有没有一种方法可以在程序开始时显示PyQt5 QMessageBox而不进行交互？

Question

我正在制作一个应用程序，我需要在启动时向用户显示一条弹出消息，告诉他们该程序的说明。有没有办法使弹出框显示在程序的开头？我已经准备好消息框功能，我只需要一种在开头显示它的方法

在来这里提问之前，我做了所有可能的研究，但是我找不到任何关于该主题的信息。我在Windows 10上使用Python 3.7和PyQt5 5.13.0

class Ui_AutoClicker(object):
    def setupUi(self, AutoClicker):
        AutoClicker.setObjectName("AutoClicker")
        AutoClicker.resize(586, 182)
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap("icon.ico"),
                       QtGui.QIcon.Normal, QtGui.QIcon.Off)
        AutoClicker.setWindowIcon(icon)
        self.centralwidget = QtWidgets.QWidget(AutoClicker)
        self.centralwidget.setObjectName("centralwidget")
        self.push_start_end = QtWidgets.QPushButton(self.centralwidget)
        self.push_start_end.setGeometry(QtCore.QRect(10, 120, 161, 51))
        font = QtGui.QFont()
        font.setPointSize(11)
        self.push_start_end.setFont(font)
        self.push_start_end.setObjectName("push_start_end")
        self.label_delay = QtWidgets.QLabel(self.centralwidget)
        self.label_delay.setGeometry(QtCore.QRect(10, 0, 191, 41))
        font = QtGui.QFont()
        font.setPointSize(12)
        self.label_delay.setFont(font)
        self.label_delay.setObjectName("label_delay")
        self.input_delay = QtWidgets.QLineEdit(self.centralwidget)
        self.input_delay.setGeometry(QtCore.QRect(10, 50, 291, 61))
        font = QtGui.QFont()
        font.setPointSize(12)
        self.input_delay.setFont(font)
        self.input_delay.setText("")
        self.input_delay.setObjectName("input_delay")
        self.label_click_count = QtWidgets.QLabel(self.centralwidget)
        self.label_click_count.setGeometry(QtCore.QRect(320, 0, 261, 41))
        font = QtGui.QFont()
        font.setPointSize(12)
        self.label_click_count.setFont(font)
        self.label_click_count.setObjectName("label_click_count")
        self.lcd_click_counter = QtWidgets.QLCDNumber(self.centralwidget)
        self.lcd_click_counter.setGeometry(QtCore.QRect(320, 50, 261, 121))
        self.lcd_click_counter.setProperty("intValue", 42069)
        self.lcd_click_counter.setObjectName("lcd_click_counter")
        self.lcd_click_counter.setProperty('digitCount', 10)
        self.line = QtWidgets.QFrame(self.centralwidget)
        self.line.setGeometry(QtCore.QRect(300, 0, 20, 251))
        self.line.setFrameShape(QtWidgets.QFrame.VLine)
        self.line.setFrameShadow(QtWidgets.QFrame.Sunken)
        self.line.setObjectName("line")
        self.push_close = QtWidgets.QPushButton(self.centralwidget)
        self.push_close.setGeometry(QtCore.QRect(180, 120, 121, 51))
        font = QtGui.QFont()
        font.setPointSize(11)
        self.push_close.setFont(font)
        self.push_close.setObjectName("push_close")
        AutoClicker.setCentralWidget(self.centralwidget)
        self.keyboard = KController()

        self.retranslateUi(AutoClicker)
        QtCore.QMetaObject.connectSlotsByName(AutoClicker)

        self.push_close.clicked.connect(self.close_app)
        self.push_close.clicked.connect(QCoreApplication.instance().quit)
        self.push_start_end.clicked.connect(self.start_clicker)
        self.lcd_click_counter.setProperty('intValue', 1)


