLineEdit->text();

    QListWidgetItem* item = new QListWidgetItem;

    item->setText(CityName);

    ui->listWidget->addItem(item);

    ui->CityLineEdit->clear();

}

void MainWindow::deleteCitySlots()//删除listwidget中的项

{

    QListWidgetItem* item = ui->listWidget->takeItem(ui->listWidget->currentRow());

    delete item;

}

void MainWindow::changePushButton()//修改listWidget项的信息

{

    if(ui->listWidget->currentItem()!=Q_NULLPTR)

    {

        ui->listWidget->currentItem()->setText(ui->CityLineEdit->text());

    }

}