save project

snake.py

@@ -14,13 +14,38 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
 x, y = 240, 120
 position = [(180,90), (180,120), (210,120), (x, y)]
+setheading = "right"
+snake_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()
+        if event.type == locals.KEYDOWN:
+            if event.key ==locals.K_RIGHT and setheading != "left":
+                setheading = 'right'
+                snake_head = right
+            if event.key ==locals.K_LEFT and setheading != "right":
+                setheading = 'left'
+                snake_head = left
+            if event.key ==locals.K_UP and setheading != "down":
+                setheading = 'up'
+                snake_head = up
+            if event.key ==locals.K_DOWN and setheading != "up":
+                setheading = 'down'
+                snake_head = down
+        if setheading == "right":
+            x += 30
+        if setheading == "left":
+            x -= 30
+        if setheading == "up":
+            y -= 30
+        else:
             x += 30
     position.append((x, y))
     position.pop(0)
@@ -31,7 +56,7 @@ while True:
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body, position[i])
-    screen.blit(right, position[-1])
+    screen.blit(snake_head, position[-1])
     screen.blit(body, (210, 120))
     screen.blit(body, (180, 120))
     screen.blit(body, (180, 90))