以下Python程序在运行时(无论是在PyCharm中还是通过在Windows资源管理器中双击.py来运行)在显示窗口的[[contents之前都有明显的延迟(有时为5s)。 (主窗口本身在运行时显示)
import os
from PyQt5 import QtCore, QtGui, QtWidgets, uic
class MyWindow(QtWidgets.QMainWindow):
i = 0#global variable
def __init__(self):
super(MyWindow, self).__init__()
uic.loadUi('hello_world.ui', self)
self.pushButton.clicked.connect(self.onButtonClicked)
def onButtonClicked(self):
self.i+=1
print('hello world! ' + str(self.i))
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
window = MyWindow()
window.show()
sys.exit(app.exec_())
UI文件使用QtDesigner作为.ui文件保存在与.py脚本相同的目录中UPDATE
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'hello_world.ui'
#
# Created by: PyQt5 UI code generator 5.13.2
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 500)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(140, 80, 186, 41))
self.pushButton.setStyleSheet("QPushButton {\n"
" background-color: red;\n"
" border-style: outset;\n"
" border-width: 2px;\n"
" border-radius: 10px;\n"
" border-color: beige;\n"
" font: bold 14px;\n"
" min-width: 10em;\n"
" padding: 6px;\n"
"}\n"
"QPushButton:pressed {\n"
" background-color: rgb(224, 0, 0);\n"
" border-style: inset;\n"
"}")
self.pushButton.setObjectName("pushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
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.pushButton.setText(_translate("MainWindow", "PushButton"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
以上更新是使用pyuic直接生成的代码。但它仍然显示出明显的延迟。 (首先,主窗口显示标题栏,其内容应为全白色。大约一秒钟后,内容将被加载)
我将使用pyuic命令将文件首先转换为.py格式,然后导入并尝试运行它。