PyQt5 QSpinBox小工具
QSpinBox 是一个PyQt5小工具,它向用户展示了一个显示整数的文本框,其右侧有一个向上/向下的按钮。如果向上/向下按钮被按下,文本框中的值就会增加/减少。默认的最小值是0,最大值是99。
例子:
一个有Spinbox的窗口,当值发生变化时,将出现一条显示当前值的信息。
实施步骤 —
1.创建主窗口类
2.创建一个旋转盒部件
3.创建一个标签来显示数值
4.给旋转盒添加动作,当值发生变化时,动作应被调用
5.在动作中设置标签的值
以下是执行情况
# 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, 100, 40)
# adding action to the spin box
self.spin.valueChanged.connect(self.show_result)
# creating label show result
self.label = QLabel(self)
# setting geometry
self.label.setGeometry(100, 200, 200, 40)
# method called by spin box
def show_result(self):
# setting value of spin box to the label
self.label.setText("Value : " + str(self.spin.value()))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
window.show()
# start the app
sys.exit(App.exec())