我想通过“停止”按钮停止递减计数，但是现在代码不起作用。
我试图从here实施解决方案，但未成功。 我从.ui文件生成GUI代码，而我的“ setupUi”函数有2个参数（self，MainWindow），可能会在我的代码中造成问题（在链接的示例initUI函数中只有1个argumet（self）。
'''
from PyQt5 import QtCore, QtGui, QtWidgets
import time
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.setEnabled(True)
MainWindow.resize(1111, 321)
MainWindow.setFocusPolicy(QtCore.Qt.NoFocus)
MainWindow.setTabShape(QtWidgets.QTabWidget.Rounded)
self.process = QtCore.QProcess(self)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(450, 90, 101, 23))
self.pushButton.setCheckable(True)
self.pushButton.setObjectName("pushButton")
self.pushButton.clicked.connect(self.on_click)
self.label_3 = QtWidgets.QLabel(self.centralwidget)
self.label_3.setGeometry(QtCore.QRect(480, 150, 41, 31))
font = QtGui.QFont()
font.setPointSize(16)
self.label_3.setFont(font)
self.label_3.setFrameShape(QtWidgets.QFrame.NoFrame)
self.label_3.setTextFormat(QtCore.Qt.AutoText)
self.label_3.setScaledContents(False)
self.label_3.setAlignment(QtCore.Qt.AlignCenter)
self.label_3.setObjectName("label_3")
self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_2.setGeometry(QtCore.QRect(450, 230, 101, 23))
self.pushButton_2.setCheckable(False)
self.pushButton_2.setObjectName("pushButton_2")
self.pushButton_2.clicked.connect(self.process.kill)
MainWindow.setCentralWidget(self.centralwidget)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def on_click(self):
print("I used first function")
def Change_label():
print("I used second function")
self.label_3.setText('loop')
QtGui.QGuiApplication.processEvents()
time.sleep(0.5)
def onTimeout():
for i in range(1, 10):
time.sleep(0.5)
print(i)
self.label_3.setText(str(i))
QtGui.QGuiApplication.processEvents()
onTimeout()
Change_label()
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "Start"))
self.label_3.setText(_translate("MainWindow", "0"))
self.pushButton_2.setText(_translate("MainWindow", "Stop"))
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_())
'''
和错误信息：
'''
Traceback (most recent call last):
File "D:/Analizy/23_Start_Star_PRE_with_GUI/GUI_files/GUI_star_only_push_button_and_label.py", line 76, in <module>
ui.setupUi(MainWindow)
File "D:/Analizy/23_Start_Star_PRE_with_GUI/GUI_files/GUI_star_only_push_button_and_label.py", line 12, in setupUi
self.process = QtCore.QProcess(self)
TypeError: QProcess(parent: QObject = None): argument 1 has unexpected type 'Ui_MainWindow'
Process finished with exit code 1
'''