QT+QListWidget实现列表数据查询代码示例+详细注释

#include "qtguiapptest.h" #include "ui_qtguiapptest.h" QtGuiAppTest::QtGuiAppTest(QWidget *parent) : QWidget(parent) , ui(new Ui::QtGuiAppTest) { ui->setupUi(this); //为列表添加三行 ui->listWidget->addItems(QStringList() << "张三" << "李四" << "王五" << "张五" << "刘三一" ); //将按钮与槽函数连接起来 connect(ui->pushButton, &QPushButton::clicked, this, &QtGuiAppTest::SlotTestFindItem); } QtGuiAppTest::~QtGuiAppTest() { delete ui; } void QtGuiAppTest::SlotTestFindItem() { //获取linedit中要查找的字符串 QString str = ui->lineEdit->text(); //在列表中查找匹配的行,采用精确查找 QList<QListWidgetItem*> lstItems = ui->listWidget->findItems(str, Qt::MatchContains); //在label中展示查找到的结果 QString text; for(auto& it : lstItems) { text += it->data(Qt::DisplayRole).toString(); text += "\n"; } ui->label->setText(text); }