pygame：绘图字体在课堂上失败：

Question

我有一个类警报，它在pygame中创建一个弹出类型功能。我想在弹出体中绘制文本，但它不起作用。我通过渲染文本并将其保存到位图来测试它。只是一个黑盒子。杀死我的东西，下面的那个类（按钮）工作完美，并被称为类警报的实例！至少我知道它不能成为参数传递问题我猜

class alert(object):
    def __init__(self,msg,x,y,dim_x,dim_y,the_game,screen,size=16):
        self.x = x
        self.y = y
        self.e_x = x+dim_x
        self.e_y = y+dim_y
        self.dim_x=dim_x
        self.real_dim_y=dim_y
        self.dim_y = dim_y

        self.the_game = the_game
        self.the_screen = screen
        self.font = the_game.font.Font(None,size)

        self.bitmap = the_game.Surface((dim_x,dim_y))
        self.bitmap.fill(ALERT_BODY)
        print "msg: %r" % msg
        if((msg!=None) and (msg!=False)):
            text = self.font.render(msg,1,(0,0,0))
            the_game.image.save(text,"text-test.bmp")
            self.bitmap.blit(text,[5, (self.e_y-((3*self.dim_y)/4))])
            the_game.image.save(self.bitmap,"alert-test.bmp")

        newx = self.x+(self.dim_y-45)/2
        newy = (self.e_y-(dim_y/6))
        self.close_button = button(the_game,newx,newy,45,12,ALERT_BUTTON,"OK",18)
        ret = self.close_button.setaction(self.btn_quit,False)

        self.Answer = False
        self.Quit=False

由于某种原因，这是有效的，我看不出差异：

class button(object):
    def __init__(self,pygame,x,y,dim_x,dim_y,color,phrase,font_size,text_color=(255,255,255)):
        self.is_clicked = False
        self.has_next = False
        self.next = None
        self.has_prev = False
        self.prev = None
        self.enable=True 
        self.x=x
        self.y=y
        self.dim_x=dim_x
        self.dim_y=dim_y
        self.e_x=x+dim_x
        self.e_y=y+dim_y
        self.color=color
        self.color2=color
        self.phrase=phrase
        self.has_action=False

        self.regularbitmap = pygame.Surface((dim_x,dim_y))
        self.clickedbitmap = pygame.Surface((dim_x,dim_y))
        self.regularbitmap.fill(color)
        self.clickedbitmap.fill((255,255,255))
        font = pygame.font.Font(None,font_size)
        text1 = font.render(phrase,1,text_color)
        text2 = font.render(phrase,1,(240,240,32))
        self.regularbitmap.blit(text1,[1, 1])
        self.clickedbitmap.blit(text2,[1, 1])
        self.currentbitmap = self.regularbitmap