MyParent.ui裡有一個QPushbutton

將ui檔案轉為py檔案->MyParent.py

MySon.py：

class MySon(QDialog, MyParent.Ui_Dialog):
helpSignal = pyqtSignal(str)
    def __init__(self):
super().__init__(None)
        self.setupUi(self)
        self.num = 0
self.helpSignal.connect(self.showHelpMessage)

        self.btnYes = QtWidgets.QPushButton
 
(self)
        self.btnYes.clicked.connect(self.on_btnYes_clicked)
        self.btnYes.setGeometry(QtCore.QRect(0, 0, 60, 20))
        self.btnYes.setText('按鈕')

        self.pushButton.clicked.connect(self.on_MyPushButton_clicked)


    def keyPressEvent(self, event):
if event.key() == Qt.Key_F1:
self.helpSignal.emit
 
("help message")

    def showHelpMessage(self, message):
self.num += 1
print(self.num)
        print(message)

    def on_btnYes_clicked(self):
self.num += 1
print(self.num)

    def on_MyPushButton_clicked(self):
print('on_pushButton_clicked')

訊號和槽之間引數傳遞的幾種情況：

from PyQt5.QtWidgets import QPushButton, QComboBox
from 
 
functools import partial
class MySon(QDialog, MyParent.Ui_Dialog):
def __init__(self):
super().__init__(None)
        self.setupUi(self)
        self.__first = QPushButton(self)
        self.__second = QPushButton(self)
        self.__cbx_first = QComboBox(self)
        self.__cbx_second = QComboBox(self)
        self.__cbx_first.addItem('a')
        self.__cbx_first.addItem('b')
        self.__cbx_first.addItem('c')
        self.__cbx_second.addItem('d')
        self.__cbx_second.addItem('e')
        self.__cbx_second.addItem('f')
        self.__first.setGeometry(200, 200, 80, 20)
        self.__second.setGeometry(280, 200, 80, 20)
        self.__cbx_first.setGeometry(360, 200, 80, 20)
        self.__cbx_second.setGeometry(440, 200, 80, 20)
        self.__first.clicked.connect(partial(self.function, 4))
        self.__second.clicked.connect(lambda: self.function(2))
        self.__cbx_first.currentIndexChanged.connect(lambda: self.function(3))
        self.__cbx_second.currentIndexChanged[int].connect(self.cbxfun)
        self.__cbx_second.currentIndexChanged[str].connect(self.cbxfun2)

    def function(self, num):
print(num)

    def cbxfun(self, index):
print(index)

    def cbxfun2(self, s):
print(s)

第一個PushButton按下後會打出數字4

第二個PushButton按下後會打出數字2

第一個ComboBox選擇不同選項時會打出3

第二個ComboBox選擇不同選項時分別會打出

"0

d"，

"1

e"，

"2

f"