PyQt5登录界面跳转

1、设计ui界面

设计后的ui界面

在这里可以设置密码不显示

这里可以设置快捷键

最后将ui界面转为py文件后获得的逻辑代码为：（文件名为Login.py）

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'longui.ui'
#
# Created by: PyQt5 UI code generator 5.15.4
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(383, 208)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(150, 140, 75, 23))
        self.pushButton.setObjectName("pushButton")
        self.widget = QtWidgets.QWidget(self.centralwidget)
        self.widget.setGeometry(QtCore.QRect(100, 50, 41, 61))
        self.widget.setObjectName("widget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.widget)
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout.setObjectName("verticalLayout")
        self.label = QtWidgets.QLabel(self.widget)
        self.label.setObjectName("label")
        self.verticalLayout.addWidget(self.label)
        self.label_2 = QtWidgets.QLabel(self.widget)
        self.label_2.setObjectName("label_2")
        self.verticalLayout.addWidget(self.label_2)
        self.widget1 = QtWidgets.QWidget(self.centralwidget)
        self.widget1.setGeometry(QtCore.QRect(140, 50, 131, 61))
        self.widget1.setObjectName("widget1")
        self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.widget1)
        self.verticalLayout_2.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout_2.setObjectName("verticalLayout_2")
        self.lineEdit = QtWidgets.QLineEdit(self.widget1)
        self.lineEdit.setObjectName("lineEdit")
        self.verticalLayout_2.addWidget(self.lineEdit)
        self.lineEdit_2 = QtWidgets.QLineEdit(self.widget1)
        self.lineEdit_2.setEchoMode(QtWidgets.QLineEdit.Password)
        self.lineEdit_2.setObjectName("lineEdit_2")
        self.verticalLayout_2.addWidget(self.lineEdit_2)
        MainWindow.setCentralWidget(self.centralwidget)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton.setText(_translate("MainWindow", "登录"))
        self.pushButton.setShortcut(_translate("MainWindow", "Return")) # 设置快捷键
        self.label.setText(_translate("MainWindow", "账号："))
        self.label_2.setText(_translate("MainWindow", "密码："))

2、设计逻辑代码，实现登录界面跳转

这里登录后，我们转到另外一个窗口。这里我们结合以下文章实现界面跳转：Pyqt5打开电脑摄像头进行拍照_清纯世纪的博客-CSDN博客。

逻辑代码如下：（文件名为Login_mian.py）

from Login import Ui_MainWindow
from Camera_main import *

class login_window(QtWidgets.QMainWindow, Ui_MainWindow):
    def __init__(self):
        super(login_window, self).__init__()
        self.setupUi(self)  # 创建窗体对象
        self.init()
        self.admin = "123456"
        self.Password = "123456"

    def init(self):
        self.pushButton.clicked.connect(self.login_button)  # 连接槽

    def login_button(self):
        if self.lineEdit.text() == "":
            QMessageBox.warning(self, '警告', '账号不能为空，请输入！')
            return None

        if self.lineEdit_2.text() == "":
            QMessageBox.warning(self, '警告', '密码不能为空，请输入！')
            return None

        if (self.lineEdit.text() == self.admin) and self.lineEdit_2.text() == self.Password:
            # 1打开新窗口
            Ui_Main.show()
            # 2关闭本窗口
            self.close()
        else:
            QMessageBox.critical(self, '错误', '账号或密码错误！')
            self.lineEdit.clear()
            return None

if __name__ == '__main__':
    from PyQt5 import QtCore
    QtCore.QCoreApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling)  # 自适应分辨率
    app = QtWidgets.QApplication(sys.argv)
    window = login_window()
    Ui_Main = Open_Camera()  # 生成主窗口的实例
    window.show()
    sys.exit(app.exec_())

3、结果

注意：两个界面的函数不能一样，因为一般没有更改的用PyUIC直接生成的.py文件的函数名是一样的，要进行更改。

参考：暂未成功人士