无法从组中移除单个精灵

Question

现在我正在尝试做两件事，包括从组中移除精灵。我想完成两件事：

1. 首先，我有子弹和电源。一旦我的子弹和我的电源相撞，我希望那些特定的子弹和电源被删除
2. 第二，如果我的电源在一段时间后没有被击中，那么我希望他们被删除

目标1的问题：一旦我的子弹与电源相撞，我所有的子弹都会冻结。
目标2的问题：我的所有通电都被移除，而不是一次一个通电

这是我的子弹课：

class Bullet(Image):

    def __init__(self, screen_size, width, height, filename, color = (255, 0, 0)):

        super().__init__(screen_size, width, height, filename, color = (255, 0, 0))

    def checkCollision(self, powerup):

        return pygame.sprite.collide_mask(self, powerup)

    def removeBullet(self, powerup):
        if self.checkCollision(powerup):
            self.kill()

    def update(self, powerup):
        self.rect.centerx += 3
        self.removeBullet(powerup)

这是我的通电课程

class PowerUp(Image):

    def __init__(self, screen_size, width, height, filename,  color = (255, 0, 0)):

        super().__init__(screen_size, width, height, filename, color = (255, 0 , 0))


        _centerx = random.randint(20, 1100) # <-- local variable _centerx (don't need it in other methods)
        _centery = random.randint(20, 700) # <-- local variable _centery (don't need it in other methods)
        self.radius = 10
        self.rect = pygame.Rect(_centerx-self.radius,
                                _centery-self.radius,
                                self.radius*2, self.radius*2)

    def update(self):

        pass

这里是我管理一切的地方：

class GameScreen(SceneBase):

    def __init__(self):
        SceneBase.__init__(self)

        self.my_font = pygame.font.SysFont("Arial", 50)

        self.bullets_group = pygame.sprite.Group()
        self.powerup_group = pygame.sprite.Group()
        self.player_paddle = classes.PlayerPaddle(screen_size, 20, 100, "naruto.png", self.bullets_group)
        self.ai_paddle = classes.AIPaddle(screen_size, 20, 100, "naruto.png")
        self.pong = classes.Pong(screen_size, 20, 20, "pokeball.png")

        self.now1 = pygame.time.get_ticks()
        self.now2 = pygame.time.get_ticks()


    def ProcessInput(self, events, pressed_keys):
        for event in events:
            self.player_paddle.handle_event(event)

    def Update(self):
        self.player_paddle.update() 
        self.ai_paddle.update(self.pong, self.player_paddle) 
        self.pong.update(self.player_paddle, self.ai_paddle)

        for powerup in self.powerup_group:
            self.bullets_group.update(powerup)
        self.powerup_group.update()


        # if someone reaches a score of 2, then exit the game 
        if self.player_paddle.score == 2 or self.ai_paddle.score == 2:
            SceneBase.is_game_over = True 
            self.SwitchToScene(GameOverScreen())

        time_difference1 = pygame.time.get_ticks() - self.now1
        time_difference2 = pygame.time.get_ticks() - self.now2

        if time_difference1 >= 2000:
            self.powerup_group.add(classes.PowerUp(screen_size, 40, 40, "ramen.png"))
            self.now1 = pygame.time.get_ticks()

        for powerup in self.powerup_group:
            if time_difference2 >= 5000:
                self.powerup_group.remove(powerup)

如果我的PlayerPaddle类，如果我点击一个键，子弹就会从中发射出来。但是，项目符号并没有向右移动（就像我在项目符号的更新函数中要求它做的那样）

def handle_event(self, event):
    if event.type == pygame.KEYDOWN:
        if event.key == pygame.K_UP:
            self.direction = -1
        elif event.key == pygame.K_DOWN:
            self.direction = 1      
        elif event.key == pygame.K_LEFT:
            self.turnLeft()
        elif event.key == pygame.K_RIGHT:
            self.turnRight()
        elif event.key == pygame.K_u:
            bullet = Bullet(screen_size, 25, 25, "naruto.png", color = (255, 0 , 0))
            bullet.rect.centerx = self.rect.centerx
            bullet.rect.centery = self.rect.centery 

            self.bullet_group.add(bullet)

Answer 1

目标2：你使用相同的定时器为所有的电源

 time_difference2 = pygame.time.get_ticks() - self.now2 

 ...

 if time_difference2 >= 5000:

所以它可以同时移除所有的电源

每次开机都需要自己的定时器。我使用名称kill_time和current_time+5000

    time_difference1 = pygame.time.get_ticks() - self.now1

    #  -

    current_time = pygame.time.get_ticks()

    if time_difference1 >= 2000:
        powerup = classes.PowerUp(screen_size, 40, 40, "ramen.png")
        powerup.kill_time = current_time + 5000
        self.powerup_group.add(power)
        self.now1 = pygame.time.get_ticks()

    #   

    current_time = pygame.time.get_ticks()

    for powerup in self.powerup_group:
        if powerup.kill_time <= current_time:
            self.powerup_group.remove(powerup)