Python PyQt5线程不起作用

Question

我想创建一个显示（忙）的进度条，直到按钮的代码结束。我的目标是按下按钮（连接到功能）时显示它，在代码运行时保持可见，并在连接到该功能时隐藏它按钮结束。此任务部分完成，但我的进度条setVisible（True）等待代码结束并显示。我的代码在这里：

from ui import Ui_MainWindow
from PyQt5 import QtCore, QtGui, QtWidgets, QtPrintSupport
from PyQt5.QtWidgets import QDialog,QWidget,QApplication, QInputDialog, QLineEdit, QFileDialog
from PyQt5.QtGui import QIcon

class ProgressThread(QtCore.QThread):
    job_done = QtCore.pyqtSignal('QString')
    def __init__(self, parent=None):
        super(ProgressThread, self).__init__(parent)
        self.gui_bar = None
    def do_work(self):
        self.job_done.emit(self.gui_bar)

    def run(self):
        self.do_work()

class mainProgram(QtWidgets.QMainWindow, Ui_MainWindow):                   #main window
    def __init__(self, parent=None):
        super(mainProgram, self).__init__(parent)
        self.setupUi(self)

        self.progress_thread = ProgressThread()
        self.progress_thread.job_done.connect(self.on_job_start)
        self.create_ui()

        self.B_aerodrome_data.clicked.connect(self.start_thread)

        self.B_aerodrome_data.clicked.connect(self.aerodrome_data)


    def aerodrome_data(self):          #def i want with start show progress bar
        #here show progressBar(self.progress.setVisible(True) and update gui)
        #do many staffs of code here that takes time

        #here hide progress bar and update gui 

    def start_thread(self):
        self.progress_thread.gui_bar = self.progress.setVisible(False)
        self.progress_thread.start()

    def on_job_done(self):
        print("Generated string : ")
        self.progress.setVisible(False)


    def on_job_start(self):
        print("aaaaaaaaaa")
        self.progress.setRange(0,0)
        self.progress.setVisible(True)
    def create_ui(self):
        self.progress = QtWidgets.QProgressBar(self)
        self.progress.setVisible(False)
        self.progress.setGeometry(200, 205, 250, 20)
        self.progress.setRange(0, 0)
        self.progress.setObjectName("progress")
        #self.button.clicked.connect(self.start_thread)
        layout = QtWidgets.QVBoxLayout(self)
        #layout.addWidget(self.button)

if __name__ == "__main__":                       
    app = QtWidgets.QApplication(sys.argv)
    nextGui = mainProgram()
    nextGui.showMaximized()
    sys.exit(app.exec_()) 

