python Qt Designer 窗口与实际python代码运行窗口不一致

python Qt Designer 窗口与实际python代码运行窗口不一致

Qt Designer编辑窗口

在Qt Designer中拖入一个Scroll Area, 按Ctrl+R可以预览窗口

按Ctrl+R预览

python代码

使用pyuic生成python代码

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

# Form implementation generated from reading ui file 'KarcherMain.ui'
#
# Created by: PyQt5 UI code generator 5.15.0
#
# 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(876, 493)
        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, 876, 22))
        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"))

添加main.py

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

import KarcherMain

if __name__ == '__main__':
    # QtCore.QCoreApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling)
    app = QApplication(sys.argv)
    MainWindow = QMainWindow()
    ui = KarcherMain.Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

运行main.py， 显示的窗口与Qt Designer中预览的尺寸不一致

解决办法

在main.py代码前加一行

QtCore.QCoreApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling)

如：

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

import KarcherMain

if __name__ == '__main__':
    # QtCore.QCoreApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling)
    app = QApplication(sys.argv)
    MainWindow = QMainWindow()
    ui = KarcherMain.Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

运行main.py, 可以看到窗口和Qt Designer预览的一致。 Scroll Aream中没有组件和颜色， 未显示