PyQt5 QSpinBox – 获取动作被调用的对象
在这篇文章中,我们将看到如何获得动作被调用的旋转盒对象。假设有多个自旋盒在调用同一个动作(方法),所以我们不知道哪个自旋盒的动作被调用。为了获得被调用的自旋盒,我们必须跟踪自旋盒发出的信号,因为当信号发出时,动作被调用。
为了做到这一点,我们使用自旋盒对象的sender方法。
语法: spin_box.sender()
参数: 它不需要参数
返回: 它返回信号被发出的QSpinBox对象。
以下是实现方法
# 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, 600, 400)
# calling method
self.UiComponents()
# showing all the widgets
self.show()
# method for widgets
def UiComponents(self):
# creating spin box
self.spin = QSpinBox(self)
# setting geometry to spin box
self.spin.setGeometry(100, 100, 250, 40)
# setting range to the spin box
self.spin.setRange(1, 999999)
# setting prefix to spin
self.spin.setPrefix("PREFIX ")
# setting suffix to spin
self.spin.setSuffix(" SUFFIX")
# adding action to the spin box
self.spin.valueChanged.connect(self.do_something)
# creating another spin box
self.spin2 = QSpinBox(self)
# setting geometry
self.spin2.setGeometry(150, 50, 100, 40)
# adding same action to it
self.spin2.valueChanged.connect(self.do_something)
# creating a label
self.label = QLabel(self)
# making label multi line
self.label.setWordWrap(True)
# setting label geometry
self.label.setGeometry(100, 200, 250, 60)
def do_something(self):
# getting the sender
sender = self.spin.sender()
# setting text to the spin box
self.label.setText(str(sender))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())