Ui_Mainwindow在这里：

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1371, 924)
        MainWindow.setAcceptDrops(True)
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap("images/356.ico"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        MainWindow.setWindowIcon(icon)
        MainWindow.setAutoFillBackground(True)
        MainWindow.setDocumentMode(True)
        self.centralWidget = QtWidgets.QWidget(MainWindow)
        self.centralWidget.setObjectName("centralWidget")
        self.L_adinput = QtWidgets.QLabel(self.centralWidget)
        self.L_adinput.setGeometry(QtCore.QRect(30, 70, 141, 31))
        self.L_adinput.setObjectName("L_adinput")
        # self.progress = QtWidgets.QProgressBar(self)
        # self.progress.setGeometry(200, 205, 250, 20)
        # self.progress.setProperty("value", 0)
        # self.progress.setObjectName("progress")
        self.L_progress = QtWidgets.QLabel(self.centralWidget)
        self.L_progress.setGeometry(QtCore.QRect(150, 200, 141, 31))
        self.L_progress.setObjectName("L_progress")
        self.B_aerodrome_data = QtWidgets.QPushButton(self.centralWidget)
        self.B_aerodrome_data.setGeometry(QtCore.QRect(670, 100, 271, 41))
        self.B_aerodrome_data.setObjectName("B_aerodrome_data")
        self.T_aerodrome_ouput = QtWidgets.QTextEdit(self.centralWidget)
        self.T_aerodrome_ouput.setGeometry(QtCore.QRect(30, 230, 561, 371))
        self.T_aerodrome_ouput.setReadOnly(True)
        self.T_aerodrome_ouput.setObjectName("T_aerodrome_ouput")
        self.B_alternates = QtWidgets.QPushButton(self.centralWidget)
        self.B_alternates.setGeometry(QtCore.QRect(670, 160, 271, 41))
        self.B_alternates.setObjectName("B_alternates")
        self.B_weather = QtWidgets.QPushButton(self.centralWidget)
        self.B_weather.setGeometry(QtCore.QRect(670, 220, 271, 41))
        self.B_weather.setObjectName("B_weather")
        self.B_fuel = QtWidgets.QPushButton(self.centralWidget)
        self.B_fuel.setEnabled(True)
        self.B_fuel.setGeometry(QtCore.QRect(1050, 100, 271, 41))
        self.B_fuel.setObjectName("B_fuel")
        self.set_path1 = QtWidgets.QPushButton(self.centralWidget)
        self.set_path1.setEnabled(True)
        self.set_path1.setGeometry(QtCore.QRect(1100, 160, 101, 31))
        self.set_path1.setObjectName("set_path1")
        self.set_path2 = QtWidgets.QPushButton(self.centralWidget)
        self.set_path2.setEnabled(True)
        self.set_path2.setGeometry(QtCore.QRect(1100, 210, 101, 31))
        self.set_path2.setObjectName("set_path2")
        self.set_path3 = QtWidgets.QPushButton(self.centralWidget)
        self.set_path3.setEnabled(True)
        self.set_path3.setGeometry(QtCore.QRect(1100, 260, 101, 31))
        self.set_path3.setObjectName("set_path3")
        self.set_path4 = QtWidgets.QPushButton(self.centralWidget)
        self.set_path4.setEnabled(True)
        self.set_path4.setGeometry(QtCore.QRect(1100, 310, 101, 31))
        self.set_path4.setObjectName("set_path4")
        self.set_path5 = QtWidgets.QPushButton(self.centralWidget)
        self.set_path5.setEnabled(True)
        self.set_path5.setGeometry(QtCore.QRect(1100, 360, 101, 31))
        self.set_path5.setObjectName("set_path5")
        self.tool1 = QtWidgets.QToolButton(self.centralWidget)
        self.tool1.setGeometry(QtCore.QRect(1240, 170, 25, 19))
        self.tool1.setObjectName("tool1")
        self.tool2 = QtWidgets.QToolButton(self.centralWidget)
        self.tool2.setGeometry(QtCore.QRect(1240, 220, 25, 20))
        self.tool2.setObjectName("tool2")
        self.tool3 = QtWidgets.QToolButton(self.centralWidget)
        self.tool3.setGeometry(QtCore.QRect(1240, 270, 25, 19))
        self.tool3.setObjectName("tool3")
        self.tool4 = QtWidgets.QToolButton(self.centralWidget)
        self.tool4.setGeometry(QtCore.QRect(1240, 320, 25, 19))
        self.tool4.setObjectName("tool4")
        self.tool1x = QtWidgets.QToolButton(self.centralWidget)
        self.tool1x.setGeometry(QtCore.QRect(1280, 220, 25, 19))
        self.tool1x.setObjectName("tool1x")
        self.tool2x = QtWidgets.QToolButton(self.centralWidget)
        self.tool2x.setGeometry(QtCore.QRect(1280, 270, 25, 19))
        self.tool2x.setObjectName("tool2x")
        self.tool3x = QtWidgets.QToolButton(self.centralWidget)
        self.tool3x.setGeometry(QtCore.QRect(1280, 320, 25, 19))
        self.tool3x.setObjectName("tool3x")
        self.tool4x = QtWidgets.QToolButton(self.centralWidget)
        self.tool4x.setGeometry(QtCore.QRect(1280, 370, 25, 19))
        self.tool4x.setObjectName("tool4x")
        self.line = QtWidgets.QFrame(self.centralWidget)
        self.line.setGeometry(QtCore.QRect(990, -50, 20, 851))
        self.line.setFrameShape(QtWidgets.QFrame.VLine)
        self.line.setFrameShadow(QtWidgets.QFrame.Sunken)
        self.line.setObjectName("line")
        self.T_aerodromes_input = QtWidgets.QTextEdit(self.centralWidget)
        self.T_aerodromes_input.setGeometry(QtCore.QRect(30, 100, 331, 71))
        self.T_aerodromes_input.setStyleSheet("font: 10pt \"MS Shell Dlg 2\";")
        self.T_aerodromes_input.setObjectName("T_aerodromes_input")
        self.label = QtWidgets.QLabel(self.centralWidget)
        self.label.setGeometry(QtCore.QRect(30, 200, 161, 31))
        self.label.setObjectName("label")
        self.B_print = QtWidgets.QPushButton(self.centralWidget)
        self.B_print.setGeometry(QtCore.QRect(530, 230, 41, 31))
        self.B_print.setText("")
        icon1 = QtGui.QIcon()
        icon1.addPixmap(QtGui.QPixmap("images/printer.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.B_print.setIcon(icon1)
        self.B_print.setIconSize(QtCore.QSize(41, 31))
        self.B_print.setObjectName("B_print")
        self.B_clear = QtWidgets.QPushButton(self.centralWidget)
        self.B_clear.setGeometry(QtCore.QRect(490, 230, 41, 31))
        self.B_clear.setText("")
        self.label_2 = QtWidgets.QLabel(self.centralWidget)
        self.label_2.setGeometry(QtCore.QRect(670, 30, 271, 41))
        self.label_2.setStyleSheet("font: 75 11pt \"MS Shell Dlg 2\";")
        self.label_2.setAlignment(QtCore.Qt.AlignCenter)
        self.label_2.setObjectName("label_2")
        self.label_3 = QtWidgets.QLabel(self.centralWidget)
        self.label_3.setGeometry(QtCore.QRect(1050, 30, 271, 41))
        self.label_3.setStyleSheet("font: 75 11pt \"MS Shell Dlg 2\";")
        self.label_3.setAlignment(QtCore.Qt.AlignCenter)
        self.label_3.setObjectName("label_3")
        icon2 = QtGui.QIcon()
        icon2.addPixmap(QtGui.QPixmap("images/clear.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.B_clear.setIcon(icon2)
        self.B_clear.setIconSize(QtCore.QSize(41, 31))
        self.B_clear.setObjectName("B_clear")
        self.L_adinput.raise_()
        self.L_progress.raise_()
        self.B_aerodrome_data.raise_()
        self.T_aerodrome_ouput.raise_()
        self.B_alternates.raise_()
        self.B_weather.raise_()
        self.B_fuel.raise_()
        self.set_path2.raise_()
        self.set_path3.raise_()
        self.set_path4.raise_()
        self.set_path5.raise_()
        self.tool1.raise_()
        self.set_path1.raise_()
        self.tool2.raise_()
        self.tool3.raise_()
        self.tool4.raise_()
        self.tool1x.raise_()
        self.tool2x.raise_()
        self.tool3x.raise_()
        self.tool4x.raise_()
        self.line.raise_()
        self.T_aerodromes_input.raise_()
        self.label.raise_()
        self.B_print.raise_()
        self.B_clear.raise_()
        self.label_2.raise_()
        self.label_3.raise_()
        MainWindow.setCentralWidget(self.centralWidget)

