登录功能

1选择无按钮的dialog

2登录函数

#include <QApplication>
#include <QDialog>
#include <QFormLayout>
#include <QLineEdit>
#include <QPushButton>
#include <QMessageBox>class LoginDialog : public QDialog {
public:LoginDialog(QWidget *parent = nullptr) : QDialog(parent) {setWindowTitle("登录");// 创建输入框QLineEdit *usernameEdit = new QLineEdit(this);QLineEdit *passwordEdit = new QLineEdit(this);passwordEdit->setEchoMode(QLineEdit::Password);// 创建登录按钮QPushButton *loginButton = new QPushButton("登录", this);// 布局QFormLayout *layout = new QFormLayout(this);layout->addRow("用户名:", usernameEdit);layout->addRow("密码:", passwordEdit);layout->addWidget(loginButton);// 连接登录按钮的点击事件到槽函数connect(loginButton, &QPushButton::clicked, this, &LoginDialog::attemptLogin);}public slots:void attemptLogin() {// 在这里添加实际的登录验证逻辑// 这里只是简单的演示，假设用户名为 "admin"，密码为 "password"QString username = findChild<QLineEdit*>("usernameEdit")->text();QString password = findChild<QLineEdit*>("passwordEdit")->text();if (username == "admin" && password == "password") {QMessageBox::information(this, "登录成功", "登录成功！");accept();  // 关闭登录框并返回 Accepted} else {QMessageBox::warning(this, "登录失败", "用户名或密码错误！");}}
};int main(int argc, char *argv[]) {QApplication app(argc, argv);// 创建登录框对象LoginDialog loginDialog;// 显示登录框if (loginDialog.exec() == QDialog::Accepted) {// 登录成功，执行你的功能// 在这里添加你的代码qDebug() << "执行你的功能...";}return app.exec();
}

qt显示日志