Pyqt 5新窗口崩溃主窗口

Question

我有一个MainWindow，我想打开一个新窗口。

新窗口：

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

# Form implementation generated from reading ui file 'C:\Users\Tareq\Desktop\table.ui' 
# 
# Created by: PyQt5 UI code generator 5.6 
# 
# 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(703, 449) 
     self.centralwidget = QtWidgets.QWidget(MainWindow) 
     self.centralwidget.setObjectName("centralwidget") 
     self.tableWidget = QtWidgets.QTableWidget(self.centralwidget) 
     self.tableWidget.setGeometry(QtCore.QRect(0, 0, 701, 401)) 
     self.tableWidget.setRowCount(48) 
     self.tableWidget.setColumnCount(4) 
     self.tableWidget.setObjectName("tableWidget") 
     MainWindow.setCentralWidget(self.centralwidget) 
     self.menubar = QtWidgets.QMenuBar(MainWindow) 
     self.menubar.setGeometry(QtCore.QRect(0, 0, 703, 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")) 


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_()) 

我加入到我的主窗口下面的说明

self.pushButton_2.clicked.connect(self.create_new_window) 

及以下功能：

def create_new_window(self): 
    from tableWindow import Ui_MainWindow 
    self.tableWindow = Ui_MainWindow 
    self.tableWinow.show() 

但按下按钮2后PROGRAMM没有崩溃给定错误...

个

过程完成，退出代码为1

Answer 1

由于eyllanesc说，这可能是因为你还没有使用它之前进口的QMainWindow。然而，即使这样，你觉得你正在做太多的事来创建你自己的窗口子类化“对象”。这将是更容易（更Pythonic？）子类化QMainWindow，并让它做繁重的工作。

试试这个小例子：

import sys 
from PyQt5 import QtCore, QtWidgets 
from PyQt5.QtWidgets import * 

class Second(QtWidgets.QMainWindow): 
    def __init__(self, parent=None): 
     super(Second, self).__init__(parent) 
     #Setting a title, locating and sizing the window 
     self.title = 'My Second Window' 
     self.left = 200 
     self.top = 200 
     self.width = 500 
     self.height = 500 
     self.setWindowTitle(self.title) 
     self.setGeometry(self.left, self.top, self.width, self.height) 
     self.pushButton = QtWidgets.QPushButton("Close Me", self) 
     self.pushButton.clicked.connect(self.on_pushButton_clicked) 
     self.pushButton.move(120,120) 

    def on_pushButton_clicked(self): 
     self.close() 

class First(QtWidgets.QMainWindow): 
    def __init__(self, parent=None): 
     super(First, self).__init__(parent) 
     self.title = 'My First Window' 
     self.left = 100 
     self.top = 100 
     self.width = 500 
     self.height = 500 
     self.setWindowTitle(self.title) 
     self.setGeometry(self.left, self.top, self.width, self.height) 
     self.pushButton = QtWidgets.QPushButton("Open Me", self) 
     self.pushButton.move(120,120) 
     self.pushButton.clicked.connect(self.on_pushButton_clicked)  
     self.newWindow = Second(self) 

    def on_pushButton_clicked(self): 
     self.newWindow.show() 

app = QtWidgets.QApplication(sys.argv) 
main = First() 
main.show() 
sys.exit(app.exec_()) 

它只是打开从另一个与一个按钮一个窗口。