PyQt5 QCalendarWidget 标题改变的信号

在这篇文章中，我们将看到如何从QCalendarWidget获得标题改变的信号。当日历的标题（即标题）改变时，就会发出标题改变的信号。设置标题也会发出同样的信号。

为了做到这一点，我们将使用QCalendarWidget对象的windowTitleChanged方法。
语法： calendar.windowTitleChanged.connect(lambda: print("Title Changed" ))

参数： 它不需要参数
执行的动作： 它将在信号发出的时候打印信息

下面是实现

# importing libraries
from PyQt5.QtWidgets import *
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import sys


class Window(QMainWindow):

    def __init__(self):
        super().__init__()

        # setting title
        self.setWindowTitle("Python ")

        # setting geometry
        self.setGeometry(100, 100, 600, 400)

        # calling method
        self.UiComponents()

        # showing all the widgets
        self.show()

    # method for components
    def UiComponents(self):

        # creating a QCalendarWidget object
        calendar = QCalendarWidget(self)

        # setting geometry to the calendar
        calendar.setGeometry(10, 10, 400, 250)

        # creating a label
        label = QLabel(self)

        # setting geometry to the label
        label.setGeometry(100, 280, 250, 60)

        # making label multi line
        label.setWordWrap(True)

        # text
        text = "Title Changed Signal Emitted"

        # getting the title changed signal and
        # when receives the signal printing the message
        calendar.windowTitleChanged.connect(lambda: label.setText(text))

        # setting caption to the calendar
        calendar.setWindowTitle("Title")


# create pyqt5 app
App = QApplication(sys.argv)

# create the instance of our Window
window = Window()

# start the app
sys.exit(App.exec())

输出：