如何使PyQt按钮工作？

Question

“在PyQt中创建一个旨在使当地社区图书馆受益的程序。该程序应该能够添加，编辑和删除图书分录和从库存清单。在

包括一个列表小部件、一行编辑框、一个标签、四个按钮。”

我可以将所有这些东西拖放到PyQt5中，将其另存为.ui，转换为.py并在空闲状态下打开，但是如何使按钮执行任何操作？另外，如何让空闲时间显示此框？在

This is what the program should look like

以下是保存.ui文件并转换为.py后留下的代码：

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'listoper.ui'
#
# Created by: PyQt5 UI code generator 5.6
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 450)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.listWidget = QtWidgets.QListWidget(self.centralwidget)
        self.listWidget.setGeometry(QtCore.QRect(260, 180, 256, 192))
        self.listWidget.setObjectName("listWidget")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(10, 230, 171, 91))
        self.lineEdit.setObjectName("lineEdit")
        self.Enterbookdetails = QtWidgets.QLabel(self.centralwidget)
        self.Enterbookdetails.setGeometry(QtCore.QRect(20, 200, 101, 16))
        self.Enterbookdetails.setObjectName("Enterbookdetails")
        self.Add = QtWidgets.QPushButton(self.centralwidget)
        self.Add.setGeometry(QtCore.QRect(10, 330, 75, 23))
        self.Add.setObjectName("Add")
        self.Delete = QtWidgets.QPushButton(self.centralwidget)
        self.Delete.setGeometry(QtCore.QRect(110, 330, 75, 23))
        self.Delete.setObjectName("Delete")
        self.Edit = QtWidgets.QPushButton(self.centralwidget)
        self.Edit.setGeometry(QtCore.QRect(10, 370, 75, 23))
        self.Edit.setObjectName("Edit")
        self.Deleteall = QtWidgets.QPushButton(self.centralwidget)
        self.Deleteall.setGeometry(QtCore.QRect(110, 370, 75, 23))
        self.Deleteall.setObjectName("Deleteall")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.Enterbookdetails.setText(_translate("MainWindow", "Enter Book Details:"))
        self.Add.setText(_translate("MainWindow", "Add"))
        self.Delete.setText(_translate("MainWindow", "Delete"))
        self.Edit.setText(_translate("MainWindow", "Edit"))
        self.Deleteall.setText(_translate("MainWindow", "Delete All"))

显然我应该使用以下代码，但我的按钮仍然不起作用：

千克到磅按钮：

^{pr2}$

磅到千克按钮：

def btn_PtoK_clicked(self):
pound = float(self.edt_Pounds.text())
kilo = (pound/2.2)
self.edt_Kilo.setText(str(kilo))

Answer 1

根据你上面的代码，这应该行得通

import sys
from PyQt5 import QtCore, QtWidgets
from YOUR_UI_MODULE import Ui_MainWindow
class sow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        QtWidgets.QMainWindow.__init__(self, parent)


        self.main_ui=Ui_MainWindow()
        self.main_ui.setupUi(self)
        self.main_ui.Add.clicked.connect(self.doAdd)
        self.main_ui.Edit.clicked.connect(self.doEdit)


    def doAdd(self):
        print("do add")

    def doEdit(self):
        print("do edit")

if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    myapp = sow()
    myapp.show()
    sys.exit(app.exec_())

检查PyQT5安装附带的示例并从中开始。 我的地址是C:\Python34\Lib\site packages\PyQt5\examples

PyQT有一个参考文档，我的文档位于这里C:/Python32/Lib/site packages/PyQt4/doc/html/类.html在

我建议您在进一步编写代码之前先阅读本教程，这样您就知道自己在做什么了。 http://zetcode.com/gui/pyqt5/firstprograms/