        self.retranslateUi(MainWindow)
        self.tool1.clicked.connect(self.tool2.show)
        self.tool1.clicked.connect(self.set_path2.show)
        self.tool2.clicked.connect(self.tool3.show)
        self.tool3.clicked.connect(self.tool4.show)
        self.tool3.clicked.connect(self.set_path4.show)
        self.tool4.clicked.connect(self.set_path5.show)
        self.tool2.clicked.connect(self.set_path3.show)
        self.tool4x.clicked.connect(self.set_path5.hide)
        self.tool3x.clicked.connect(self.tool4.hide)
        self.tool3x.clicked.connect(self.set_path4.hide)
        self.tool2x.clicked.connect(self.tool3.hide)
        self.tool2x.clicked.connect(self.set_path3.hide)
        self.tool1x.clicked.connect(self.tool2.hide)
        self.tool1x.clicked.connect(self.set_path2.hide)
        self.tool4x.clicked.connect(self.tool4x.hide)
        self.tool3x.clicked.connect(self.tool3x.hide)
        self.tool2x.clicked.connect(self.tool2x.hide)
        self.tool1x.clicked.connect(self.tool1x.hide)
        self.tool1.clicked.connect(self.tool1x.show)
        self.tool2.clicked.connect(self.tool2x.show)
        self.tool3.clicked.connect(self.tool3x.show)
        self.tool4.clicked.connect(self.tool4x.show)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "Planner"))
        self.L_adinput.setText(_translate("MainWindow", "ICAO LOCATORS"))
        self.L_progress.setText(_translate("MainWindow", "Progress"))
        self.B_aerodrome_data.setText(_translate("MainWindow", "AERODROME DATA"))
        # self.T_aerodrome_ouput.setHtml(_translate("MainWindow", "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"
# "<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"
# "p, li { white-space: pre-wrap; }\n"
# "</style></head><body style=\" font-family:\'MS Shell Dlg 2\'; font-size:8.25pt; font-weight:400; font-style:normal;\">\n"
# "<p style=\"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><br /></p></body></html>"))
        self.B_alternates.setText(_translate("MainWindow", "ALTERNATES XLSX"))
        self.B_weather.setText(_translate("MainWindow", "WEATHER BRIEFING"))
        self.B_fuel.setText(_translate("MainWindow", "FUEL XLSX"))
        self.set_path1.setText(_translate("MainWindow", "SET FORM"))
        self.set_path2.setText(_translate("MainWindow", "SET FORM"))
        self.set_path3.setText(_translate("MainWindow", "SET FORM"))
        self.set_path4.setText(_translate("MainWindow", "SET FORM"))
        self.set_path5.setText(_translate("MainWindow", "SET FORM"))
        self.tool1.setText(_translate("MainWindow", "..."))
        self.tool2.setText(_translate("MainWindow", "..."))
        self.tool3.setText(_translate("MainWindow", "..."))
        self.tool4.setText(_translate("MainWindow", "..."))
        self.tool1x.setText(_translate("MainWindow", "X"))
        self.tool2x.setText(_translate("MainWindow", "X"))
        self.tool3x.setText(_translate("MainWindow", "X"))
        self.tool4x.setText(_translate("MainWindow", "X"))
        self.T_aerodromes_input.setPlaceholderText(_translate("MainWindow", "Set 4 character ICAO Locator here , divided by spaces..."))
        self.label.setText(_translate("MainWindow", "OUTPUT"))
        self.label_2.setText(_translate("MainWindow", "GENERAL"))
        self.label_3.setText(_translate("MainWindow", "FUEL"))

