无法在pygame中移动捕手角色

Question

试图制作一个让我的接球手接住棒球的游戏。如果棒球被接住，则会在屏幕顶部随机出现一个新棒球。做出更改后，我似乎无法移动捕手。该游戏是通过python和pygame制作的。catch.pyimport sysimport pygamefrom pygame.sprite import Groupfrom settings import Settingsfrom catcher import Catcherfrom baseball import Baseballimport game_functions as gfdef run_game():    """Initializes the game, screen, and settings."""    pygame.init()    ai_settings = Settings()    screen = pygame.display.set_mode((ai_settings.screen_width, ai_settings.screen_height))    pygame.display.set_caption("Catch")    catcher = Group()    baseball = Group()    while True:        gf.check_events(catcher)        gf.update_catcher(ai_settings, screen, catcher)        gf.update_baseball(ai_settings, screen, catcher, baseball)        gf.update_screen(ai_settings, screen, catcher, baseball)run_game()baseball.pyimport pygamefrom pygame.sprite import Spriteclass Baseball(Sprite):    """A class to represent a baseball."""    def __init__(self, ai_settings, screen):        super().__init__()        self.screen = screen        self.ai_settings = ai_settings        # Load the baseball image and set its rect attribute.        self.image = pygame.image.load('images/baseball.bmp')        self.rect = self.image.get_rect()        # Start each new baseball at a random position at the top of the screen.        self.rect.x = self.rect.width        self.rect.y = self.rect.height         # Store the alien's exact position.        self.x = float(self.rect.x)        self.y = float(self.rect.y)    def blitme(self):        """Draw the baseball at tis current location."""        self.screen.blit(self.image, self.rect)    def update(self):        """Dropping the baseball."""        self.y += self.ai_settings.baseball_drop_speed        self.rect.y = self.ycatcher.py

Answer 1

问题是它catcher是Group而不是的一个实例Catcher(Sprite)：

catcher = Group()

while True:

   check_events(catcher)

这导致属性moving_right和分别moving_left设置为Group对象。check_keydown_eventscheck_keyup_events

您必须更改以下对象的属性Group：

def check_keydown_events(event, catcher):

    """Respond to keypresses."""

    if event.key == pygame.K_RIGHT:

        for c in catcher:

            c.moving_right = True

    elif event.key == pygame.K_LEFT:

        for c in catcher:

            c.moving_left = True

    elif event.key == pygame.K_q:

        sys.exit()

def check_keyup_events(event, catcher):

    """Respond to key releases."""

    if event.key == pygame.K_RIGHT:

        for c in catcher:

            c.moving_right = False

    elif event.key == pygame.K_LEFT:

        for c in catcher:

            c.moving_left = False