import sys
import pygame
from settings import Settings
from ship import Ship


def run_game():
    # 初始化pygame、设置和屏幕对象
    pygame.init()
    ai_settings = Settings()
    screen = pygame.display.set_mode((ai_settings.screen_width, ai_settings.screen_height))

    pygame.display.set_caption("Alien Invasion")
    ship = Ship(screen)

    # 开始游戏的主循环
    while True:

        # 监视键盘和鼠标事件
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                sys.exit()
        # 每次循环时都重绘屏幕
        screen.fill(ai_settings.bg_color)
        ship.blitme()

        # 让最近绘制的屏幕可见
        pygame.display.flip()

run_game()

class Settings():
    # 存储《外星人入侵》的所有设置的类

    def __init__(self):
        """初始化游戏的设置"""
        # 屏幕设置
        self.screen_width = 500
        self.screen_height = 300
        self.bg_color = (0, 0, 255)

import pygame

class Ship():

    def __init__(self, screen):
        """初始化飞船并设置其初始位置"""
        self.screen = screen

        # 加载飞船图像并获取其外接矩形
        self.image = pygame.image.load(‘images/myplane2.bmp‘)
        self.rect = self.image.get_rect()
        self.screen_rect = screen.get_rect()

        # 将每艘新飞船放在屏幕底部*
        self.rect.centerx = self.screen_rect.centerx
        self.rect.bottom = self.screen_rect.bottom

    def blitme(self):
        """在指定位置绘制飞船"""
        self.screen.blit(self.image, self.rect)