import sys
import pygame
from ship import Ship
from settings import Settings
from bullet import Bullet
from alien import Alien
class Alieninvasion:
"""overall class to manage game assets and behavior"""
def __init__(self):
"""initializing the game, and create game resources"""
pygame.init()
self.settings = Settings()
self.screen = pygame.display.set_mode((
self.settings.screen_width,
self.settings.screen_height))
pygame.display.set_caption("Alien Invasion")
self.ship = Ship(self)
self.bullets = pygame.sprite.Group()
self.aliens = pygame.sprite.Group()
self._creat_fleet()
def _creat_fleet(self):
alien = Alien(self)
self.aliens.add(alien)
def run_game(self):
"""start the main loop for the game"""
while True:
self._check_events()
self.bullets.update()
self.ship.update()
self._update_bullets()
print(len(self.bullets))
self._update_screen()
def _check_events(self):
# respond to keypresses and mouse events
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
elif event.type == pygame.KEYDOWN:
self._check_keydown_events(event)
elif event.type == pygame.KEYUP:
self._check_keyup_events(event)
def _check_keydown_events(self, event):
if event.key == pygame.K_RIGHT:
self.ship.moving_right = True
elif event.key == pygame.K_LEFT:
self.ship.moving_left = True
elif event.key == pygame.K_q:
sys.exit()
elif event.key == pygame.K_SPACE:
self._fire_bullet()
def _check_keyup_events(self, event):
if event.key == pygame.K_RIGHT:
self.ship.moving_right = False
elif event.key == pygame.K_LEFT:
self.ship.moving_left = False
def _fire_bullet(self):
if len(self.bullets)< self.settings.bullets_allowed:
new_bullet = Bullet(self)
self.bullets.add(new_bullet)
def _update_bullets(self):
self.bullets.update()
for bullet in self.bullets.copy():
if bullet.rect.bottom <= 0:
self.bullets.remove(bullet)
def _update_screen(self):
# update images on screen
self.screen.fill(self.settings.bg_color)
self.ship.blitme()
for bullet in self.bullets.sprites():
bullet.draw_bullet()
self.aliens.draw(self.screen)
# watch for keyboard and mouse events.
pygame.display.flip()
def _create_fleet(self):
"""create the fleet of aliens"""
# create an alien and find the number of aliens in a row
# spcing between each alien is queal to one alien width
alien = Alien(self)
alien_width, alien_height = alien.rect.size
available_space_x = self.settings.screen_width - (2 * alien_width)
number_aliens_x = available_space_x // (2 * alien_width)
# determine the number of rwos of aliens that fit
ship_height = self.rect.height
available_space_y = (
self.settings.screen_height - (3 * alien_height) - ship_height)
number_rows = available_space_y // (2 * alien_height)
# create the full fleet of aliens
for rwo_number in range(number_rows):
# creating the first row of aliens
for alien_number in range(number_aliens_x):
self.create_alien(alien_number)
def _create_screen(self, alien_number):
alien = Alien(self)
alien_width, alien_height = alien.rect.size
alien.x = alien_width + 2 * alien_width * alien_number
alien.rect.x = alien.x
alien.rect.y = alien.rect.height + 2 * alien.rect.height * row_number
self.aliens.add(alien)
if __name__ == '__main__':
# make a game instance and run the game.
ai = Alieninvasion()
ai.run_game()
最后报错是：
TypeError: pygame.sprite.Sprite.add() argument after * must be an iterable, not Alieninvasion
懵逼了。。。
