Python QButtonGroup类详细介绍及常用方法

from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QRadioButton, QButtonGroup, QLabel
class RadioDemo(QWidget):
    def __init__(self):
        super().__init__()
        layout = QVBoxLayout(self)
        # 创建单选按钮
        self.radio1 = QRadioButton("选项1")
        self.radio2 = QRadioButton("选项2")
        self.radio3 = QRadioButton("选项3")
        # 创建按钮组并添加按钮
        self.group = QButtonGroup(self)
        self.group.addButton(self.radio1, 1)  # 分配 ID
        self.group.addButton(self.radio2, 2)
        self.group.addButton(self.radio3, 3)
        # 监听点击事件（带 ID）
        self.group.buttonClicked[int].connect(self.on_radio_clicked)
        # 添加控件到布局
        layout.addWidget(self.radio1)
        layout.addWidget(self.radio2)
        layout.addWidget(self.radio3)
        self.label = QLabel("当前选中：无")
        layout.addWidget(self.label)
    def on_radio_clicked(self, btn_id):
        self.label.setText(f"当前选中：选项{btn_id}")
app = QApplication([])
window = RadioDemo()
window.show()
app.exec_()

class CheckboxDemo(QWidget):
    def __init__(self):
        super().__init__()
        layout = QVBoxLayout(self)
        # 创建复选框
        self.check1 = QCheckBox("苹果")
        self.check2 = QCheckBox("香蕉")
        self.check3 = QCheckBox("橙子")
        # 创建非互斥按钮组
        self.group = QButtonGroup(self)
        self.group.setExclusive(False)  # 关闭互斥
        self.group.addButton(self.check1, 1)
        self.group.addButton(self.check2, 2)
        self.group.addButton(self.check3, 3)
        # 监听切换事件
        self.group.buttonToggled.connect(self.on_check_toggled)
        layout.addWidget(self.check1)
        layout.addWidget(self.check2)
        layout.addWidget(self.check3)
        self.label = QLabel("已选：无")
        layout.addWidget(self.label)
    def on_check_toggled(self, btn, checked):
        selected = [btn.text() for btn in self.group.buttons() if btn.isChecked()]
        self.label.setText(f"已选：{', '.join(selected)}")