1、为了让菜单选项和工具栏在用户点击它们时启动，需要将信号与内置插槽连接起来。
2、QAction物体可以发出各种信号。triggered()与插槽连接。
菜单和工具栏中最常用的信号是.triggered()。用户每次点击菜单选项或工具栏按钮都会发出这个信号。
实例
class Window(QMainWindow):
# Snip...
def newFile(self):
# Logic for creating a new file goes here...
self.centralWidget.setText("File > New clicked")
def openFile(self):
# Logic for opening an existing file goes here...
self.centralWidget.setText("File > Open... clicked")
def saveFile(self):
# Logic for saving a file goes here...
self.centralWidget.setText("File > Save clicked")
def copyContent(self):
# Logic for copying content goes here...
self.centralWidget.setText("Edit > Copy clicked")
def pasteContent(self):
# Logic for pasting content goes here...
self.centralWidget.setText("Edit > Paste clicked")
def cutContent(self):
# Logic for cutting content goes here...
self.centralWidget.setText("Edit > Cut clicked")
def helpContent(self):
# Logic for launching help goes here...
self.centralWidget.setText("Help > Help Content... clicked")
def about(self):
# Logic for showing an about dialog content goes here...
self.centralWidget.setText("Help > About... clicked")以上就是python PyQt信号和插槽的连接方法，希望对大家有所帮助。更多Python学习指路：创新互联python教程
本文教程操作环境：windows7系统、Python 3.9.1，DELL G3电脑。