import pygame,sys
pygame.init()#初始化操作

#保存窗口大小
width,height=600,400
screen=pygame.display.set_mode([width,height])#创建游戏窗口

#设置窗口标题
pygame.display.set_caption("愤怒的小鸟")

#加载小鸟素材
player=pygame.image.load("xiaoniao.png")

#获取图像矩形位置
rect=player.get_rect()

#声明XY运动速度的列表
speed = [3,2]

left_head = pygame.transform.flip(player,True,False)
right_head = player

#无限循环
while True:
 for event in pygame.event.get():
  if event.type ==pygame.QUIT:
   exit()
  if event.type ==pygame.KEYDOWN:
  
   if event.key == pygame.K_LEFT:
    player = left_head #小鸟的头向左
    speed=[-2,1]
   if event.key == pygame.K_RIGHT:
    player = right_head #小鸟的头向左
    speed=[2,1]
   if event.key == pygame.K_UP:
    player = left_head #小鸟的头向左
    speed=[2,-1]
   if event.key == pygame.K_DOWN:
    player = right_head #小鸟的头向左
    speed=[2,1]

 rect =rect.move(speed)
 if rect.right>width or rect.left<0:
  #将图片水平翻转    反转对象 是否水平反转 是否垂直翻转
  player = pygame.transform.flip(player,True,False)
  speed[0]=-speed[0]

 if rect.bottom>height or rect.top<0:
  speed[1]=-speed[1]

 screen.fill((255,255,255))
 screen.blit(player,rect)
 pygame.display.update()
 pygame.time.delay(10)