PyQt5基础 QDesktopWidget 窗口在屏幕上居中显示UI界面文件结构代码效果学习推

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(623, 497)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 623, 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"))

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow

# The QDesktopWidget class provides access to screen information on multi-head systems
from PyQt5.QtWidgets import QDesktopWidget

import untitled

app = QApplication(sys.argv)

window = QMainWindow()

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

# 屏幕
#Returns the geometry of the screen with index screen. The default screen is used if screen is -1.
screen_geometry = QDesktopWidget().screenGeometry()
# qt窗口
window_geometry = window.geometry()

print(screen_geometry)
print(window_geometry)

print((screen_geometry.width() - window_geometry.width()) / 2)

# 先移走
window.move(100,100)

# 再移动到居中
# 如果没有int()的话，会警告
# DeprecationWarning: an integer is required (got type float).
# Implicit conversion to integers using __int__ is deprecated,
# and may be removed in a future version of Python.
# window.move((screen_size.width() - window_size.width()) / 2,
window.move(int((screen_geometry.width() - window_geometry.width()) / 2),
            int((screen_geometry.height() - window_geometry.height()) / 2))

# 截图工具自带像素测量功能，可以量一量
window.show()

sys.exit(app.exec_())

效果

D:\Develop\Anaconda3\envs\pyqtenv\python.exe C:/Users/admin/PycharmProjects/pythonProject1/main.py
PyQt5.QtCore.QRect(0, 0, 1920, 1080)
PyQt5.QtCore.QRect(0, 0, 623, 497)
648.5

Process finished with exit code 0

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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。
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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。