使图像在kivy中充当按钮

from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.image import Image
from kivy.uix.boxlayout import BoxLayout

class MyLayout(BoxLayout):
    def __init__(self, **kwargs):
        super(MyLayout, self).__init__(**kwargs)
        
        # 创建图像按钮
        img_btn = Button(background_normal='path_to_image.png',
                         background_down='path_to_pressed_image.png',
                         on_release=self.on_button_click)
        
        # 将图像按钮添加到布局中
        self.add_widget(img_btn)

    def on_button_click(self, instance):
        # 在此处定义按钮点击时的操作
        pass

class MyApp(App):
    def build(self):
        return MyLayout()

if __name__ == '__main__':
    MyApp().run()