我试图在飞溅屏幕之后加载房屋屏幕

Question

飞溅屏幕之后，我试图装载房屋。运行代码后，SplashScreen设法加载，但停止了。我该如何解决？

这是我的SplashScreen类，

class SplashScreen(QWidget):
    def __init__(self):
        super().__init__()
        self.setFixedSize(700, 350)
        self.setWindowFlag(Qt.FramelessWindowHint)
        self.setAttribute(Qt.WA_TranslucentBackground)
        self.counter = 0
        self.n = 100
        self.initUI()
        self.timer = QTimer()
        self.timer.timeout.connect(self.loading)
        self.timer.start(30)

    def initUI(self):
        # layout to display splash scrren frame
        layout = QVBoxLayout()
        self.setLayout(layout)
        # splash screen frame
        self.frame = QFrame()
        layout.addWidget(self.frame)
        # splash screen title
        self.title_label = QLabel(self.frame)
        self.title_label.setObjectName('title_label')
        self.title_label.resize(690, 120)
        self.title_label.move(0, 5)  # x, y
        self.title_label.setText('Splash Screen')
        self.title_label.setAlignment(Qt.AlignCenter)
        # splash screen title description
        self.description_label = QLabel(self.frame)
        self.description_label.resize(690, 40)
        self.description_label.move(0, self.title_label.height())
        self.description_label.setObjectName('desc_label')
        self.description_label.setText('<b>Splash Screen PyQt-5</b>')
        self.description_label.setAlignment(Qt.AlignCenter)
        # splash screen pogressbar
        self.progressBar = QProgressBar(self.frame)
        self.progressBar.resize(self.width() - 200 - 10, 50)
        self.progressBar.move(100, 180)  # self.description_label.y()+130
        self.progressBar.setAlignment(Qt.AlignCenter)
        self.progressBar.setFormat('%p%')
        self.progressBar.setTextVisible(True)
        self.progressBar.setRange(0, self.n)
        self.progressBar.setValue(20)
        # spash screen loading label
        self.loading_label = QLabel(self.frame)
        self.loading_label.resize(self.width() - 10, 50)
        self.loading_label.move(0, self.progressBar.y() + 70)
        self.loading_label.setObjectName('loading_label')
        self.loading_label.setAlignment(Qt.AlignCenter)
        self.loading_label.setText('Loading...')

这是允许SplashScreen负载并启动Window App类但行不通的功能。我的意思是不起作用，我的意思是它不会加载窗口。它只是关闭。

    def loading(self):
        # set progressbar value
        self.progressBar.setValue(self.counter)
        # stop progress if counter
        # is greater than n and
        # display main window app
        if self.counter >= self.n:
            self.timer.stop()
            self.close()
            MainWindow = QtWidgets.QMainWindow()
            ui = WindowApp()
            ui.setupUi(MainWindow)
            MainWindow.show()

        self.counter += 1

这是我的主窗口，

class WindowApp(QMainWindow):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1006, 654)

        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")

        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(10, 10, 981, 641))
        font = QtGui.QFont()
        font.setFamily("Arial")
        font.setPointSize(10)
        self.label.setFont(font)
        self.label.setText("")
        self.label.setPixmap(QtGui.QPixmap("../pygui/Homescreen.png"))
        self.label.setScaledContents(True)
        self.label.setWordWrap(False)
        self.label.setObjectName("label")

        self.infoBtn = QtWidgets.QPushButton(self.centralwidget)
        self.infoBtn.setGeometry(QtCore.QRect(120, 550, 181, 41))
        font = QtGui.QFont()
        font.setFamily("Arial")
        font.setPointSize(15)
        self.infoBtn.setFont(font)
        self.infoBtn.setStyleSheet("border-radius: 10px;\n"
                                   "border-color: 2px solid gray;\n"
                                   "background-color: rgb(255, 255, 255);")
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap("icons/info_icon.png"),
                       QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.infoBtn.setIcon(icon)
        self.infoBtn.setObjectName("infoBtn")

        self.startBtn = QtWidgets.QPushButton(self.centralwidget)
        self.startBtn.setGeometry(QtCore.QRect(310, 270, 431, 111))
        font = QtGui.QFont()
        font.setFamily("Arial")
        font.setPointSize(28)
        self.startBtn.setFont(font)
        self.startBtn.setStyleSheet("background-color: #305E6C;\n"
                                    "color: white;\n"
                                    "border-radius: 10px;\n"
                                    "border: 2px solid white")
        self.startBtn.setObjectName("startBtn")

