save project

snake.py

@@ -13,6 +13,12 @@ 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')
+
+setheading='right'
+snake_head=right
 
 x,y=240,120
 q=[(180,90),(180,120),(210,120),(x,y)]
@@ -21,13 +27,34 @@ while True:
         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'
+                snake_head=right
+            if event.key == locals.K_LEFT and setheading !="right":
+                snake_head=left
+                setheading = '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
+    elif setheading = 'left':
+      x-=30
+    elif setheading = 'up':
+        y-=30
+    else:
+        y+=30
     q.append((x,y))
     q.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
+
     # 将贪吃蛇画上去
-    screen.blit(right, (x, y))
+    screen.blit(snake_head, (x, y))
     # 将贪吃蛇的身体画上去
     for i in range(len(q)-1):
         screen.blit(body,q[i])
@@ -38,5 +65,3 @@ while True:
     FPSCLOCK.tick(9)
 
 
-
-