PyQt5 检索文件夹目录并将其设置为行编辑

Question

需要一些有关如何检索所选文件夹的目录路径并将其设置在 LineEdit 上的建议。

我有以下简单的 GUI

如果我单击工具按钮（红圈内的按钮），则会弹出一个对话框窗口。然后我们可以导航以选择所需的文件夹。我希望一旦用户单击“选择文件夹”，我就可以将所选文件夹的路径（以字符串形式）传递到按钮旁边的 lineEdit 框。但是，我无法弄清楚如何做到这一点。到目前为止，这是我的代码：

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_TestQFileDialog(object):
    def _open_file_dialog(self): # a function to open the dialog window
        result = str(QtWidgets.QFileDialog.getExistingDirectory())
        print(result)
        return result

    def setupUi(self, TestQFileDialog):
        TestQFileDialog.setObjectName("TestQFileDialog")
        TestQFileDialog.resize(240, 320)

        self.toolButtonOpenDialog = QtWidgets.QToolButton(TestQFileDialog)
        self.toolButtonOpenDialog.setGeometry(QtCore.QRect(210, 10, 25, 19))
        self.toolButtonOpenDialog.setObjectName("toolButtonOpenDialog")
        directory = self.toolButtonOpenDialog.clicked.connect(self._open_file_dialog)

        self.lineEdit = QtWidgets.QLineEdit(TestQFileDialog)
        self.lineEdit.setEnabled(False)
        self.lineEdit.setGeometry(QtCore.QRect(10, 10, 191, 20))
        self.lineEdit.setObjectName("lineEdit")
        self.lineEdit.setText('{}'.format(directory))

        self.retranslateUi(TestQFileDialog)
        QtCore.QMetaObject.connectSlotsByName(TestQFileDialog)

    def retranslateUi(self, TestQFileDialog):
        _translate = QtCore.QCoreApplication.translate
        TestQFileDialog.setWindowTitle(_translate("TestQFileDialog", "Dialog"))
        self.toolButtonOpenDialog.setText(_translate("TestQFileDialog", "..."))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    TestQFileDialog = QtWidgets.QDialog()
    ui = Ui_TestQFileDialog()
    ui.setupUi(TestQFileDialog)
    TestQFileDialog.show()
    sys.exit(app.exec_())

尝试在 _open_file_dialog 函数中包含打印，并打印目录路径。但是，它没有返回并保存在目录变量中。

任何建议将不胜感激。

感谢致敬，

阿诺德

Answer 1

找到答案，.setText 方法应该包含在 _open_file_dialog 函数中。

因此，最终的代码如下所示：

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_TestQFileDialog(object):
    def _open_file_dialog(self):
        directory = str(QtWidgets.QFileDialog.getExistingDirectory())
        self.lineEdit.setText('{}'.format(directory))

    def _set_text(self, text):
        return text

    def setupUi(self, TestQFileDialog):
        TestQFileDialog.setObjectName("TestQFileDialog")
        TestQFileDialog.resize(240, 320)

        self.toolButtonOpenDialog = QtWidgets.QToolButton(TestQFileDialog)
        self.toolButtonOpenDialog.setGeometry(QtCore.QRect(210, 10, 25, 19))
        self.toolButtonOpenDialog.setObjectName("toolButtonOpenDialog")
        self.toolButtonOpenDialog.clicked.connect(self._open_file_dialog)

        self.lineEdit = QtWidgets.QLineEdit(TestQFileDialog)
        self.lineEdit.setEnabled(False)
        self.lineEdit.setGeometry(QtCore.QRect(10, 10, 191, 20))
        self.lineEdit.setObjectName("lineEdit")

        self.retranslateUi(TestQFileDialog)
        QtCore.QMetaObject.connectSlotsByName(TestQFileDialog)

    def retranslateUi(self, TestQFileDialog):
        _translate = QtCore.QCoreApplication.translate
        TestQFileDialog.setWindowTitle(_translate("TestQFileDialog", "Dialog"))
        self.toolButtonOpenDialog.setText(_translate("TestQFileDialog", "..."))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    TestQFileDialog = QtWidgets.QDialog()
    ui = Ui_TestQFileDialog()
    ui.setupUi(TestQFileDialog)
    TestQFileDialog.show()
    sys.exit(app.exec_())