如何知道在QButtonGroup中按下了哪个按钮？

Question

我有一个函数来创建一个框架，并在其中放置一个行编辑和一个按钮，然后将该按钮放在QButtonGroup上：

self.btn_group = QButtonGroup(self.ui_main.scrollArea_content)

def new(self):
    # Create the frame
    self.ui_main.frame_content = QFrame(self.ui_main.scrollArea_content)
    self.ui_main.frame_content.setObjectName(f"frame_content_{self.counter}")
    self.ui_main.frame_content.setMaximumSize(QSize(16777215, 70))
    self.ui_main.frame_content.setFrameShape(QFrame.StyledPanel)
    self.ui_main.frame_content.setFrameShadow(QFrame.Raised)
    # Create horizontal layout
    self.ui_main.horizontalLayout_4 = QHBoxLayout(self.ui_main.frame_content)
    self.ui_main.horizontalLayout_4.setObjectName(f"horizontalLayout_4_{self.counter}")
    # Create line edit content
    self.ui_main.line_content = QLineEdit(self.ui_main.frame_content)
    self.ui_main.line_content.setObjectName(f"line_content_{self.counter}")
    # Add line edit content to horizontal layout
    self.ui_main.horizontalLayout_4.addWidget(self.ui_main.line_content)
    # Create the button remove
    self.ui_main.btn_remove = QPushButton(self.ui_main.frame_content)
    self.ui_main.btn_remove.setObjectName(f"btn_remove_{self.counter}")
    self.ui_main.btn_remove.setMinimumSize(QSize(0, 50))
    self.ui_main.btn_remove.setMaximumSize(QSize(80, 16777215))
    self.ui_main.btn_remove.setText(u"Remove")
    # Add button remove to horizontal layout
    self.ui_main.horizontalLayout_4.addWidget(self.ui_main.btn_remove)
    # Add the frame content(contains line edit and button) to vertical layout
    self.ui_main.verticalLayout_3.addWidget(self.ui_main.frame_content, 0, Qt.AlignTop)
    # Add button to group
    self.btn_group.addButton(self.ui_main.btn_remove)
    # Increment the counter to name the next button
    self.counter += 1

之后，我将连接到按钮组，以初始化remove函数，该函数将删除包含行编辑和按钮的整个框架。

self.btn_group.buttonClicked.connect(self.remove)

但是，对于按钮组，我只能知道是否单击了任何按钮，而不是单击了哪个按钮，buttonClicked方法返回一个按钮组对象，该对象不包含所单击按钮的任何内容，有一种方法可以知道哪个按钮是在QButtonGroup中按下的？如果不是，我怎么能解决这个问题呢？

Answer 1

buttonClicked信号发送被单击的按钮：

def remove(self, button):
    print(button, button.text())

演示：

from PyQt5 import QtWidgets


if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)

    view = QtWidgets.QWidget()
    lay = QtWidgets.QVBoxLayout(view)
    group = QtWidgets.QButtonGroup()
    for i in range(5):
        button = QtWidgets.QPushButton(f"button-{i}")
        lay.addWidget(button)
        group.addButton(button)
    view.show()

    def handle_button_clicked(button):
        print(button, button.text())

    group.buttonClicked.connect(handle_button_clicked)

    sys.exit(app.exec_())

Answer 2

如果要在将按钮添加到组中时使用id对按钮进行编号，则可以使用idClicked(int id)信号。在某些用例中，使用id号比使用按钮名更容易。

示例(大量借用@eyllanesc的优秀答案)：

from PyQt5 import QtWidgets


if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)

    view = QtWidgets.QWidget()
    lay = QtWidgets.QVBoxLayout(view)
    group = QtWidgets.QButtonGroup()
    for i in range(5):
        button = QtWidgets.QPushButton(f"button-{i}")
        lay.addWidget(button)
        group.addButton(button, i)
    view.show()

    def handle_button_idclicked(id_):
        print('id of button is ', id_)
        print('text of button is ', group.button(id_).text())

    group.idClicked.connect(handle_button_idclicked)

    sys.exit(app.exec_())