save project

snake.py

@@ -12,14 +12,47 @@ 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()
-        x = x+30
+        elif 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 = 'right'
+                snake_head = left
+            if event.key == locals.K_UP and setheading!='down':
+                setheading = 'up'
+                snake_head =up
+
+            if event.key == locals.K_UP and setheading!='down':
+                setheading = 'down'
+                snake_head = down
+
+    if setheading == 'right':
+        x+=30
+    elif setheading == 'left':
+        x-=30
+    elif setheading == 'up':
+        y-=30
+    else:
+        y+30
+
+
+        
+    
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去
@@ -34,4 +67,4 @@ while True:
     screen.blit(food, (360, 300))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
\ No newline at end of file
+    FPSCLOCK.tick(3)