python pyqt5 QSpinBox 计数器

-- coding: utf-8 --

''' 【简介】 PyQt5中 QSpinBox 例子

'''

import sys from PyQt5.QtCore import * from PyQt5.QtGui import * from PyQt5.QtWidgets import *

class spindemo(QWidget): def init(self, parent=None): super(spindemo, self).init(parent) self.setWindowTitle("SpinBox 例子") self.resize(300, 100)

    layout = QVBoxLayout()
    self.l1 = QLabel("current value:")
    self.l1.setAlignment(Qt.AlignCenter)
    layout.addWidget(self.l1)
    self.sp = QSpinBox()
    layout.addWidget(self.sp)
    self.sp.valueChanged.connect(self.valuechange)
    self.setLayout(layout)

def valuechange(self):
    self.l1.setText("current value:" + str(self.sp.value()))

if name == 'main': app = QApplication(sys.argv) ex = spindemo() ex.show() sys.exit(app.exec_())