save project

snake.py

@@ -12,24 +12,52 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
+left = pygame.image.load('left.png')
+FPS = pygame.time.Clock()
 x,y = 240,120
 snakeList = [(180,90),(180,120),(210,120),(x,y)]
+setheading = "right"
+set_head = right
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-    x += 30
+    if event.type == locals.KEYDOWN:
+        if event.key == locals.K_RIGHT and setheading != 'left':
+            setheading == 'right'
+            set_head = right
+        if event.key == locals.K_LEFT and setheading != 'right':
+            setheading == 'left'
+            set_head = left            
+        if event.key == locals.K_UP and setheading != 'down':
+            setheading == 'up'
+            set_head = right
+        if event.key == locals.K_DOWN and setheading != 'up':
+            setheading == 'down'
+            set_head = down
+    if setheading == "right":
+        x += 30
+    elif setheading == "left":
+        x -= 30
+    if setheading == "up":
+        x -= 30
+    if setheading == "down":
+        x += 30
+        
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
     snakeList.pop(0)
     snakeList.append((x,y))
-    screen.blit(right,(x,y))
+    screen.blit(set_head,(x,y))
     # 将贪吃蛇的身体画上去
     for i in range (len(snakeList)-1):
         screen.blit(body, snakeList[i])
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面
-    pygame.display.update()
\ No newline at end of file
+    pygame.display.update()
+    FPS.tick(3)
\ No newline at end of file