    def retranslateUi(self, AutoClicker):
        _translate = QtCore.QCoreApplication.translate
        AutoClicker.setWindowTitle(_translate("AutoClicker", "Auto Clicker"))
        self.push_start_end.setText(
            _translate("AutoClicker", "Start/Stop (F4)"))
        self.label_delay.setText(_translate("AutoClicker", "Delay in 
             seconds"))
        self.label_click_count.setText(_translate(
            "AutoClicker", "Number of clicks clicked"))
        self.push_close.setText(_translate("AutoClicker", "Close (F6)"))

    def show_initial_message(self):
        msg = QMessageBox()
        msg.setWindowTitle('Initial information')
        msg.setText("Please use the 'Close (F6)' button to close the program."
                    "Closing it by pressing the red X button on the top will "
                    "leave the "
                    "autoclicker running until the key 'F6' is pressed.")
        msg.setIcon(QMessageBox.Information)
        msg.setStandardButtons(QMessageBox.Ok)
        x = msg.exec_()

Answer 1

如果要在显示主窗口之前先显示它，则将其放在类外的函数中，并在创建主窗口并显示它之前运行它。

from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QMessageBox

# --- classes ---

class MyApp(QWidget):
    pass

# --- functions ---

def show_message():
    msg = QMessageBox()
    msg.setWindowTitle('Initial information')
    msg.setText("Please use the 'Close (F6)' button to close the program.\n\n"
                "Closing it by pressing the red X button on the top will "
                "leave the autoclicker running until the key 'F6' is pressed.")
    msg.setIcon(QMessageBox.Information)
    msg.setStandardButtons(QMessageBox.Ok)
    msg.exec()

# --- main ---

app = QApplication([])

show_message()

my_app = MyApp()
my_app.show()

app.exec()

最终在__init__之前的self.show()中运行它

---

如果要在显示主窗口后显示它，请在__init__之后在self.show()中运行它

from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QMessageBox

# --- classes ---

class MyApp(QWidget):

    def __init__(self):
        super().__init__()

        self.show()
        self.show_message()

    def show_message(self):
        msg = QMessageBox()
        msg.setWindowTitle('Initial information')
        msg.setText("Please use the 'Close (F6)' button to close the program.\n\n"
                    "Closing it by pressing the red X button on the top will "
                    "leave the autoclicker running until the key 'F6' is pressed.")
        msg.setIcon(QMessageBox.Information)
        msg.setStandardButtons(QMessageBox.Ok)
        msg.exec()

# --- functions ---

# --- main ---

app = QApplication([])

my_app = MyApp()

app.exec()

---

如果要延迟显示，则可以使用QTimer。

from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QMessageBox
from PyQt5.QtCore import QTimer

# --- classes ---

class MyApp(QWidget):
    def __init__(self):
        super().__init__()

        self.show()

        timer = QTimer(self)
        timer.timeout.connect(self.show_message)
        timer.setSingleShot(True)
        timer.start(3000) # 3s

    def show_message(self):
        msg = QMessageBox()
        msg.setWindowTitle('Initial information')
        msg.setText("Please use the 'Close (F6)' button to close the program.\n\n"
                    "Closing it by pressing the red X button on the top will "
                    "leave the autoclicker running until the key 'F6' is pressed.")
        msg.setIcon(QMessageBox.Information)
        msg.setStandardButtons(QMessageBox.Ok)
        msg.exec()

# --- main ---

app = QApplication([])

my_app = MyApp()

app.exec()

