kivymd的工具栏还没有left_action_items

Question

如何从纯Python的kivymd left_action_items或right_action_items中确定工具栏。

我尝试写：left_action_items：[[''icon.png'，lambda x：通过]]

 from kivymd.theming import ThemeManager
 from kivy.uix.boxlayout import BoxLayout
 from kivy.app import App
 from kivymd.toolbar import Toolbar
 class StartScreen(BoxLayout):
    def __init__(self, **args):
        super().__init__(**args)
        self.orientation = 'vertical'
        toolbar = Toolbar(title = 'Welcome', left_action_items = [['red.png', lambda x: print('hello')]]) 
        self.add_widget(toolbar)

 class Program(App): 
    theme_cls = ThemeManager()
    title = "Application"
    def build(self): 
        return StartScreen()    

Program().run() 

写入错误： KeyError ='left_action'

Answer 1

您可以在实例化left_action_items小部件之后尝试添加Toolbar属性。

toolbar = Toolbar(title = "Welcome")
toolbar.left_action_items = [["facebook", lambda x: print('Hello World')]]

您可以在icon_definitions.py的kivymd中找到一些图标。