按照書上寫的武裝飛船，寫到能夠左右移動了，但到了射擊（裝子彈）時候，按照書上的代碼照搬了，運行時沒顯示代碼有問題，但就是按了空格鍵，不見有子彈，其他都正常。 代碼： alien_invasion.py import sys import pygame from pygame.sprite import Group from settings import Settings from ship import Ship import game_functions as gf def run_game(): #初始化pygame、設置和屏幕對象 pygame.init() ai_settings = Settings() screen = pygame.display.set_mode( (ai_settings.screen_width,ai_settings.screen_height)) pygame.display.set_caption("Alien Invasion") #創建一艘飛船 ship = Ship(ai_settings,screen) #創建一個用于存儲子彈的編組 bullets = Group() #開始游戲主循環 while True: gf.check_events(ai_settings,screen,ship,bullets) ship.update() bullets.update() gf.update_screen(ai_settings,screen,ship,bullets) run_game() **game_functions.py** import sys import pygame from bullet import Bullet def check_keydown_events(event,ai_settings,screen,ship,bullets): """響應按鍵""" if event.key == pygame.K_RIGHT: ship.moving_right = True elif event.key == pygame.K_LEFT: ship.moving_left = True elif event.key == pygame.K_SPACE: #創建一顆子彈，并將其加入到編組bullets中 new_bullet = Bullet(ai_settings,screen,ship) bullets.add(new_bullet) def check_keyup_events(event,ship): """響應松開""" if event.key == pygame.K_RIGHT: ship.moving_right = False elif event.key == pygame.K_LEFT: ship.moving_left = False def check_events(ai_settings,screen,ship,bullets): """響應按鍵和鼠標事件""" for event in pygame.event.get(): if event.type == pygame.QUIT: sys.exit() elif event.type == pygame.KEYDOWN: check_keydown_events(event,ai_settings,screen,ship,bullets) elif event.type == pygame.KEYUP: check_keyup_events(event,ship) def update_screen(ai_settings,screen,ship,bullets): """更新屏幕上的圖像，并切換到新屏幕""" #每次循環時都重繪屏幕 screen.fill(ai_settings.bg_color) ship.blitme() #讓最近繪制的屏幕可見 pygame.display.flip() #在飛船和外星人后面重繪所有子彈 for bullet in bullets.sprites(): bullet.draw_bullet() **bullet.py** import pygame from pygame.sprite import Sprite class Bullet(Sprite): """一個對飛船發射的子彈進行管理的類""" def __init__(self,ai_settings,screen,ship): """在飛船所處的位置創建一個子彈對象""" super(Bullet,self). __init__() self.screen = screen #在(0,0)處創建一個表示子彈的舉行，再設置正確的位置 self.rect = pygame.Rect(0,0,ai_settings.bullet_width, ai_settings.bullet_height) self.rect.centerx = ship.rect.centerx self.rect.top = ship.rect.top #存儲用小數表示的子彈位置 self.y = float(self.rect.y) self.color = ai_settings.bullet_color self.speed_factor = ai_settings.bullet_speed_factor def update(self): """向上移動子彈""" #更新表示子彈位置的小數值 self.y -= self.speed_factor #更新表示子彈的rect的位置 self.rect.y = self.y def draw_bullet(self): """在屏幕上繪制子彈""" pygame.draw.rect(self.screen,self.color,self.rect) settings.py class Settings(): """存儲《外星人入侵》的所有設置的類""" def __init__(self): """初始化游戲的設置""" #屏幕設置 self.screen_width = 1200 self.screen_height = 800 self.bg_color = (230,230,230) #飛船的設置 self.ship_speed_factor = 1.5 #子彈設置 self.bullet_speed_factor = 1 self.bullet_width = 3 self.bullet_height = 15 self.bullet_color = 60,60,60 ship.py import pygame class Ship(): def __init__(self,ai_settings,screen): """初始化飛船并設置其初始位置""" self.screen = screen self.ai_settings = ai_settings #加載飛船圖像并獲取其外接矩形 self.image = pygame.image.load('images/ship.bmp') self.rect = self.image.get_rect() self.screen_rect = screen.get_rect() #將每艘新飛船放在屏幕底部中央 self.rect.centerx = self.screen_rect.centerx self.rect.bottom = self.screen_rect.bottom #在飛船的屬性center中存儲小數值 self.center = float(self.rect.centerx) #移動標志 self.moving_right = False self.moving_left = False def update(self): """根據移動標志調整飛船的位置""" #更新飛船的center值，而不是rect if self.moving_right and self.rect.right < self.screen_rect.right: self.center += self.ai_settings.ship_speed_factor if self.moving_left and self.rect.left > 0: self.center -= self.ai_settings.ship_speed_factor #根據self.center更新rect對象 self.rect.centerx = self.center def blitme(self): """在指定位置繪制飛船""" self.screen.blit(self.image,self.rect)