PyQt4到PyQt5连接信号[关闭]

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[2天前关闭。

我一直在遵循最初用PyQt4编写的一些代码。我正在使用PyQt5，想了解如何更改SIGNAL代码才能正常工作。

我知道新方法遵循这种格式，但是我似乎不太了解。

sender.signal.connect(slot)

PyQt4代码：

        # QtCore.QObject.connect(self.color_preferences_window, QtCore.SIGNAL(
        #     "return_color_prefs()"), self.finished_changing_colors)
        # QtCore.QObject.connect(self.value_preferences_window, QtCore.SIGNAL(
        #     "return_value_prefs()"), self.finished_changing_values)
        # QtCore.QObject.connect(self.grid, QtCore.SIGNAL(
        #     "return_current_cell_attributes(PyQt_PyObject)"), self.update_current_cell_info)

我的尝试：（失败）

        self.color_preferences_window.return_color_prefs.connect(self.finished_changing_colors)
        self.value_preferences_window.return_value_prefs.connect(self.finished_changing_values)
        self.grid.return_current_cell_attributes(self.update_current_cell_info)

编辑：

这里定义函数的方式：

    def finished_changing_values(self):
        # called by the value preferences window when the user is done
        if self.value_preferences_window.is_valid:
            self.value_preferences_window.hide_window()
            new_value_prefs = self.value_preferences_window.values
            new_value_attribs = self.value_preferences_window.attribs
            for attrib, value in list(zip(new_value_attribs, new_value_prefs)):
                self.grid.set_attrib_value(attrib, value)
            new_line_types = self.value_preferences_window.current_line_types
            line_names = self.value_preferences_window.lines
            for attrib, value in list(zip(line_names, new_line_types)):
                self.grid.set_line_type(attrib, value)
            self.grid.repaint()

        self.setEnabled(True)
        self.setWindowTitle(
            "AI Project 1 - (Width:"+str(self.size().width())+", Height:"+str(self.size().height())+")")

谢谢！

Answer 1

参考documentation：

from PyQt5.QtCore import QObject, pyqtSignal


class Foo(QObject):
    range_changed = pyqtSignal(int, int)  # args signature has to match with slot


class OtherClass(QObject):
    def __init__(self, first_class_ref, parent=None):
        super().__init__(parent)
        first_class_ref.range_changed.connect(self.my_slot)

    def my_slot(self, arg1, arg2):
        print(f"Slot triggered with: {arg1}, {arg2}")


# use it more-less like that:
one = Foo()
other = OtherClass(one)