初写pyqt5

 主要功能为实现注册、登录界面的切换以及整体窗口的拖动

学习链接：Python/PyQt5/Qtdesigner设计登录界面___拖动和关闭_哔哩哔哩_bilibili

Python/PyQt5/Qtdesigner设计登录界面——包括登录和注册界面切换_哔哩哔哩_bilibili

附下方代码链接： https://pan.baidu.com/s/1Ax4riQJ2C5F-V_usfVFyqg

提取码: zz11 

# @Author  :zwx
# @time    :2022/7/18 下午4:38
# @file    :main.py

import login
import sys
from PyQt5 import QtCore, QtGui
from PyQt5.QtWidgets import QApplication, QMainWindow

class LoginWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.ui = login.Ui_MainWindow()
        self.ui.setupUi(self)
        self.ui.widget_3.hide()
        self.ui.pushButton.clicked.connect(self.change_widget2)  # 信号与槽的绑定  connect绑定事件时，需要注意添加self.xxx(事件名)
        self.ui.pushButton_2.clicked.connect(self.change_widget3)

    def change_widget3(self):    # 定义 点击切换登录--->注册事件
        self.ui.widget_2.hide()
        self.ui.widget_3.show()

    def change_widget2(self):    # 定义 点击切换注册--->登录事件
        self.ui.widget_3.hide()
        self.ui.widget_2.show()

    def mousePressEvent(self, event):
        if event.button() == QtCore.Qt.LeftButton and self.isMaximized() == False:
            self.m_flag = True
            self.m_Position = event.globalPos() - self.pos()  # 获取鼠标相对窗口的位置
            event.accept()
            self.setCursor(QtGui.QCursor(QtCore.Qt.OpenHandCursor))  # 更改鼠标图标

    def mouseMoveEvent(self, mouse_event):
        if QtCore.Qt.LeftButton and self.m_flag:
            self.move(mouse_event.globalPos() - self.m_Position)  # 更改窗口位置
            mouse_event.accept()

    def mouseReleaseEvent(self, mouse_event):
        self.m_flag = False
        self.setCursor(QtGui.QCursor(QtCore.Qt.ArrowCursor))

if __name__ == '__main__':
    app = QApplication(sys.argv)
    win = LoginWindow()
    # loginUi = login.Ui_MainWindow()
    # loginUi.setupUi(win)
    # loginUi.widget_3.hide()

    # def change_widget3():
    #     loginUi.widget_2.hide()
    #     loginUi.widget_3.show()
    #
    # def change_widget2():
    #     loginUi.widget_3.hide()
    #     loginUi.widget_2.show()

    # 实现窗口拖动
    # def mousePressEvent(self, event):
    #     if event.button() == QtCore.Qt.LeftButton and self.isMaximized() == False:
    #         self.m_flag = True
    #         self.m_Position = event.globalPos() - self.pos()  # 获取鼠标相对窗口的位置
    #         event.accept()
    #         self.setCursor(QtGui.QCursor(QtCore.Qt.OpenHandCursor))  # 更改鼠标图标
    #
    #
    # def mouseMoveEvent(self, mouse_event):
    #     if QtCore.Qt.LeftButton and self.m_flag:
    #         self.move(mouse_event.globalPos() - self.m_Position)  # 更改窗口位置
    #         mouse_event.accept()
    #
    #
    # def mouseReleaseEvent(self, mouse_event):
    #     self.m_flag = False
    #     self.setCursor(QtGui.QCursor(QtCore.Qt.ArrowCursor))

    # loginUi.pushButton.clicked.connect(change_widget2)  # 信号与槽的绑定change_widget2
    # loginUi.pushButton_2.clicked.connect(change_widget3)
    win.show()
    sys.exit(app.exec_())