import pygame  # 导入pygame包
pygame.init()    # 初始化游戏
win_x = 800    # 窗口宽
win_y = 800    # 窗口高

# 创建窗口
win = pygame.display.set_mode((win_x, win_y))
# 游戏标题
pygame.display.set_caption("按下键盘不放控制")
# 背景颜色
win.fill((255, 255, 255))

# 静态小鸡
ji = pygame.image.load('image/快乐小鸡右.png')
ji_l = pygame.image.load("image/快乐小鸡.png")
jidong = ji
jix, jiy = 200, 300
win.blit(ji, (jix, jiy))
# 刷新界面
pygame.display.flip()

# 用一个变量设置是否移动，初始值为Fasle,当按下键盘某键是为Treu，便执行移动
is_move = False
x_s = 0
y_s = 0
# 循环游戏
while True:
    if is_move == True:
        win.fill((255, 255, 255))
        jix += x_s
        jiy += y_s
        win.blit(jidong, (jix, jiy))
        pygame.display.update()
    # 检测事件的发生
    for evt in pygame.event.get():
        # 判断事件类型
        if evt.type == pygame.QUIT:
            exit()
        # 判断键盘被按下事件
        elif evt.type == pygame.KEYDOWN:
            
            if evt.unicode == "w":
                is_move = True
                x_s = 0
                y_s = -1
            elif evt.unicode == "s":
                x_s = 0
                y_s = 1
                is_move = True
            elif evt.unicode == "a":
                is_move = True
                jidong = ji_l
                x_s = -1
                y_s = 0

            elif evt.unicode == "d":
                is_move = True
                jidong = ji
                x_s = 1
                y_s = 0
        elif evt.type == pygame.KEYUP:
            is_move = False

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