Qt界面小例子，QSS样式,初学者可参考

#include "mainDialog.h" #include "ui_mainDialog.h" #include <QMessageBox> #include <QCloseEvent> MainDialog::MainDialog(QWidget *parent) : QDialog(parent), ui(new Ui::MainDialog) { ui->setupUi(this); connect(ui->pushButton_9, SIGNAL(clicked()),this,SLOT(abc())); connect(ui->lineEdit_2, SIGNAL(cursorPositionChanged(int, int)), this, SLOT(label_display(int, int))); connect(ui->lineEdit_3, SIGNAL(textChanged(QString)),this,SLOT(a(QString))); connect(ui->lineEdit_4, SIGNAL(textEdited(QString)),this,SLOT(b(QString))); connect(ui->lineEdit_5,SIGNAL(editingFinished(QString)),this,SLOT(c(QString))); //当编辑完成点回车，发射信号 } MainDialog::~MainDialog() { delete ui; } void MainDialog::abc(){ QMessageBox::information(this, "提示","按钮信号！！"); } void MainDialog::a(QString str){ ui->label_2->setText(str); } void MainDialog::b(QString str){ ui->label_3->setText(str); } void MainDialog::c(QString str){ QMessageBox::information(this, "提示",str); } void MainDialog::label_display(int old_pos, int new_pos){ QString pos_str1 = QString::number(old_pos, 10); QString pos_str2 = QString::number(new_pos, 10); //QMessageBox::information(this, "提示",pos_str1); ui->label->setText("move form "+pos_str1+" to "+ pos_str2); } void MainDialog::on_pushButton_clicked() { emit ExitWin(); this->close(); } void MainDialog::keyPressEvent(QKeyEvent *event) { switch (event->key()) { case Qt::Key_Escape: // 按下的为Esc键 break; // 不做反应直接退出 default: QDialog::keyPressEvent(event); } } void MainDialog::closeEvent(QCloseEvent * event) { switch( QMessageBox::information( this, tr("提示"), tr("确定要退出吗?"), tr("是"), tr("否"), 0, 1 ) ) { case 0: event->accept(); break; case 1: default: event->ignore(); break; } } void MainDialog::on_MainDialog_destroyed() { } void MainDialog::on_pushButtonSetting_clicked() { } void MainDialog::on_lineEdit_textChanged(const QString &arg1) { QMessageBox::information(this, "提示","按钮信号！！"); }