python PyQt信号和插槽的连接

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("<b>File > New</b> clicked")
 
    def openFile(self):
        # Logic for opening an existing file goes here...
        self.centralWidget.setText("<b>File > Open...</b> clicked")
 
    def saveFile(self):
        # Logic for saving a file goes here...
        self.centralWidget.setText("<b>File > Save</b> clicked")
 
    def copyContent(self):
        # Logic for copying content goes here...
        self.centralWidget.setText("<b>Edit > Copy</b> clicked")
 
    def pasteContent(self):
        # Logic for pasting content goes here...
        self.centralWidget.setText("<b>Edit > Paste</b> clicked")
 
    def cutContent(self):
        # Logic for cutting content goes here...
        self.centralWidget.setText("<b>Edit > Cut</b> clicked")
 
    def helpContent(self):
        # Logic for launching help goes here...
        self.centralWidget.setText("<b>Help > Help Content...</b> clicked")
 
    def about(self):
        # Logic for showing an about dialog content goes here...
        self.centralWidget.setText("<b>Help > About...</b> 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：python基础教程

本文教程操作环境：windows7系统、Python 3.9.1，DELL G3电脑。