一个较完整的Qt用户登录界面设计

#include "logindialog.h" #include "ui_logindialog.h" #include <QCompleter> #include <QDebug> #include <QMessageBox> #include <QSqlRecord> #include <QSqlTableModel> loginDialog::loginDialog(QWidget *parent) : QDialog(parent), ui(new Ui::loginDialog) { ui->setupUi(this); setWindowTitle(tr("登陆"));//窗口标题 QStringList strings; strings << "Lily" << "Tom" << "Jack" << "小强" << "MacBook Pro" << "Mac Pro"; completer = new QCompleter(strings, this); ui->comboBox->clear(); ui->comboBox->addItems(strings); ui->comboBox->setEditable(true); ui->comboBox->setCompleter(completer); qDebug()<<__FUNCTION__<<"is running !"; ui->lineEditNumber->setEchoMode(QLineEdit::Password);//密码方式显示文本 QDialog::setModal( true );//设置模态，让该窗口一直在最前端 setAttribute(Qt::WA_DeleteOnClose,true);//关闭后释放内存 ui->lineEditNumber->setFocus();//设置焦点 } loginDialog::~loginDialog() { qDebug()<<__FUNCTION__<<"is running !"; delete ui; } void loginDialog::on_pushButtonLogin_clicked() { qDebug()<<ui->comboBox->currentText(); // if(ui->lineEditNumber->text() == passWord) // { // qDebug()<<"password is right!"; // emit passWordIsRight();//密码正确传信号给Mainwindow,从而显示参数设置界面 // this->close(); // } // else // { // QMessageBox msgBox(this); // msgBox.setText("The password is wrong."); // msgBox.exec(); // } QSqlTableModel model; model.setTable("user"); model.select(); int userCnt = 0; for(int i=0;i<model.rowCount();++i) { QSqlRecord record = model.record(i); QString name = record.value("name").toString(); QString passWord = record.value("passWord").toString(); qDebug()<<name<<passWord<<__FUNCTION__; if(ui->comboBox->currentText() == name){ qDebug()<<"用户名正确!"; if(ui->lineEditNumber->text() == passWord){ emit passWordIsRight();//密码正确传信号给Mainwindow,从而显示参数设置界面 this->close(); } else{ QMessageBox msgBox(this); msgBox.setText("The password is wrong."); msgBox.exec(); } userCnt++; } } if(!userCnt) { QMessageBox msgBox(this); msgBox.setText("该用户不存在！"); msgBox.exec(); } } void loginDialog::on_pushButtonEnter_clicked() { // QString str = ui->lineEditNumber->text(); // ui->lineEditNumber->clear(); // this->close(); } void loginDialog::on_pushButton1_clicked() { ui->lineEditNumber->setText(ui->lineEditNumber->text()+ui->pushButton1->text()); } void loginDialog::on_pushButton2_clicked() { ui->lineEditNumber->setText(ui->lineEditNumber->text()+ui->pushButton2->text()); } void loginDialog::on_pushButton3_clicked() { ui->lineEditNumber->setText(ui->lineEditNumber->text()+ui->pushButton3->text()); } void loginDialog::on_pushButton4_clicked() { ui->lineEditNumber->setText(ui->lineEditNumber->text()+ui->pushButton4->text()); } void loginDialog::on_pushButton5_clicked() { ui->lineEditNumber->setText(ui->lineEditNumber->text()+ui->pushButton5->text()); } void loginDialog::on_pushButton6_clicked() { ui->lineEditNumber->setText(ui->lineEditNumber->text()+ui->pushButton6->text()); } void loginDialog::on_pushButton7_clicked() { ui->lineEditNumber->setText(ui->lineEditNumber->text()+ui->pushButton7->text()); } void loginDialog::on_pushButton8_clicked() { ui->lineEditNumber->setText(ui->lineEditNumber->text()+ui->pushButton8->text()); } void loginDialog::on_pushButton9_clicked() { ui->lineEditNumber->setText(ui->lineEditNumber->text()+ui->pushButton9->text()); } void loginDialog::on_pushButton0_clicked() { ui->lineEditNumber->setText(ui->lineEditNumber->text()+ui->pushButton0->text()); } void loginDialog::on_pushButtonBack_clicked() { QString text = ui->lineEditNumber->text(); text.chop(1);//Removes n characters from the end of the string. // if (text.isEmpty()) { // text = "0"; // } ui->lineEditNumber->setText(text); }