python 代码实例 --- GUI 登录界面

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QLineEdit, QPushButton, QVBoxLayout # type: ignore

class LoginWindow(QWidget):
    def __init__(self):
        super().__init__()
        self.init_ui()
    
    def init_ui(self):
        self.setWindowTitle('登录界面')
        self.setGeometry(300, 300, 300, 150)

        layout = QVBoxLayout()

        username_label = QLabel('用户名:', self)
        self.username_input = QLineEdit(self)
        password_label = QLabel('密码:', self)
        self.password_input = QLineEdit(self)
        self.password_input.setEchoMode(QLineEdit.Password)

        login_button = QPushButton('登录', self)
        login_button.clicked.connect(self.on_login_clicked)

        layout.addWidget(username_label)
        layout.addWidget(self.username_input)
        layout.addWidget(password_label)
        layout.addWidget(self.password_input)
        layout.addWidget(login_button)

        self.setLayout(layout)

    def on_login_clicked(self):
        username = self.username_input.text()
        password = self.password_input.text()
        print(f'用户名：{username}，密码：{password}')

app = QApplication(sys.argv)
login_window = LoginWindow()
login_window.show()
sys.exit(app.exec_())