pyqt5界面与逻辑分离--信号槽的装饰器实现方式

 本文展示了 pyqt5 信号槽的装饰器实现方式(借鉴自 eirc6)

 

一个简单的例子。实现功能：两个数相加，显示结果。如图

 

两个文件，第一个是界面文件 ui_calc.py

# ui_calc.pyfrom PyQt5 import QtCore, QtGui, QtWidgetsclass Ui_Calc(object):        def setupUi(self, Form):        self.inputSpinBox1 = QtWidgets.QSpinBox(Form)        self.inputSpinBox1.setGeometry(QtCore.QRect(1, 26, 46, 25))        self.inputSpinBox1.setObjectName("inputSpinBox1") # 必须                self.inputSpinBox2 = QtWidgets.QSpinBox(Form)        self.inputSpinBox2.setGeometry(QtCore.QRect(70, 26, 46, 25))        self.inputSpinBox2.setObjectName("inputSpinBox2") # 必须                self.outputWidget = QtWidgets.QLabel(Form)        self.outputWidget.setGeometry(QtCore.QRect(140, 24, 36, 27))        self.outputWidget.setObjectName("outputWidget") # 必须                QtCore.QMetaObject.connectSlotsByName(Form) # 必须

说明：1. 界面部件需要setObjectname ;  2. 最后必须 QtCore.QMetaObject.connectSlotsByName(Form)

 

 

第二个是逻辑文件 calc.py

# calc.pyfrom PyQt5.QtCore import pyqtSlotfrom PyQt5.QtWidgets import QApplication, QWidgetfrom ui_calc import Ui_Calc# 方式一class MyCalc(QWidget):    def __init__(self, parent=None):        super().__init__(parent)        self.ui = Ui_Calc()        self.ui.setupUi(self)    @pyqtSlot(int)    def on_inputSpinBox1_valueChanged(self, value):        self.ui.outputWidget.setText(str(value + self.ui.inputSpinBox2.value()))    @pyqtSlot(int)    def on_inputSpinBox2_valueChanged(self, value):        self.ui.outputWidget.setText(str(value + self.ui.inputSpinBox1.value()))# 方式二class MyCalc2(QWidget, Ui_Calc):    def __init__(self, parent=None):        super().__init__(parent)        self.setupUi(self)    @pyqtSlot(int)    def on_inputSpinBox1_valueChanged(self, value):        self.outputWidget.setText(str(value + self.inputSpinBox2.value()))    @pyqtSlot(int)    def on_inputSpinBox2_valueChanged(self, value):        self.outputWidget.setText(str(value + self.inputSpinBox1.value()))if __name__ == '__main__':    import sys    app = QApplication(sys.argv)    win = MyCalc()　　# win = MyCalc2()    win.show()    sys.exit(app.exec_())