qt实现QListWidget列表框

#include "m.h" #include <QApplication> #include <QWidget> #include <QListWidget> #include <QLabel> #include <QListWidgetItem> using namespace std; void QMyLabel::rsetText(QListWidgetItem *item){ this->setText(item->text()); } int main(int argc, char *argv[]) { QApplication a(argc, argv); //MainWindow w; //w.show(); //创建一个窗口，作为输入框的父窗口 QWidget widget; //设置窗口的标题 widget.setWindowTitle("QWidget窗口"); widget.resize(500,500); QListWidget listWidget(&widget); listWidget.resize(500,400); listWidget.setFont(QFont("宋体",14)); listWidget.addItem("hello china"); listWidget.addItem("hello beijing"); listWidget.addItem(new QListWidgetItem("hello hangzhou")); QMyLabel ml; ml.setText("选中内容"); ml.setParent(&widget); ml.resize(500,100); ml.move(0,400); ml.setAlignment(Qt::AlignCenter); QObject::connect(&listWidget,&QListWidget::itemClicked,&ml,&QMyLabel::rsetText); widget.show(); return a.exec(); } //#include "main.moc"