def __iniFigure(self): ##创建绘图系统，初始化窗口
self.__fig = mpl.figure.Figure(figsize=(8, 5)) #单位英寸
self.__fig.suptitle("plot in GUI application") #总的图标题
figCanvas = FigureCanvas(self.__fig) #创建FigureCanvas对象，必须传递一个Figure对象
## 下面这两行语句是行不通的
## figCanvas = FigureCanvas() #创建FigureCanvas对象，必须传递一个Figure对象
## self.__fig.set_canvas(figCanvas)
naviToolbar = NavigationToolbar(figCanvas, self) #创建工具栏
naviToolbar.setToolButtonStyle(
Qt.ToolButtonTextUnderIcon
) #ToolButtonTextUnderIcon,ToolButtonTextBesideIcon
self.addToolBar(naviToolbar) #添加工具栏到主窗口
self.setCentralWidget(figCanvas)
