从 PyQt GUI 类外部访问 GUI 元素 text()

Question

Ui_MainWindow 是由设计师和pyuic 生成的.py 文件，我想将PyQt GUI 元素文本值传递给另一个文件并进行一些基本操作并返回结果。

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 我正在尝试从子文件中获取输入文本值...

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

您的示例代码存在一些问题。主要问题是您正在修改由pyuic 生成的GUI 模块，您永远不应该这样做。始终将 GUI 模块导入您的主应用程序并在那里添加所有额外的代码。

其他问题主要是由于没有正确引用 GUI 中的小部件。在您的示例中，这些都将成为您创建的Ui_MainWindow 对象的属性，因此您可以通过self.ui 访问它们。

我在下面重新编写了您的非 GUI 模块，以向您展示应该如何组合在一起。但在尝试之前，请确保重新生成 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_())