save project

snake.py

@@ -10,6 +10,9 @@ screen = pygame.display.set_mode((660, 480))
 # 背景
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 
@@ -18,32 +21,35 @@ position=[(180,90),(180,120),(210,120),(x,y)]
 FPSCLOCK=pygame.time.Clock()
 
 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'
-            x+=30
-        if event.key==locals.K_LEFT and setheading !='right':
-            setheading='left'
-            x-=30
-        if event.key==locals.K_UP and setheading !='down':
-            setheading='up'
-            y+=30
-        if event.key==locals.K_DOWN and setheading !='up':
-            setheading='down'
-            y-=30
-        if setheading='right':
-            x+=30
-        elif setheading='up':
-            y+=30
-        elif setheading='down':
-            y-=30
-    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':
+                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
+    if setheading=='down':
+        y+=30
+        
     position.append((x,y))
     position.pop(0)          
     # 将背景图画上去