从PyQt GUI类外部访问GUI元素文本()

Question

Ui_MainWindow是通过设计工具和pyuic生成的.py文件。我想把PyQt图形界面中的文本值传递到另一个文件里，进行一些基本操作，然后返回结果。

父文件

from PyQt4 import QtCore, QtGui

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    _fromUtf8 = lambda s: s


class Ui_MainWindow(object):

    def setupUi(self, MainWindow):
        MainWindow.setObjectName(_fromUtf8("MainWindow"))
        MainWindow.resize(742, 515)
        self.centralwidget = QtGui.QWidget(MainWindow)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
        self.layoutWidget = QtGui.QWidget(self.centralwidget)
        self.layoutWidget.setGeometry(QtCore.QRect(70, 30, 601, 331))
        self.layoutWidget.setObjectName(_fromUtf8("layoutWidget"))
        self.gridLayout_2 = QtGui.QGridLayout(self.layoutWidget)
        self.gridLayout_2.setMargin(0)
        self.gridLayout_2.setObjectName(_fromUtf8("gridLayout_2"))
        self.gridLayout = QtGui.QGridLayout()
        self.gridLayout.setObjectName(_fromUtf8("gridLayout"))
        self.horizontalLayout = QtGui.QHBoxLayout()
        self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout"))
        self.label = QtGui.QLabel(self.layoutWidget)
        self.label.setObjectName(_fromUtf8("label"))
        self.horizontalLayout.addWidget(self.label)
        self.lineEdit = QtGui.QLineEdit(self.layoutWidget)
        self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
        self.horizontalLayout.addWidget(self.lineEdit)
        self.gridLayout.addLayout(self.horizontalLayout, 0, 0, 1, 1)
        self.horizontalLayout_2 = QtGui.QHBoxLayout()
        self.horizontalLayout_2.setObjectName(_fromUtf8("horizontalLayout_2"))
        self.label_2 = QtGui.QLabel(self.layoutWidget)
        self.label_2.setObjectName(_fromUtf8("label_2"))
        self.horizontalLayout_2.addWidget(self.label_2)
        self.textEdit = QtGui.QTextEdit(self.layoutWidget)
        self.textEdit.setObjectName(_fromUtf8("textEdit"))
        self.horizontalLayout_2.addWidget(self.textEdit)
        self.gridLayout.addLayout(self.horizontalLayout_2, 1, 0, 1, 1)
        self.horizontalLayout_3 = QtGui.QHBoxLayout()
        self.horizontalLayout_3.setObjectName(_fromUtf8("horizontalLayout_3"))
        self.label_3 = QtGui.QLabel(self.layoutWidget)
        self.label_3.setObjectName(_fromUtf8("label_3"))
        self.horizontalLayout_3.addWidget(self.label_3)
        self.lineEdit_2 = QtGui.QLineEdit(self.layoutWidget)
        self.lineEdit_2.setObjectName(_fromUtf8("lineEdit_2"))
        self.horizontalLayout_3.addWidget(self.lineEdit_2)
        self.gridLayout.addLayout(self.horizontalLayout_3, 2, 0, 1, 1)
        self.gridLayout_2.addLayout(self.gridLayout, 0, 0, 1, 1)
        self.pushButton = QtGui.QPushButton(self.layoutWidget)
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        self.gridLayout_2.addWidget(self.pushButton, 1, 0, 1, 1)
        MainWindow.setCentralWidget(self.centralwidget)
        self.statusbar = QtGui.QStatusBar(MainWindow)
        self.statusbar.setObjectName(_fromUtf8("statusbar"))
        MainWindow.setStatusBar(self.statusbar)


        self.retranslateUi(MainWindow)

        from textvalues import Valued
        QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL(_fromUtf8("clicked()")), Valued.callingdata)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))
        self.label.setText(QtGui.QApplication.translate("MainWindow", "Title", None, QtGui.QApplication.UnicodeUTF8))
        self.label_2.setText(QtGui.QApplication.translate("MainWindow", "Body", None, QtGui.QApplication.UnicodeUTF8))
        self.label_3.setText(QtGui.QApplication.translate("MainWindow", "Tag", None, QtGui.QApplication.UnicodeUTF8))
        self.pushButton.setText(QtGui.QApplication.translate("MainWindow", "Create", None, QtGui.QApplication.UnicodeUTF8))

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

子文件
在子文件中，我正在尝试获取输入的文本值……

from PyQt4 import QtCore, QtGui
from blog_tool import Ui_MainWindow

class Valued(QtGui.QMainWindow):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.ui = Ui_MainWindow()
        app = self.ui.setupUi(self)

    def callingdata():
        blog_title  = app.lineEdit.text()
        blog_body   = app.textEdit.toPlainText()
        blog_tag    = app.lineEdit_2.text()
        print "Title\n\t%s\nBody\n\t%s\nTag\n\t%s" % (blog_title, blog_body, blog_tag)

Answer 1

你的示例代码有几个问题。最主要的问题是你在修改由 pyuic 生成的GUI模块，这个是绝对不应该做的。你应该始终把GUI模块导入到你的主应用程序中，然后在那里面添加所有额外的代码。

其他问题主要是因为没有正确引用GUI中的小部件。在你的示例中，这些小部件都会成为你创建的 Ui_MainWindow 对象的属性，所以你可以通过 self.ui 来访问它们。

我在下面重新写了你的非GUI模块，给你展示一下应该如何把这些东西组合在一起。但在你尝试之前，确保你重新生成了你的GUI模块。

from PyQt4 import QtCore, QtGui
from blog_tool import Ui_MainWindow

class Valued(QtGui.QMainWindow):
    def __init__(self, parent=None):
        QtGui.QMainWindow.__init__(self, parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        self.ui.pushButton.clicked.connect(self.callingdata)

    def callingdata(self):
        blog_title = self.ui.lineEdit.text()
        blog_body = self.ui.textEdit.toPlainText()
        blog_tag = self.ui.lineEdit_2.text()
        print "Title\n\t%s\nBody\n\t%s\nTag\n\t%s" % (
            blog_title, blog_body, blog_tag)

if __name__ == '__main__':

    import sys
    app = QtGui.QApplication(sys.argv)
    window = Valued()
    window.show()
    sys.exit(app.exec_())