保存QComboBox选择。 Q设置？

Question

因此，我试图保存QComboBox的选择设置（就像您所看到的CheckBox一样），以便当用户关闭应用程序并重新打开时，它会加载以前选择的设置。

如您所见，我尝试对QComboBox使用QSettings，但是每次关闭并重新打开GUI时，ComboBox都无法正确保存所选设置。它跳到索引1。

   self.comboBox = QComboBox()
    grid_layout.addWidget(self.comboBox, 4, 0)
    grid_layout.addItem(QSpacerItem(0, 0, QSizePolicy.Expanding, QSizePolicy.Expanding), 4, 1)
    self.comboBox.addItem("Choose a Number")
    self.comboBox.addItem("1")
    self.comboBox.addItem("2")
    self.comboBox.addItem("3")
    self.comboBox.addItem("4")
    # self.comboBox.highligh

    self.comboBox.activated.connect(self.randomFunction)
    self.check_box.clicked.connect(self.checkBox1Print)
    self.check_box2.clicked.connect(self.checkBox2Print)

    # Get settings
    settings = QSettings()

    # Get checkbox state
    check_state = settings.value(SETTINGS_TRAY, False, type=bool)

    # Set state
    self.check_box.setChecked(check_state)
    self.check_box2.setChecked(check_state)
    self.comboBox.setCurrentIndex(check_state)

    # connect the slot to the signal by clicking
    self.check_box.clicked.connect(self.save_check_box_settings)
    self.check_box2.clicked.connect(self.save_checkbox2_settings)
    self.comboBox.activated.connect(self.save_ComboBox_settings)


# Slot checkbox to save the settings
def save_check_box_settings(self):
    settings = QSettings()
    settings.setValue(SETTINGS_TRAY, self.check_box.isChecked())
    settings.sync()

def save_checkbox2_settings(self):
    settings = QSettings()
    settings.setValue(SETTINGS_TRAY, self.check_box2.isChecked())
    settings.sync()

def save_ComboBox_settings(self):
    settings = QSettings()
    settings.setValue(SETTINGS_TRAY, self.comboBox.currentIndex())
    settings.sync()



def checkBox1Print (self):
    print("Checkbox 1 Clicked")

def checkBox2Print (self):
    print("Checkbox 2 Clicked")

def randomFunction(self, index):
    print(self.comboBox.itemText(index))

Answer 1

您要保存与SETTINGS_TRAY键相关的所有信息，而必须创建一个名为SETTINGS_TRAY的组并为每个信息指定一个键：

from PyQt5 import QtCore, QtGui, QtWidgets

SETTINGS_TRAY = "Tray"

class Widget(QtWidgets.QWidget):
    def __init__(self, parent=None):
        super(Widget, self).__init__(parent)

        self.checkbox_1 = QtWidgets.QCheckBox("Settings Checkbox for minimizing to tray")
        self.checkbox_2 = QtWidgets.QCheckBox("This checkbox")
        self.combobox = QtWidgets.QComboBox()

        lay = QtWidgets.QVBoxLayout(self)
        lay.addWidget(QtWidgets.QLabel("Application, which can minimize to Tray"))
        lay.addWidget(self.checkbox_1)
        lay.addWidget(self.checkbox_2)
        lay.addWidget(self.combobox)
        lay.addStretch()
        self.combobox.addItems(["Choose a Number", "1", "2", "3","4"])
        self.readSettings()
        # connections
        self.combobox.currentTextChanged.connect(self.on_currentTextChanged)
        self.checkbox_1.stateChanged.connect(self.on_checked_1)
        self.checkbox_2.stateChanged.connect(self.on_checked_2)

    def readSettings(self):
        settings = QtCore.QSettings()
        settings.beginGroup(SETTINGS_TRAY)
        current_item = settings.value("option", type=str)
        if current_item is None:
            self.combobox.setCurrentIndex(0)
        else:
            self.combobox.setCurrentText(current_item)
        is_checked_1 = settings.value("checked_1", QtCore.Qt.Unchecked, type=QtCore.Qt.CheckState)
        self.checkbox_1.setChecked(is_checked_1)
        is_checked_2 = settings.value("checked_2", QtCore.Qt.Unchecked, type=QtCore.Qt.CheckState)
        self.checkbox_2.setChecked(is_checked_2)
        settings.endGroup()

    @QtCore.pyqtSlot(str)
    def on_currentTextChanged(self, text):
        settings = QtCore.QSettings()
        settings.beginGroup(SETTINGS_TRAY)
        settings.setValue("option", text)
        settings.endGroup()

    @QtCore.pyqtSlot(int)
    def on_checked_1(self, state):
        settings = QtCore.QSettings()
        settings.beginGroup(SETTINGS_TRAY)
        settings.setValue("checked_1", state)
        settings.endGroup()

    @QtCore.pyqtSlot(int)
    def on_checked_2(self, state):
        settings = QtCore.QSettings()
        settings.beginGroup(SETTINGS_TRAY)
        settings.setValue("checked_2", state)
        settings.endGroup()

if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication(sys.argv)
    w = Widget()
    w.resize(640, 240)
    w.show()
    sys.exit(app.exec_())