如何使用类，功能和for循环为pygame屏幕进行动画屏幕？

Question

我正在将自己置于SO社区的怜悯之中，现在已经看了以下时间了。我正在尝试为我的标题屏幕创建动画背景，该背景通过名为background_images的列表中的八个元素循环。通过调用rocket_settings类中的函数bg_start_animation，我希望使用列表的第一个元素填充自background。在屏幕上，将屏幕刷新在display.flip中，然后由列表的其他七个元素重复该过程以创建动画效果。

我使用以下方式存储了背景图像的最新迭代：

animated_bg = rocket_settings.bg_start_animation()

并闪烁到屏幕：

screen.blit(animated_bg, (0, 0))

请注意：Rocket_settings调用我在代码主体下方复制的类。

while True:
    pygame.time.delay(5)
    
    gf.check_events(rocket_settings, screen, character)
    character.update()
    gf.update_screen(rocket_settings, screen, character)

    # Redraw the screen during each pass through the loop
    character.update()
    #screen.blit(rocket_settings.background, (0, 0))
    animated_bg = rocket_settings.bg_start_animation()
    screen.blit(animated_bg, (0, 0))
    screen.blit(rocket_settings.title, (300, 180))
    character.blitme()
    #print(character.rect.bottom, ", ", character.rect.y) - to identify the coords
    #of the desired spawn point by experimenting in runtime.
    
    # Make the most recently drawn screen visible
    pygame.display.flip()

火箭设置的相关部分：

def bg_start_animation(self):
    # Screen animation loop
    background_images = ["images/wick_title_screen_1.bmp", 
    "images/wick_title_screen_2.bmp", "images/wick_title_screen_3.bmp",
    "images/wick_title_screen_4.bmp", "images/wick_title_screen_5.bmp",
    "images/wick_title_screen_6.bmp", "images/wick_title_screen_7.bmp",
    "images/wick_title_screen_8.bmp"]
    
    for background in background_images:
        self.background = pygame.image.load(background)
        return self.background

我必须忽略某些东西。预先感谢您，感谢您的帮助。

Answer 1

参见来自少数图像的动画精灵。您可以在精灵和背景上使用该方法。甚至可以从GIF加载图像。

在应用程序循环之前创建图像列表，然后在应用程序循环中绘制一个图像。使用计数器（background_index）通过图像迭代：

def load_background():
    background_images = ["images/wick_title_screen_1.bmp", 
    "images/wick_title_screen_2.bmp", "images/wick_title_screen_3.bmp",
    "images/wick_title_screen_4.bmp", "images/wick_title_screen_5.bmp",
    "images/wick_title_screen_6.bmp", "images/wick_title_screen_7.bmp",
    "images/wick_title_screen_8.bmp"]
    
    surface_list = []
    for background in background_images:
        surface_list.append(pygame.image.load(background))
    return surface_list

background_surface = load_background()
background_index = 0

clock = pygame.time.Clock()
while True:
    clock.tick(100)
    gf.check_events(rocket_settings, screen, character)
    
    if background_index >= len(background_surface):
        background_index = 0
    screen.blit(background_surface[background_index], (0, 0))  
    background_index += 1

    # [...]