python中PyQt信号和插槽如何连接

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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")

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