代码

import sys

from PySide6.QtWidgets import QApplication,QWidget,QPushButton,QLineEdit

from login_t3 import Ui_Form
from second import Ui_Form2

from PySide6.QtCore import Qt


class MyWidget(Ui_Form,QWidget):
    def __init__(self):
        super().__init__()
        self.setupUi(self)

        self.pushButton=self.findChild(QPushButton,'pushButton')
        self.pushButton_2=self.findChild(QPushButton,'pushButton_2')

        self.lineEdit = self.findChild(QLineEdit, 'lineEdit')
        self.lineEdit_2 = self.findChild(QLineEdit, 'lineEdit_2')

        self.pushButton.clicked.connect(self.btn1_slot)
        self.pushButton_2.clicked.connect(self.close)

    def btn1_slot(self):
        user=self.lineEdit.text()
        pwd=self.lineEdit_2.text()
        if user == 'admin' and pwd == '123456':
            self.close()
            s.show()
        else:
            print("登录失败")
            self.lineEdit.clear()
            self.lineEdit_2.clear()



class Second(Ui_Form2,QWidget):
    def __init__(self):
        super().__init__()
        self.setupUi(self)




if __name__=='__main__':
    app=QApplication(sys.argv)

    my=MyWidget()
    s=Second()


    my.setWindowFlags(Qt.WindowType.FramelessWindowHint)
    my.setAttribute(Qt.WidgetAttribute.WA_TranslucentBackground)


    my.show()
    sys.exit(app.exec())