如何从PyQt5的弹出窗口中隐藏主窗口（父窗口）？

Question

我有一个主窗口，我从那里叫豁免窗口（弹出窗口）。在“放弃”弹出窗口上单击“确定”后，我要关闭“放弃”弹出窗口并隐藏主窗口。我将self.parent（）。hide包含在豁免弹出窗口中，但其抛出错误“进程以退出代码1073741845完成”。弹出窗口关闭，主窗口突然终止。

waiver_window.py

from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import Qt, QSize, QRect


class popup_on_waiver(QMainWindow):

    def __init__(self):
        QMainWindow.__init__(self)
        self.setWindowFlags(Qt.WindowStaysOnTopHint | Qt.CustomizeWindowHint)
        self.setMinimumSize(QSize(660, 340))
        self.setWindowTitle("Waiver")

        vbox = QVBoxLayout()

        centralWidget = QWidget(self)
        self.setCentralWidget(centralWidget)
        self.cb = QComboBox(centralWidget)
        self.cb.setGeometry(QRect(40, 40, 100, 30))
        self.cb.addItem("1")
        self.cb.addItem("2")
        self.cb.addItem("3")
        self.cb.addItem("4")
        self.cb.setObjectName("combobox")
        self.cb.move(80, 80)

        self.OK = QPushButton('OK',self)
        self.OK.setStyleSheet('QPushButton {font-size: 14px; font: Bold; font-family: Verdana; background-color: Orange; color: White}')
        self.OK.move(400,280)

        self.Cancel = QPushButton('Cancel', self)
        self.Cancel.setStyleSheet('QPushButton {font-size: 14px; font: Bold; font-family: Verdana; background-color: Orange; color: White}')
        self.Cancel.move(520, 280)

        vbox.addWidget(self.cb)
        vbox.addWidget(self.OK)
        vbox.addWidget(self.Cancel)

        self.setLayout(vbox)

        self.OK.clicked.connect(self.hide_main)
        self.Cancel.clicked.connect(self.close)

        self.show()

    def hide_main(self):
        self.close
        self.parent().hide()

    def waiverClicked(self):
        self.p = popup_on_waiver()

---

main.py

from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import QUrl, Qt, QTimer
from gui_package.waiver_window import popup_on_waiver
import sys

class Main(QMainWindow):

    def __init__(self):
        QMainWindow.__init__(self)
        self.setWindowFlags(Qt.WindowStaysOnTopHint)
        self.initUI()

    def initUI(self):
        self.centralwidget = QWidget(self)
        hbox = QHBoxLayout()
        self.Waiver = QPushButton('Waiver', self)
        self.Waiver.clicked.connect(lambda: popup_on_waiver.waiverClicked(self))
        hbox.addWidget(self.Waiver)
        self.centralwidget.setLayout(hbox)
        self.setGeometry(50, 50, 1200, 600)
        self.setWindowTitle("Timesheet")
        self.setWindowIcon(QIcon(""))
        self.setStyleSheet("background-color:")
        self.setCentralWidget(self.centralwidget)
        self.show()

Answer 1

您没有与父对象一起创建弹出窗口，因此self.parent()返回None，然后您尝试在不存在的对象上调用hide()。调用弹出窗口的方式有点奇怪，在该窗口中创建popup_on_waiver类在类本身内的实例。此外，使弹出窗口从QDialog继承而不是QMainWindow继承更有意义。现在，在Main类带有父级self中构造弹出窗口小部件，然后将豁免按钮连接到QDialog.exec_()方法：

popup = popup_on_waiver(self)
self.Waiver.clicked.connect(popup.exec_)

这里是已编辑的代码。

class popup_on_waiver(QDialog):

    def __init__(self, parent=None):
        super().__init__(parent)
        self.setMinimumSize(QSize(660, 340))
        self.setWindowTitle("Waiver")

        self.cb = QComboBox()
        self.cb.setGeometry(QRect(40, 40, 100, 30))
        self.cb.addItems(["1", "2", "3", "4"])
        self.cb.setObjectName("combobox")
        self.cb.move(80, 80)

        self.OK = QPushButton('OK')
        self.OK.setStyleSheet('QPushButton {font-size: 14px; font: Bold; font-family: Verdana; background-color: Orange; color: White}')
        self.OK.move(400, 280)

        self.Cancel = QPushButton('Cancel')
        self.Cancel.setStyleSheet('QPushButton {font-size: 14px; font: Bold; font-family: Verdana; background-color: Orange; color: White}')
        self.Cancel.move(520, 280)

        vbox = QVBoxLayout(self)
        vbox.addWidget(self.cb)
        vbox.addWidget(self.OK)
        vbox.addWidget(self.Cancel)

        self.OK.clicked.connect(self.hide_main)
        self.Cancel.clicked.connect(self.reject)

    def hide_main(self):
        self.accept()
        self.parent().hide()


class Main(QMainWindow):

    def __init__(self):
        super().__init__()
        self.setWindowFlags(Qt.WindowStaysOnTopHint)
        self.initUI()

    def initUI(self):
        self.centralwidget = QWidget(self)
        self.Waiver = QPushButton('Waiver')

        popup = popup_on_waiver(self)
        self.Waiver.clicked.connect(popup.exec_)

        hbox = QHBoxLayout()
        hbox.addWidget(self.Waiver)
        self.centralwidget.setLayout(hbox)
        self.setGeometry(50, 50, 1200, 600)
        self.setWindowTitle("Timesheet")
        self.setWindowIcon(QIcon(""))
        self.setStyleSheet("background-color:")
        self.setCentralWidget(self.centralwidget)
        self.show()