Pyqt5 编写登录窗口

第一步：使用Qt designer创建Qwidget，并设置windowTitle和windowIcon

第二步：编译ui文件转换成py文件，此操作是在vscode里配置了pyuic和Qt designer，所以可以直接右键创建Ui和编译UI文件，编译后的UI文件为Ui_untitled.py

代码如下：

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

# Form implementation generated from reading ui file 'e:\daizuo\untitled.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_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(400, 300)
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap("C:/Qt/images/close.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        Form.setWindowIcon(icon)
        self.pushButton = QtWidgets.QPushButton(Form)
        self.pushButton.setGeometry(QtCore.QRect(100, 180, 75, 23))
        self.pushButton.setObjectName("pushButton")
        self.pushButton_2 = QtWidgets.QPushButton(Form)
        self.pushButton_2.setGeometry(QtCore.QRect(190, 180, 75, 23))
        self.pushButton_2.setObjectName("pushButton_2")
        self.lineEdit = QtWidgets.QLineEdit(Form)
        self.lineEdit.setGeometry(QtCore.QRect(150, 90, 113, 20))
        self.lineEdit.setObjectName("lineEdit")
        self.lineEdit_2 = QtWidgets.QLineEdit(Form)
        self.lineEdit_2.setGeometry(QtCore.QRect(150, 130, 113, 20))
        self.lineEdit_2.setObjectName("lineEdit_2")
        self.label = QtWidgets.QLabel(Form)
        self.label.setGeometry(QtCore.QRect(100, 90, 41, 20))
        self.label.setObjectName("label")
        self.label_2 = QtWidgets.QLabel(Form)
        self.label_2.setGeometry(QtCore.QRect(100, 130, 41, 16))
        self.label_2.setObjectName("label_2")

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

    def retranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form", "登录"))
        self.pushButton.setText(_translate("Form", "登录"))
        self.pushButton_2.setText(_translate("Form", "注册"))
        self.label.setText(_translate("Form", "用户名"))
        self.label_2.setText(_translate("Form", "密  码"))

第三步：创建主程序文件，在主程序入口文件里引入第二步编译生成的py文件。代码如下

from PyQt5.QtWidgets import QApplication, QMainWindow

from Ui_untitled  import *
import sys
class MyMainForm(QMainWindow, Ui_Form):
    def __init__(self, parent=None):
        super(MyMainForm, self).__init__(parent)
        self.setupUi(self)

    
        palette = QtGui.QPalette()
        palette.setBrush(QtGui.QPalette.Background, QtGui.QBrush(QtGui.QPixmap("E:/daizuo/img.png"))) 
        self.setPalette(palette)
   

if __name__ == "__main__":
    app = QApplication(sys.argv)
    myWin = MyMainForm()
    myWin.show()
    sys.exit(app.exec_())

第四步：编译运行该文件，画面略丑，不过整体思路就是这样，可以单独创建qss文件，对界面进一步优化