```python
import sys # 用以退出程序
import pygame # import库
from pygame.sprite import Group
bg_color = 230,230,230
class Ship:
def __init__(self,screen):
self.screen = screen
self.image = pygame.image.load('images/ship.bmp').convert_alpha()
self.rect = self.image.get_rect()
self.screen_rect = screen.get_rect()
self.rect.midbottom = self.screen_rect.midbottom
self.moving_right = False
self.center_x = float(self.rect.centerx)
self.center_y = float(self.rect.centerx)
self.ship_speed_factor = 5
self.bullets_allowed = 10
def blitme(self):
self.screen.blit(self.image,self.rect)
def update(self):
if self.moving_right and self.rect.right < self.screen_rect.right:
self.center_x += self.ship_speed_factor
self.rect.centerx = self.center_x
class Bullet(pygame.sprite.Sprite):
def __init__(self,screen,ship):
pygame.sprite.Sprite.__init__(self) # 初始化
self.screen = screen
self.bullet_width = 3
self.bullet_height = 10
self.bullet_color = 6,60,160
self.speed_factor = 10 # 设置速度
self.rect = pygame.Rect(0, 0, self.bullet_width, self.bullet_height) # 创建一个矩形实例，括号里是子弹的大小，和初始位置
self.rect.top = ship.rect.top # 将子弹与飞船的头部位置重叠在一起
self.rect.centerx = ship.rect.centerx
self.y = float(self.rect.y)
def update(self):
self.y -= self.speed_factor
self.rect.centery = self.y
def draw_bullet(self): # 绘制子弹
pygame.draw.rect(self.screen,self.bullet_color,self.rect)
def remove_bullet(bullets): # 用来删除消失在界面的子弹。
for i in bullets.copy():
if i.rect.bottom <= 0:
bullets.remove(i)
def run_game():
pygame.init() # 初始化
screen = pygame.display.set_mode((1000, 800)) # 返回一个屏幕 此时出现一个窗口
pygame.display.set_caption("ship") # 设置窗口的标题
bullets = Group() # 一个子弹组
flyboat = Ship(screen)
while True: # 死循环
for event in pygame.event.get(): # 检测用户的键盘鼠标等输入
if event.type == pygame.QUIT: # 此处仅检测是否退出
sys.exit() # 退出
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_RIGHT:
flyboat.moving_right = True
elif event.key == pygame.K_SPACE:
if len(bullets) < flyboat.bullets_allowed: # 将子弹组里的子弹数与飞船限制的子弹数量做对比，
new_bullet = Bullet(screen, flyboat) # 创建bullet实例，创建一个子弹。
bullets.add(new_bullet) # 把实例添加到bullets组里面去
elif event.type == pygame.KEYUP: # key up
if event.key == pygame.K_RIGHT:
flyboat.moving_right = False
screen.fill(bg_color)
flyboat.blitme()
for i in bullets:
i.draw_bullet()
i.update()
remove_bullet(bullets)
pygame.display.flip() # 绘制一个新屏幕 并擦去旧屏幕 以形成平滑移动
run_game()
1.创建出屏幕
2.绘制飞机
3.让飞机射出子弹
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