PyQt5基础 QCheckBox 开启半选中状态UI界面文件结构代码效果学习推荐 QT PyQ

Python : 3.8.13

OS : Windows 21H1

Conda : 4.12.0

PyCharm : 2022.1 (Community Edition)

UI界面

文件结构

C:\Users\admin\PycharmProjects\pythonProject1>tree /F
文件夹 PATH 列表
卷序列号为 B0D5-61C1
C:.
│  demo.py
│  main.py
│  untitled.py
│  untitled.ui
│
├─.idea
│  │  .gitignore
│  │  misc.xml
│  │  modules.xml
│  │  pythonProject1.iml
│  │  workspace.xml
│  │
│  └─inspectionProfiles
│          profiles_settings.xml
│
└─__pycache__
        untitled.cpython-38.pyc

代码

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

# Form implementation generated from reading ui file '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_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(530, 497)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.checkBox = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox.setGeometry(QtCore.QRect(200, 170, 71, 16))
        self.checkBox.setObjectName("checkBox")
        self.checkBox_2 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_2.setGeometry(QtCore.QRect(200, 200, 71, 16))

        # 提供半选中状态
        self.checkBox_2.setTristate(True)

        self.checkBox_2.setObjectName("checkBox_2")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 530, 23))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

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

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.checkBox.setText(_translate("MainWindow", "CheckBox"))
        self.checkBox_2.setText(_translate("MainWindow", "CheckBox"))

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow

import untitled


def show_checkbox_info(checkBox):
    # 选中 2 True
    # 半选中 1 True
    # 未选中 0 False
    print(checkBox.objectName(), checkBox.checkState(), checkBox.isChecked())


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

    window = QMainWindow()

    ui = untitled.Ui_MainWindow()
    ui.setupUi(window)

    ui.checkBox.stateChanged.connect(lambda: show_checkbox_info(ui.checkBox))
    ui.checkBox_2.stateChanged.connect(lambda: show_checkbox_info(ui.checkBox_2))

    window.show()

    sys.exit(app.exec_())

效果

D:\Develop\Anaconda3\envs\pyqtenv\python.exe C:/Users/admin/PycharmProjects/pythonProject1/main.py
checkBox 2 True
checkBox_2 1 True
checkBox 0 False

Process finished with exit code 0

学习推荐

Python具有开源、跨平台、解释型和交互式等特性，值得学习。
Python的设计哲学：优雅，明确，简单。提倡用一种方法，最好是只有一种方法来做一件事。
GUI可以选择Tkinter、PySide2、wxPython、PyGObject、wxWidgets等进行创作。
代码的书写要遵守规范，这样有助于沟通和理解。
每种语言都有独特的思想，初学者需要转变思维、踏实践行、坚持积累。