AttributeError: 'MyMainWindow' 对象没有属性 'pushButton' [英] AttributeError: 'MyMainWindow' object has no attribute 'pushButton'

问题描述

尝试在我的代码中继续单击按钮事件，但遇到了一些问题.

Trying to proceed click button event in my code but got some issue.

AttributeError: 'MyMainWindow' object has no attribute 'pushButton'

似乎，clicked 事件无法从我的子类中找到 pushbutton.可能我在语法上犯了一些错误，所以真的在等待你们的帮助.对不起，如果这个问题很平庸，pyQt5 对我来说只是新的，试图弄清楚所有这些.

Seems, like clicked event can`t find pushbutton from my subclass. Probably i did some mistakes in syntax, so really waiting for your help guys. Sorry if the question very banal, pyQt5 is simply new for me, trying to figure out in all of this.

这是我的文件.

ui_main.py

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

# Form implementation generated from reading ui file '1.ui'
#
# Created by: PyQt5 UI code generator 5.7.1
#
# 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(349, 131)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
        self.gridLayout.setObjectName("gridLayout")
        self.formLayout = QtWidgets.QFormLayout()
        self.formLayout.setObjectName("formLayout")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setAlignment(QtCore.Qt.AlignHCenter|QtCore.Qt.AlignTop)
        self.lineEdit.setObjectName("lineEdit")
        self.formLayout.setWidget(1, QtWidgets.QFormLayout.SpanningRole, self.lineEdit)
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setAlignment(QtCore.Qt.AlignCenter)
        self.label.setObjectName("label")
        self.formLayout.setWidget(0, QtWidgets.QFormLayout.SpanningRole, self.label)
        self.gridLayout.addLayout(self.formLayout, 0, 0, 1, 1)
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setObjectName("pushButton")
        self.horizontalLayout.addWidget(self.pushButton)
        self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_2.setObjectName("pushButton_2")
        self.horizontalLayout.addWidget(self.pushButton_2)
        self.gridLayout.addLayout(self.horizontalLayout, 1, 0, 1, 1)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 349, 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.label.setText(_translate("MainWindow", "TextLabel"))
        self.pushButton.setText(_translate("MainWindow", "PushButton"))
        self.pushButton_2.setText(_translate("MainWindow", "PushButton"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

py_main.py

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, qApp
from PyQt5.QtCore import Qt, QEvent, QObject
from ui_main import Ui_MainWindow


class MyMainWindow(QMainWindow, Ui_MainWindow):
    def __init__(self, parent=None):
        super(MyMainWindow, self).__init__(parent)
        qApp.installEventFilter(self)
        self.pushButton.clicked.connect(self.clickButton()) #here is where the issue is occurs
        self.show()
        self.setupUi(self)

    def eventFilter(self, obj, event):
        if event.type() == QEvent.KeyPress:
            if event.key() == Qt.Key_Escape:
                self.close()
        return super(MyMainWindow, self).eventFilter(obj, event)

    def clickButton(self):
        sender = self.sender()
        self.statusbar().showMessage(sender.text() + ' was pressed')

if __name__ == '__main__':
    app = QApplication(sys.argv)
    win = MyMainWindow()
    test = TestClass()
    sys.exit(app.exec_())

期待您的帮助！

推荐答案

在您的代码中有 3 个错误:

In your code there are 3 errors:

1. 您必须先调用 setupUI 函数，因为按钮是在此处创建的，然后将该按钮连接到插槽.
2. 当按钮连接到插槽时，您只需传递不带括号的插槽名称.
3. 将 statusbar() 更改为 statusBar().

1. You must call the setupUI function first since the button is created here and then connect that button to the slot.
2. When the button is connected to the slot you just have to pass the slot name without parenthesis.
3. Change statusbar() to statusBar().

代码:

# ...
class MyMainWindow(QMainWindow, Ui_MainWindow):
    def __init__(self, parent=None):
        super(MyMainWindow, self).__init__(parent)
        qApp.installEventFilter(self)
        self.setupUi(self)
        self.pushButton.clicked.connect(self.clickButton)
        self.show()
# ...
    def clickButton(self):
        sender = self.sender()
        self.statusBar().showMessage(sender.text() + ' was pressed')
# ...

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