QT使用QComBox和QLineEdit实现模糊查询功能

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QEvent>
#include <QMainWindow>
 
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
 
    //模糊搜索
    void obscureSearch();
 
private:
    Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H

#include "mainwindow.h"
 
#include "ui_mainwindow.h"
 
#include <QCompleter>
#include <QListView>
#include <QStyledItemDelegate>
 
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    obscureSearch();
}
 
MainWindow::~MainWindow()
{
    delete ui;
}
 
void MainWindow::obscureSearch()
{
    QStringList list;
    list << "RCV_01" << "RCV_02" << "RCV_03" << "RCV_04";
    ui->comboBox->addItems(list);
 
    QString style = QString("QListView {"
                            "font-family: \"Arial\";"
                            "font-size: 13px; "
                            "outline: 0px;}"
                            "QListView::item {"
                            "padding: 3px 0x 3px 5px;"
                            "border-width: 0px;}"
                            "QListView::item:selected {"
                            "background-color: #004EA2;}"
                            "QListView::item:hover {"
                            "background-color: #E5F1FB}");
 
    ui->comboBox->setView(new QListView());
    ui->comboBox->setEditable(true);
    ui->comboBox->setLineEdit(ui->lineEdit);
    ui->comboBox->setMaxVisibleItems(5);
    ui->comboBox->view()->setStyleSheet(style);
 
    QCompleter *pCompleter = new QCompleter(list, this);
    QStyledItemDelegate *d = new QStyledItemDelegate;
    pCompleter->popup()->setItemDelegate(d);
    pCompleter->popup()->setStyleSheet(style);
    pCompleter->setCaseSensitivity(Qt::CaseInsensitive);
 
    ui->comboBox->setCompleter(pCompleter);
    ui->lineEdit->setCompleter(pCompleter);
 
    ui->lineEdit->clear();
}