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_())

Answer 1

在你的情况下，我看到你已经不必要地创建了函数，我已经淘汰了一些。根据你告诉我的信息，信号没有必要携带信息，因此我将创建一个没有参数的信号。连接到按钮的插槽必须使QProgressBar可见并启动线程，并且信号job_done必须与隐藏QProgressBar的方法连接，在以下示例中使用QThread::sleep()来模拟某些处理。

class ProgressThread(QtCore.QThread):
    job_done = QtCore.pyqtSignal()

    def __init__(self, parent=None):
        super(ProgressThread, self).__init__(parent)

    def do_work(self):
        QtCore.QThread.sleep(2) # emulate processing
        self.job_done.emit()

    def run(self):
        self.do_work()


class mainProgram(QtWidgets.QMainWindow, Ui_MainWindow):  # main window
    def __init__(self, parent=None):
        super(mainProgram, self).__init__(parent)
        self.setupUi(self)

        self.progress_thread = ProgressThread()
        self.progress_thread.job_done.connect(self.on_job_done)
        self.create_ui()
        self.B_aerodrome_data.clicked.connect(self.aerodrome_data)

    def aerodrome_data(self):
        self.start_thread()

    def start_thread(self):
        self.progress.setVisible(True)
        self.progress_thread.start()

    def on_job_done(self):
        print("Generated string : ")
        self.progress.setVisible(False)

    def create_ui(self):
        [...]