Learning

[clint456]

       @QtCore.Slot(int)
        def test_slot(state: int) -> None:
            if state == Qt.Checked:
                print("复选框被选中了！")
            elif state == Qt.Unchecked:
                print("复选框被取消选中了！")
            elif state == Qt.PartiallyChecked:
                print("复选框被部分选中！")

这里需要添加.value。