pygame 意外显示的表面

您在左上角看到的是self.imageplayer1 精灵的。draw精灵组的方法在精灵image的rect.topleft坐标处blit s并且由于您从不移动player1.rect，图像将在默认的 (0, 0) 坐标处 blit。因此，只需删除该行self.snakes.draw(self.screen)即可解决此问题。我还建议您使用pygame.Rects 而不是self.xandself.y列表。您可以使用 theinit_x和init_ycoords 作为topleft属性创建 rect 实例并将它们放入self.rects列表中。这允许您简化更新和绘制方法，并且矩形也可用于碰撞检测。我已经重构了你的代码（它变成了一个小型的代码审查）：import pygameclass Snake(pygame.sprite.Sprite):  # Use upper camelcase names for classes (see PEP 8).    def __init__(self, init_x, init_y, image,screen):        pygame.sprite.Sprite.__init__(self)        # These are instance attributes now (use class attributes if        # the values should be shared between the instances).        self.speed = 5        self.init_length = 10        self.direction = 0        self.updateCountMax = 2        self.updateCount = 0        self.length = 10        # The body parts are rects now.        self.rects = []        for i in range(self.init_length):            # Append pygame.Rect instances.            self.rects.append(pygame.Rect(init_x, init_y, 11, 11))        self.image = image        self.screen = screen        self.rect = self.rects[0]  # I use the first rect as the self.rect.    def update(self):        for i in range(self.length-1, 0, -1):            # Update the topleft (x, y) positions of the rects.            self.rects[i].topleft = self.rects[i-1].topleft        if self.direction == 0:            self.rects[0].x += self.speed        elif self.direction == 1:            self.rects[0].x -= self.speed        elif self.direction == 2:            self.rects[0].y -= self.speed        elif self.direction == 3:            self.rects[0].y += self.speed    def draw(self):        # Iterate over the rects to blit them (I draw the outlines as well).        for rect in self.rects:            self.screen.blit(self.image, rect)            pygame.draw.rect(self.screen, (0, 255, 0), rect, 1)class App:    width = 1200    height = 900    title = "Snake"    done = False    def __init__(self):        pygame.init()        self.image = pygame.Surface((11, 11))        self.image.fill((0, 128, 255))        pygame.display.set_caption(self.title)        self.screen = pygame.display.set_mode((self.width, self.height))        self.clock = pygame.time.Clock()        self.snakes = pygame.sprite.Group()        self.player1 = Snake(500, 10, self.image, self.screen)        self.snakes.add(self.player1)    def loop(self):        while not self.done:            # Handle the events.            for event in pygame.event.get():                if event.type == pygame.QUIT:                        self.done = True            keys = pygame.key.get_pressed()            # In Python we simply set the values of the            # attributes directly instead of using getter            # and setter methods.            if keys[pygame.K_RIGHT]:                self.player1.direction = 0            if keys[pygame.K_LEFT]:                self.player1.direction = 1            if keys[pygame.K_UP]:                self.player1.direction = 2            if keys[pygame.K_DOWN]:                self.player1.direction = 3            if keys[pygame.K_ESCAPE]:                self.done = True            # Update the game.            self.player1.update()            # Draw everything.            self.screen.fill((0, 0, 0))            self.player1.draw()            pygame.draw.rect(self.screen, (255, 0, 0), self.player1.rect, 1)            pygame.display.update()            self.clock.tick(60)        pygame.quit()if __name__ == "__main__" :    the_app = App()    the_app.loop()

pygame 意外显示的表面

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