        self.contactsBtn = QtWidgets.QPushButton(self.centralwidget)
        self.contactsBtn.setGeometry(QtCore.QRect(720, 30, 101, 101))
        self.contactsBtn.setStyleSheet("\n"
                                       "background-color: #121212;\n"
                                       "border-radius: 50%;\n"
                                       "border: 2px solid white;")
        self.contactsBtn.setText("")
        icon1 = QtGui.QIcon()
        icon1.addPixmap(QtGui.QPixmap("icons/typcn_contacts.png"),
                        QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.contactsBtn.setIcon(icon1)
        self.contactsBtn.setIconSize(QtCore.QSize(40, 40))
        self.contactsBtn.setObjectName("contactsBtn")

        self.dateBtn = QtWidgets.QPushButton(self.centralwidget)
        self.dateBtn.setGeometry(QtCore.QRect(840, 30, 101, 101))
        self.dateBtn.setStyleSheet("\n"
                                   "background-color: #121212;\n"
                                   "border-radius: 50%;\n"
                                   "border: 2px solid white;")
        self.dateBtn.setText("")
        icon2 = QtGui.QIcon()
        icon2.addPixmap(QtGui.QPixmap("icons/Group.png"),
                        QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.dateBtn.setIcon(icon2)
        self.dateBtn.setIconSize(QtCore.QSize(40, 40))
        self.dateBtn.setObjectName("dateBtn")

        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 1006, 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)

        self.infoBtn.clicked.connect(partial(self.show_popup))
        self.dateBtn.clicked.connect(self.openDateWindow)
        self.startBtn.clicked.connect(self.openDriveWindow)
        self.contactsBtn.clicked.connect(self.openContactWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.infoBtn.setText(_translate("MainWindow", "About"))
        self.startBtn.setText(_translate("MainWindow", "Driving Mode"))

    def show_popup(self):
        msg = QMessageBox()
        msg.setWindowTitle('About Us')
        msg.setText('Testing')
        msg.setIcon(QMessageBox.Information)
        x = msg.exec_()

    def openDateWindow(self, MainWindow):
        self.window = QtWidgets.QMainWindow()
        self.ui = Ui_DateWindow()
        self.ui.setupUi(self.window, MainWindow)
        self.window.show()
        MainWindow.hide()

    def openDriveWindow(self, MainWindow):
        self.window = QtWidgets.QMainWindow()
        self.ui = Ui_DriveWindow()
        self.ui.setupUi(self.window, MainWindow)
        self.window.show()
        MainWindow.hide()

    def openContactWindow(self, MainWindow):
        self.window = QtWidgets.QMainWindow()
        self.ui = Ui_ContactWindow()
        self.ui.setupUi(self.window, MainWindow)
        self.window.show()
        MainWindow.hide()

我尝试将其更改为windowapp（）只是为了检查MainWindow是否有任何问题，但它设法在没有Splashscreen的情况下加载。

app = QApplication(sys.argv)
splash = SplashScreen()
splash.show()

sys.exit(app.exec_())

Answer 1

从我认为会帮助您。
您可以显示飞溅屏幕，当启动屏幕关闭时，您可以显示主窗口。它类似于以前的问题的登录窗口

，但是如果您想按照自己的方式实现代码，我认为我知道这个问题。

您调用一个创建QMainWindow的方法，并为该QMainWindow调用.show（）。完成该方法后，该方法中的变量是收集垃圾的，您的QMainWindow对象也是如此。保持参考并防止这些变量收集垃圾的方法是，通过在变量的前面添加self。来使其成为类变量。

我可能会重组一些事情，然后做这样的事情：

if __name__ == "__main__":
    app            = QApplication(sys.argv)
    splash         = SplashScreen()
    splash_closed  = splash.exec_()

    if splash_closed:                             
        window = WindowApp()   
        window.show()
        sys.exit(app.exec_())

plashscreen现在是一个qdialog，当您完成加载后，您可以使用self.accept（）关闭对话框，而不是尝试显示一个新窗口：

class SplashScreen(QDialog):
    def __init__(self):
        super().__init__()
        self.setFixedSize(700, 350)
        self.setWindowFlag(Qt.FramelessWindowHint)
        self.setAttribute(Qt.WA_TranslucentBackground)
        self.counter = 0
        self.n = 100
        self.initUI()
        self.timer = QTimer()
        self.timer.timeout.connect(self.loading)
        self.timer.start(30)

    def initUI(self):
        ...

