Qt中ComboBox的简单使用

1.相关说明

combobox中item的文字、data、图片设置

2.界面绘制

3.相关主要代码

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
}

Widget::~Widget()
{
    delete ui;
}

// 清空列表
void Widget::on_btnClear_clicked()
{
    ui->plainTextEdit->clear();
}
// 初始化列表
void Widget::on_btnInitCities_clicked()
{
    QIcon icon;
    icon.addFile(":/png/images/chengshi.png");
    ui->comboBoxCities->clear();
    for(int i = 0; i < 20; i++){
        ui->comboBoxCities->addItem(icon, QString("Item%1").arg(i));
    }
}
// 清空列表
void Widget::on_btnClearList_clicked()
{
    ui->comboBoxCities->clear();
}
// 可编辑
void Widget::on_chkEdit_clicked(bool checked)
{
    ui->comboBoxCities->setEditable(checked);
}
// 初始化城市+区号
void Widget::on_btnCitiesNum_clicked()
{
    ui->comboxBoxCitiesNum->clear();
    QMap<QString, int> city_zone;
    city_zone.insert("北京", 1);
    city_zone.insert("上海", 2);
    city_zone.insert("深圳", 3);
    city_zone.insert("成都", 4);
    foreach(const QString str, city_zone.keys()){
        // ui->comboxBoxCitiesNum->addItem(str, city_zone.value(str));
        ui->comboxBoxCitiesNum->addItem(str, city_zone[str]);
    }
}

void Widget::on_comboBoxCities_currentTextChanged(const QString &arg1)
{
    ui->plainTextEdit->appendPlainText(arg1);
}

void Widget::on_comboxBoxCitiesNum_currentIndexChanged(int index)
{
    Q_UNUSED(index);
    QString str = ui->comboxBoxCitiesNum->currentText() + "-" + ui->comboxBoxCitiesNum->currentData().toString();
    ui->plainTextEdit->appendPlainText(str);
}