创建返回参数的自定义对话框

Question

我只想创建一个小的应用程序，当按下按钮时打开另一个对话框。下面是对话框的代码。在

from PyQt4 import QtCore, QtGui

class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(508, 300)
        self.buttonBox = QtGui.QDialogButtonBox(Dialog)
        self.buttonBox.setGeometry(QtCore.QRect(150, 250, 341, 32))
        self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
        self.buttonBox.setStandardButtons(QtGui.QDialogButtonBox.Cancel|QtGui.QDialogButtonBox.Ok)
        self.buttonBox.setObjectName("buttonBox")
        self.label = QtGui.QLabel(Dialog)
        self.label.setGeometry(QtCore.QRect(10, 120, 181, 31))
        font = QtGui.QFont()
        font.setPointSize(16)
        self.label.setFont(font)
        self.label.setObjectName("label")
        self.sl_value = QtGui.QSlider(Dialog)
        self.sl_value.setGeometry(QtCore.QRect(220, 120, 161, 31))
        self.sl_value.setOrientation(QtCore.Qt.Horizontal)
        self.sl_value.setObjectName("sl_value")
        self.ed_value = QtGui.QLineEdit(Dialog)
        self.ed_value.setGeometry(QtCore.QRect(400, 120, 41, 31))
        font = QtGui.QFont()
        font.setPointSize(16)
        self.ed_value.setFont(font)
        self.ed_value.setObjectName("ed_value")
        self.retranslateUi(Dialog)
        QtCore.QObject.connect(self.buttonBox, QtCore.SIGNAL("accepted()"), Dialog.accept)
        QtCore.QObject.connect(self.buttonBox, QtCore.SIGNAL("rejected()"), Dialog.reject)
        QtCore.QMetaObject.connectSlotsByName(Dialog)


    def retranslateUi(self, Dialog):
        Dialog.setWindowTitle(QtGui.QApplication.translate("Dialog", "Dialog", None, QtGui.QApplication.UnicodeUTF8))
        self.label.setText(QtGui.QApplication.translate("Dialog", "Set example value:", None, QtGui.QApplication.UnicodeUTF8))

在主文件中，我添加了以下代码段

^{pr2}$

只要按下按钮，对话框就会打开，但对话框是完全空的，没有显示任何元素。 那么如何使元素在对话框中可见？？？ 但当我试图在主文件中导入对话框文件时，我遇到了错误

  cannot import name Ui_Dialog

Answer 1

使用PyQt5（对不起）。首先，ui定义：

# file ui_dialog.py

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(508, 300)
        self.buttonBox = QtWidgets.QDialogButtonBox(Dialog)
        self.buttonBox.setGeometry(QtCore.QRect(150, 250, 341, 32))
        self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
        self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
        self.buttonBox.setObjectName("buttonBox")
        self.sl_value = QtWidgets.QSlider(Dialog)
        self.sl_value.setGeometry(QtCore.QRect(220, 120, 161, 31))
        self.sl_value.setOrientation(QtCore.Qt.Horizontal)
        self.sl_value.setObjectName("sl_value")
        self.buttonBox.accepted.connect(Dialog.accept)
        self.buttonBox.rejected.connect(Dialog.reject)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

在同一目录中，应用程序定义：

^{pr2}$