有没有办法确保函数在另一个启动之前运行到最后？

Question

这就是我所做的：我对库中的不同部分有一个png计划。在PyQt5中，每个部分都有一个按钮，当按下该按钮时，将基本png与突出显示相应部分的副本交替。

请参阅下面的代码，了解我的穴居人解决问题的方法。

它工作但是如果我点击cdLoc按钮但不等待它结束并按下dvdLoc，dvdLoc将运行然后将完成运行cdLoc，突出显示错误的部分。

所以我的问题 - 除了任何更好地完成这项工作的建议之外 - 是否有办法让函数一次运行一个或禁止在我运行特定函数时启动任何其他函数？

编辑：我不能添加png文件，所以我把它按钮输出打印到控制台。如果你点击Cds然后在第一个之前的Dvds是另一个，它将在结尾打印Cds。

from PyQt5 import QtCore, QtGui, QtWidgets, QtTest
from PyQt5.QtGui import QIcon, QPixmap

import time

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 662)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(10, 10, 640, 562))
        self.label.setFrameShape(QtWidgets.QFrame.Box)
        self.label.setText("")
        self.label.setObjectName("label")
        pixmap = QPixmap('blank.png') 
        self.label.setPixmap(pixmap)
        self.label_2 = QtWidgets.QLabel(self.centralwidget)
        self.label_2.setGeometry(QtCore.QRect(160, 580, 334, 32))
        font = QtGui.QFont()
        font.setFamily("Segoe UI")
        font.setPointSize(18)
        self.label_2.setFont(font)
        self.label_2.setObjectName("label_2")

        self.cds = QtWidgets.QPushButton(self.centralwidget)
        self.cds.setGeometry(QtCore.QRect(650, 130, 141, 23))
        self.cds.setObjectName("cds")
        self.dvd = QtWidgets.QPushButton(self.centralwidget)
        self.dvd.setGeometry(QtCore.QRect(650, 160, 141, 23))
        self.dvd.setObjectName("dvd")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 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.cds.clicked.connect(self.cdLoc)
        self.dvd.clicked.connect(self.dvdLoc)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "Library Plan"))
        self.label_2.setText(_translate("MainWindow", "Library plan"))
        self.cds.setText(_translate("MainWindow", "Cds"))
        self.dvd.setText(_translate("MainWindow", "Dvds"))

    def cdLoc(self):
        print('cd') # I had to replace my code but so it can be tested but the orignal code uses these two lines instead of printing : pixmap = Pixmap('pictureName.png') and self.label.setPixmap(pixmap)
        QtTest.QTest.qWait(1000)
        print('base')
        QtTest.QTest.qWait(500)
        print('cd')
        QtTest.QTest.qWait(1000)
        print('base')
        QtTest.QTest.qWait(500)
        print('cd')

    def dvdLoc(self):
        print('dvd')
        QtTest.QTest.qWait(1000)
        print('base')
        QtTest.QTest.qWait(500)
        print('dvd')
        QtTest.QTest.qWait(1000)
        print('base')
        QtTest.QTest.qWait(500)
        print('dvd')

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

启用：bool

此属性保存是否启用了窗口小部件

通常，启用的小部件处理键盘和鼠标事件;禁用的小部件不会。

import sys
from PyQt5.QtCore    import *
from PyQt5.QtGui     import *
from PyQt5.QtWidgets import *
from PyQt5           import QtTest


class Window(QWidget):
    def __init__(self):
        super(Window, self).__init__()

        self.label = QLabel()

        self.cdLocButton = QPushButton('cdLocButton')
        self.cdLocButton.clicked.connect(self.cdLoc)

        self.dvdLocButton = QPushButton('dvdLocButton')
        self.dvdLocButton.clicked.connect(self.dvdLoc)

        layout = QVBoxLayout(self)
        layout.addWidget(self.label)
        layout.addWidget(self.cdLocButton)
        layout.addWidget(self.dvdLocButton)        

    def cdLoc(self):
        self.dvdLocButton.setEnabled(False)                   # <---

        pixmap = QPixmap('Ok.png')
        self.label.setPixmap(pixmap)
        QtTest.QTest.qWait(1000)
        pixmap = QPixmap('im.png')
        self.label.setPixmap(pixmap)
        QtTest.QTest.qWait(500)
        pixmap = QPixmap('Ok.png')
        self.label.setPixmap(pixmap)
        QtTest.QTest.qWait(1000)
        pixmap = QPixmap('im.png')
        self.label.setPixmap(pixmap)
        QtTest.QTest.qWait(500)
        pixmap = QPixmap('Ok.png')
        self.label.setPixmap(pixmap)

        self.dvdLocButton.setEnabled(True)                    # <---

    def dvdLoc(self):
        self.cdLocButton.setEnabled(False)
        pixmap = QPixmap('exit.png')
        self.label.setPixmap(pixmap)
        QtTest.QTest.qWait(1000)
        pixmap = QPixmap('save.png')
        self.label.setPixmap(pixmap)
        QtTest.QTest.qWait(500)
        pixmap = QPixmap('exit.png')
        self.label.setPixmap(pixmap)
        QtTest.QTest.qWait(1000)
        pixmap = QPixmap('save.png')
        self.label.setPixmap(pixmap)
        QtTest.QTest.qWait(500)
        pixmap = QPixmap('exit.png')
        self.label.setPixmap(pixmap)
        self.cdLocButton.setEnabled(True)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = Window()
    window.show()
    sys.exit(app.exec_())