    def loading(self):
        # set progressbar value
        self.progressBar.setValue(self.counter)
        # stop progress if counter
        # is greater than n and
        # display main window app
        if self.counter >= self.n:
            self.timer.stop()
            self.accept()

        self.counter += 1

而且您也应该使用。主窗口上的__ Init __方法，也许在其中移动所有self.setupui代码，或者只是做这样的事情：

class WindowApp(QMainWindow):
    def __init__(self):
        QtWidgets.QDialog.__init__(self)                                                        
        self.setupUi(self)
    
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1006, 654)

        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")

Answer 2

希望这会有所帮助

import sys
from PyQt5.QtWidgets import QMainWindow, QDialog, QApplication
from PyQt5.QtWidgets import QPushButton, QVBoxLayout, QFrame, QLabel, QProgressBar
from PyQt5.QtWidgets import QWidget
from PyQt5 import QtCore, QtGui
from PyQt5 import QtWidgets
from PyQt5.QtCore import Qt, QTimer

class SplashScreen(QWidget):
    def __init__(self):
        super().__init__()
        self.setFixedSize(700, 350)
        self.setWindowFlag(Qt.FramelessWindowHint)
        self.setAttribute(Qt.WA_TranslucentBackground)
        self.counter = 0
        self.n = 100
        self.initUI()
        self.timer = QTimer()
        self.timer.timeout.connect(self.loading)
        self.timer.start(30)

    def initUI(self):
        # layout to display splash scrren frame
        layout = QVBoxLayout()
        self.setLayout(layout)
        # splash screen frame
        self.frame = QFrame()
        layout.addWidget(self.frame)
        # splash screen title
        self.title_label = QLabel(self.frame)
        self.title_label.setObjectName('title_label')
        self.title_label.resize(690, 120)
        self.title_label.move(0, 5)  # x, y
        self.title_label.setText('Splash Screen')
        self.title_label.setAlignment(Qt.AlignCenter)
        # splash screen title description
        self.description_label = QLabel(self.frame)
        self.description_label.resize(690, 40)
        self.description_label.move(0, self.title_label.height())
        self.description_label.setObjectName('desc_label')
        self.description_label.setText('<b>Splash Screen PyQt-5</b>')
        self.description_label.setAlignment(Qt.AlignCenter)
        # splash screen pogressbar
        self.progressBar = QProgressBar(self.frame)
        self.progressBar.resize(self.width() - 200 - 10, 50)
        self.progressBar.move(100, 180)  # self.description_label.y()+130
        self.progressBar.setAlignment(Qt.AlignCenter)
        self.progressBar.setFormat('%p%')
        self.progressBar.setTextVisible(True)
        self.progressBar.setRange(0, self.n)
        self.progressBar.setValue(20)
        # spash screen loading label
        self.loading_label = QLabel(self.frame)
        self.loading_label.resize(self.width() - 10, 50)
        self.loading_label.move(0, self.progressBar.y() + 70)
        self.loading_label.setObjectName('loading_label')
        self.loading_label.setAlignment(Qt.AlignCenter)
        self.loading_label.setText('Loading...')
        self.show()


    def loading(self):
        # set progressbar value
        self.progressBar.setValue(self.counter)
        # stop progress if counter
        # is greater than n and
        # display main window app
        if self.counter >= self.n:
            self.timer.stop()
            '''
            self.close()
            MainWindow = QtWidgets.QMainWindow()
            ui = WindowApp()
            ui.setupUi(MainWindow)
            MainWindow.show()
            '''
            self.ui = WindowApp()
            self.ui.show()
            self.close()

        self.counter += 1

class WindowApp(QMainWindow):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1006, 654)

        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")

