使用qt-designer时，可以选择要设计的小部件的类型：
例如，您选择了一个主窗口，因此必须使用QMainWindow来实现它。
## Created by: PyQt5 UI pre generator 5.7## WARNING! All changes made in this file will be lost!import sysfrom PyQt5 import QtCore, QtGui, QtWidgetsfrom PyQt5.QtWidgets import QApplication, QMainWindowclass Ui_ImageDialog(object): def setupUi(self, MainWindow): MainWindow.setObjectName("MainWindow") MainWindow.resize(800, 600) self.centralwidget = QtWidgets.QWidget(MainWindow) self.centralwidget.setObjectName("centralwidget") self.pushButton = QtWidgets.QPushButton(self.centralwidget) self.pushButton.setGeometry(QtCore.QRect(160, 200, 191, 151)) self.pushButton.setObjectName("pushButton") self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget) self.pushButton_2.setGeometry(QtCore.QRect(450, 200, 191, 151)) self.pushButton_2.setObjectName("pushButton_2") self.label = QtWidgets.QLabel(self.centralwidget) self.label.setGeometry(QtCore.QRect(150, 70, 501, 101)) palette = QtGui.QPalette() brush = QtGui.QBrush(QtGui.QColor(255, 0, 255)) brush.setStyle(QtCore.Qt.SolidPattern) palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.WindowText, brush) brush = QtGui.QBrush(QtGui.QColor(255, 0, 255)) brush.setStyle(QtCore.Qt.SolidPattern) palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.WindowText, brush) brush = QtGui.QBrush(QtGui.QColor(127, 127, 127)) brush.setStyle(QtCore.Qt.SolidPattern) palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.WindowText, brush) self.label.setPalette(palette) font = QtGui.QFont() font.setPointSize(72) self.label.setFont(font) self.label.setLayoutDirection(QtCore.Qt.LeftToRight) self.label.setObjectName("label") MainWindow.setCentralWidget(self.centralwidget) self.menubar = QtWidgets.QMenuBar(MainWindow) self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 22)) 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.pushButton.setText(_translate("MainWindow", "Open Input File:")) self.pushButton_2.setText(_translate("MainWindow", "Run")) self.label.setText(_translate("MainWindow", "Happy Scraping"))app = QApplication(sys.argv)window = QMainWindow()ui = Ui_ImageDialog()ui.setupUi(window)window.show()sys.exit(app.exec_())如果要实现QDialog，则必须选择某些Dialog（底部带按钮的对话框，右侧带按钮的对话框或不含按钮的对话框）。
