PyQt5常用控件使用

先看效果：

import sys
from PyQt5.QtWidgets import QWidget,QApplication
from PyQt5.QtCore import pyqtSlot
from Price import Ui_Form

class PriceMain(QWidget):
    def __init__(self,parent = None):
        super().__init__(parent)
        self.ui = Ui_Form()
        self.ui.setupUi(self)

    def on_pushButtonTatol_clicked(self):
        num = int(self.ui.lineEditNum.text())
        price = float(self.ui.lineEditPrice.text())
        self.ui.lineEditTatol.setText("%.2f"%(num*price))

    @pyqtSlot(int)
    def on_spinBox_valueChanged(self,count):
        price = int(self.ui.lineEditPrice2.text())
        self.ui.lineEditTatol_2.setText("%.2f"%(count*price))

if __name__ == "__main__":
    app = QApplication(sys.argv)
    wgt = PriceMain()
    wgt.show()
    sys.exit(app.exec_())

对于具有overload型参数的信号，只为其中的一种参数形式的信号生成槽函数时，如果不是默认参数类型，应该使用@pyqtSlot修饰符声明参数类型

aaa