        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(10, 10, 981, 641))
        font = QtGui.QFont()
        font.setFamily("Arial")
        font.setPointSize(10)
        self.label.setFont(font)
        self.label.setText("")
        self.label.setPixmap(QtGui.QPixmap("../pygui/Homescreen.png"))
        self.label.setScaledContents(True)
        self.label.setWordWrap(False)
        self.label.setObjectName("label")

        self.infoBtn = QtWidgets.QPushButton(self.centralwidget)
        self.infoBtn.setGeometry(QtCore.QRect(120, 550, 181, 41))
        font = QtGui.QFont()
        font.setFamily("Arial")
        font.setPointSize(15)
        self.infoBtn.setFont(font)
        self.infoBtn.setStyleSheet("border-radius: 10px;\n"
                                   "border-color: 2px solid gray;\n"
                                   "background-color: rgb(255, 255, 255);")
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap("icons/info_icon.png"),
                       QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.infoBtn.setIcon(icon)
        self.infoBtn.setObjectName("infoBtn")

        self.startBtn = QtWidgets.QPushButton(self.centralwidget)
        self.startBtn.setGeometry(QtCore.QRect(310, 270, 431, 111))
        font = QtGui.QFont()
        font.setFamily("Arial")
        font.setPointSize(28)
        self.startBtn.setFont(font)
        self.startBtn.setStyleSheet("background-color: #305E6C;\n"
                                    "color: white;\n"
                                    "border-radius: 10px;\n"
                                    "border: 2px solid white")
        self.startBtn.setObjectName("startBtn")

        self.contactsBtn = QtWidgets.QPushButton(self.centralwidget)
        self.contactsBtn.setGeometry(QtCore.QRect(720, 30, 101, 101))
        self.contactsBtn.setStyleSheet("\n"
                                       "background-color: #121212;\n"
                                       "border-radius: 50%;\n"
                                       "border: 2px solid white;")
        self.contactsBtn.setText("")
        icon1 = QtGui.QIcon()
        icon1.addPixmap(QtGui.QPixmap("icons/typcn_contacts.png"),
                        QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.contactsBtn.setIcon(icon1)
        self.contactsBtn.setIconSize(QtCore.QSize(40, 40))
        self.contactsBtn.setObjectName("contactsBtn")

        self.dateBtn = QtWidgets.QPushButton(self.centralwidget)
        self.dateBtn.setGeometry(QtCore.QRect(840, 30, 101, 101))
        self.dateBtn.setStyleSheet("\n"
                                   "background-color: #121212;\n"
                                   "border-radius: 50%;\n"
                                   "border: 2px solid white;")
        self.dateBtn.setText("")
        icon2 = QtGui.QIcon()
        icon2.addPixmap(QtGui.QPixmap("icons/Group.png"),
                        QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.dateBtn.setIcon(icon2)
        self.dateBtn.setIconSize(QtCore.QSize(40, 40))
        self.dateBtn.setObjectName("dateBtn")

        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 1006, 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)

        self.infoBtn.clicked.connect(partial(self.show_popup))
        self.dateBtn.clicked.connect(self.openDateWindow)
        self.startBtn.clicked.connect(self.openDriveWindow)
        self.contactsBtn.clicked.connect(self.openContactWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.infoBtn.setText(_translate("MainWindow", "About"))
        self.startBtn.setText(_translate("MainWindow", "Driving Mode"))

    def show_popup(self):
        msg = QMessageBox()
        msg.setWindowTitle('About Us')
        msg.setText('Testing')
        msg.setIcon(QMessageBox.Information)
        x = msg.exec_()

    def openDateWindow(self, MainWindow):
        self.window = QtWidgets.QMainWindow()
        self.ui = Ui_DateWindow()
        self.ui.setupUi(self.window, MainWindow)
        self.window.show()
        MainWindow.hide()

    def openDriveWindow(self, MainWindow):
        self.window = QtWidgets.QMainWindow()
        self.ui = Ui_DriveWindow()
        self.ui.setupUi(self.window, MainWindow)
        self.window.show()
        MainWindow.hide()

    def openContactWindow(self, MainWindow):
        self.window = QtWidgets.QMainWindow()
        self.ui = Ui_ContactWindow()
        self.ui.setupUi(self.window, MainWindow)
        self.window.show()
        MainWindow.hide()

app = QApplication(sys.argv)
splash = SplashScreen()
#splash.show()

sys.exit(app.exec_())