PyQt5 QDateTimeEdit – 仅当时间发生变化时发出信号
在这篇文章中,我们将看到如何在QDateTimeEdit小组件的时间变化时获得信号。QDateTime基本上是QDate和QTime的组合,即它同时具有日期和时间。而QDateTimeEdit小组件是用来显示或接收QDateTime的。我们可以在setDateTime方法的帮助下设置QDateTime。设置时间不会影响QDateTimeEdit的日期,它可以在setTime方法的帮助下被设置。
为了做到这一点,我们将使用QDateTimeEdit对象的timeChanged方法。
语法: datetimeedit.timeChanged.connect(method)
参数: 它把方法作为参数
返回: 它返回无。
下面是实现方法
# 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, 500, 400)
# calling method
self.UiComponents()
# showing all the widgets
self.show()
# method for components
def UiComponents(self):
# creating a QDateTimeEdit widget
datetimeedit = QDateTimeEdit(self)
# setting geometry
datetimeedit.setGeometry(100, 100, 150, 35)
# setting date time to it
datetimeedit.setDateTime(QDateTime(2020, 10, 10, 11, 30))
# time
time = QTime(21, 45)
# setting only time
datetimeedit.setTime(time)
# creating a label
label = QLabel("GeeksforGeeks", self)
# setting geometry to the label
label.setGeometry(100, 160, 200, 60)
# making label multi line
label.setWordWrap(True)
# getting current time
value = datetimeedit.time()
# setting text to the label
label.setText("Time : " + str(value))
# getting time change signal
datetimeedit.timeChanged.connect(lambda: label.setText("Time Change signal Emitted"))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())