在 QMenu 中一次检查一个 QAction

Question

我正在尝试从 QMenu 中进行选择，以便一次只能选择一个，并且默认情况下设置选中第一项(这实际上有效(。

这是我的代码片段：

paymentType = QMenu('Payment Type', self)
paymentType.addAction(QAction('Cash', paymentType, checkable=True, checked = True))
paymentType.addAction(QAction('Noncash Payment', paymentType, checkable=True))
paymentType.addAction(QAction('Cash on Delivery', paymentType, checkable=True))
paymentType.addAction(QAction('Bank Transfer', paymentType, checkable=True))
menu.addMenu(paymentType)

有什么建议吗？谢谢！

Answer 1

一个可能的选择是使用 QActionGroup 并激活 exclusive 属性

import sys
from PyQt5.QtWidgets import *
class MainWindow(QMainWindow):
    def __init__(self, *args, **kwargs):
        QMainWindow.__init__(self, *args, **kwargs)
        menu = self.menuBar()
        paymentType = QMenu('Payment Type', self)
        group = QActionGroup(paymentType)
        texts = ["Cash", "Noncash Payment", "Cash on Delivery", "Bank Transfer"]
        for text in texts:
            action = QAction(text, paymentType, checkable=True, checked=text==texts[0])
            paymentType.addAction(action)
            group.addAction(action)
        group.setExclusive(True)
        group.triggered.connect(self.onTriggered)
        menu.addMenu(paymentType)
    def onTriggered(self, action):
        print(action.text())
if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())