Answer 2

尝试：

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_AutoClicker(object):
    def setupUi(self, AutoClicker):
        AutoClicker.setObjectName("AutoClicker")
        AutoClicker.resize(586, 182)
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap("icon.ico"),
                       QtGui.QIcon.Normal, QtGui.QIcon.Off)
        AutoClicker.setWindowIcon(icon)
        self.centralwidget = QtWidgets.QWidget(AutoClicker)
        self.centralwidget.setObjectName("centralwidget")
        self.push_start_end = QtWidgets.QPushButton(self.centralwidget)
        self.push_start_end.setGeometry(QtCore.QRect(10, 120, 161, 51))
        font = QtGui.QFont()
        font.setPointSize(11)
        self.push_start_end.setFont(font)
        self.push_start_end.setObjectName("push_start_end")
        self.label_delay = QtWidgets.QLabel(self.centralwidget)
        self.label_delay.setGeometry(QtCore.QRect(10, 0, 191, 41))
        font = QtGui.QFont()
        font.setPointSize(12)
        self.label_delay.setFont(font)
        self.label_delay.setObjectName("label_delay")
        self.input_delay = QtWidgets.QLineEdit(self.centralwidget)
        self.input_delay.setGeometry(QtCore.QRect(10, 50, 291, 61))
        font = QtGui.QFont()
        font.setPointSize(12)
        self.input_delay.setFont(font)
        self.input_delay.setText("")
        self.input_delay.setObjectName("input_delay")
        self.label_click_count = QtWidgets.QLabel(self.centralwidget)
        self.label_click_count.setGeometry(QtCore.QRect(320, 0, 261, 41))
        font = QtGui.QFont()
        font.setPointSize(12)
        self.label_click_count.setFont(font)
        self.label_click_count.setObjectName("label_click_count")
        self.lcd_click_counter = QtWidgets.QLCDNumber(self.centralwidget)
        self.lcd_click_counter.setGeometry(QtCore.QRect(320, 50, 261, 121))
        self.lcd_click_counter.setProperty("intValue", 42069)
        self.lcd_click_counter.setObjectName("lcd_click_counter")
        self.lcd_click_counter.setProperty('digitCount', 10)
        self.line = QtWidgets.QFrame(self.centralwidget)
        self.line.setGeometry(QtCore.QRect(300, 0, 20, 251))
        self.line.setFrameShape(QtWidgets.QFrame.VLine)
        self.line.setFrameShadow(QtWidgets.QFrame.Sunken)
        self.line.setObjectName("line")
        self.push_close = QtWidgets.QPushButton(self.centralwidget)
        self.push_close.setGeometry(QtCore.QRect(180, 120, 121, 51))
        font = QtGui.QFont()
        font.setPointSize(11)
        self.push_close.setFont(font)
        self.push_close.setObjectName("push_close")
        AutoClicker.setCentralWidget(self.centralwidget)
# ? KController        self.keyboard = KController()

        self.retranslateUi(AutoClicker)
        QtCore.QMetaObject.connectSlotsByName(AutoClicker)

# ? close_app       self.push_close.clicked.connect(self.close_app)
        self.push_close.clicked.connect(QtCore.QCoreApplication.instance().quit)  # QtCore.
# ? start_clicker       self.push_start_end.clicked.connect(self.start_clicker)
        self.lcd_click_counter.setProperty('intValue', 1)


    def retranslateUi(self, AutoClicker):
        _translate = QtCore.QCoreApplication.translate
        AutoClicker.setWindowTitle(_translate("AutoClicker", "Auto Clicker"))
        self.push_start_end.setText(
            _translate("AutoClicker", "Start/Stop (F4)"))
        self.label_delay.setText(_translate("AutoClicker", "Delay in seconds"))
        self.label_click_count.setText(_translate(
            "AutoClicker", "Number of clicks clicked"))
        self.push_close.setText(_translate("AutoClicker", "Close (F6)"))

    def show_initial_message(self):
        msg = QtWidgets.QMessageBox()
        msg.setWindowTitle('Initial information')
        msg.setText("Please use the 'Close (F6)' button to close the program."
                    "Closing it by pressing the red X button on the top will "
                    "leave the "
                    "autoclicker running until the key 'F6' is pressed.")
        msg.setIcon(QtWidgets.QMessageBox.Information)
        msg.setStandardButtons(QtWidgets.QMessageBox.Ok)
        x = msg.exec_()



class Window(QtWidgets.QMainWindow, Ui_AutoClicker):
    def __init__(self):
        super().__init__()
        self.setupUi(self)


if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication([])
    application = Window()

    application.show_initial_message()                             # +++

    application.show()
    sys.exit(app.exec_())