使用 QTdesigner 创建的 PyQt5 程序从终端打开时不显示任何窗口

PyQt5 program created with QTdesigner doesnt show any window when opened from terminal(使用 QTdesigner 创建的 PyQt5 程序从终端打开时不显示任何窗口)

问题描述

我正在使用 QT Designer 没有任何问题，但是今天我开始了全新的 ubuntu 18.04 安装，但是这次当我从终端运行 PyQt5 程序时，它们没有显示任何窗口，从 atom-runner 运行时出现同样的问题(它没有甚至显示任何错误)

I was working with QT Designer with no issues but today i started a fresh ubuntu 18.04 install, but this time when i run the PyQt5 programs from terminal they doesnt show any windows, same issue when running from atom-runner (It doesnt even show any error)

我将 .ui 文件从 Qt Designer 保存后直接使用 pyuic5 导出为 .py，尝试了一个简单的空白窗口和同样的问题

I exported the .ui files into .py using pyuic5 directly after saving them from Qt Designer, tried a simple blank window and same problem

知道如何解决这个问题吗?

Any idea how can i fix this?

这是一个代码示例，一个应该显示但由于某种原因它不会显示的简单窗口

This is an example of the code, a simple window that should show but for some reason it wont

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

# Form implementation generated from reading ui file 'label.ui'
#
# Created by: PyQt5 UI code generator 5.11.3
#
# 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(315, 142)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(20, 20, 371, 111))
        font = QtGui.QFont()
        font.setPointSize(45)
        self.label.setFont(font)
        self.label.setObjectName("label")
        MainWindow.setCentralWidget(self.centralwidget)
        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.label.setText(_translate("MainWindow", "DA LABEL"))

推荐答案

要生成可以使用 pyuic 显示窗口的代码，您必须使用 -x 选项:

To generate a code that can show a window using pyuic you must use the -x option:

pyuic5 input.ui -o output.py -x

使用 -x 的上一条命令将以下代码添加到文件末尾:

The previous command using the -x adds the following code to the end of the file:

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_())

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