save project

snake.py

@@ -10,11 +10,15 @@ 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')
 x,y = 0,0
-position = [(180,90),(180, 120),(210, 120),(x,y)]
-
+position = [(0,0),(0, 0),(0, 0),(x,y)]
+heading='right'
+head=right
 fps = pygame.time.Clock()
 while True:
 
@@ -22,13 +26,34 @@ while True:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-    # 将背景图画上去
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_DOWN and heading != 'up':
+                heading = 'down'
+            if event.key == locals.K_UP and heading != 'down':
+                heading = 'up'
+            if event.key == locals.K_LEFT and heading != 'right':
+                heading = 'left'
+            if event.key == locals.K_RIGHT and heading != 'left':
+                heading = 'right'
+    if heading == 'right':
         x += 30
+        head=right
+    if heading == 'left':
+        x -= 30
+        head=left
+    if heading == 'up':
+        y -= 30
+        head=up
+    if heading == 'down':
+        y += 30
+        head=down
+    # 将背景图画上去
+
     position.append((x,y))
     position.pop(0)
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, (x,y))
+    screen.blit(head, (x,y))
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body,position[i])