为什么我不能更改点击屏幕？

问题描述

我正在尝试使用Kivy制作游戏。 我已经创建了一个开始屏幕和游戏屏幕。 该应用程序将无法运行，并且出现错误“ TypeError：bind（）接受0个位置参数（给定1个）”。 因此，当我尝试将屏幕操作绑定到“按开始”图像时，听起来好像存在一些问题。

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.image import Image
from kivy.core.window import Window
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.label import Label
from kivy.uix.behaviors import ButtonBehavior

#beginning of screen manager code

class MenuScreen(Screen):
    pass
class Game(Screen):
    pass

sm = ScreenManager()
sm.add_widget(MenuScreen(name = "menu"))
sm.add_widget(Game(name = "game"))

#end of screen manager code

class IconButton(ButtonBehavior, Image):
    pass

class MoveableImage(Image):

    def __init__(self, **kwargs):
        super(MoveableImage, self).__init__(**kwargs)
        self._keyboard = Window.request_keyboard(None, self)
        if not self._keyboard:
            return
        self._keyboard.bind(on_key_down=self.on_keyboard_down)
        self._keyboard.bind(on_key_up=self.on_keyboard_up)


    def on_keyboard_down(self, keyboard, keycode, text, modifiers):
        if keycode[1] == 'left':
            self.x -= 6
            self.source = 'selectionscreen/jeezyleft.zip'
        elif keycode[1] == 'right':
            self.x += 6
            self.source ='selectionscreen/jeezyright.zip'
        elif keycode[1] == 'down':
            self.y -= 6
            self.source ='selectionscreen/jeezyright.zip'
        elif keycode[1] == 'up':
            self.y += 6
            self.source = 'selectionscreen/jeezyback.zip'
        else:
            return False
        return True

    def on_keyboard_up(self, keyboard, keycode):
        if keycode[1] == 'left':
            self.source = 'selectionscreen/jeezyleft1.png'
        elif keycode[1] == 'right':
            self.source ='selectionscreen/jeezyright1.png'
        elif keycode[1] == 'down':
            self.source ='selectionscreen/jeezyright1.png'
        elif keycode[1] == 'up':
            self.source ='selectionscreen/jeezyback2.png'
        else:
            return False
        return True


class gameApp(App):
    def build(self):
        #instantiate menuscreen class
        p = MenuScreen()
        clickme = IconButton(source='selectionscreen/presstostart.png')
        #clickme = Label(text='Press to Start [ref=Start]Start[/ref]', markup=True)
        clickme.bind(sm.switch_to(Game(), direction='right'))
        p.add_widget(clickme)
        return p 


        #instantiate gamescreen class
        m = Game()
        wimg = MoveableImage(source='selectionscreen/jeezyright1.png',    anim_available=True, anim_delay=.15)
        m.add_widget(wimg)






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