save project

snake.py

@@ -10,29 +10,49 @@ 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')
 a = [(180,90),(180,120),(210,120),(x,y)]
-
+head = right
+w = "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 w != "left":
+                head = right
+                w = "right"
+            if event.key == locals.K_LEFT and w != "right":
+                head = left
+                w = "left"
+            if event.key == locals.K_UP and w != "down":
+                head = up
+                w = "up"
+            if event.key == locals.K_DOWN and w != "up":
+                head = down
+                w = "down"
+    if w == "right":
         x += 30
+    elif w == "left":
+        x -= 30
+    elif w == "up":
+        y -= 30
+    else:
+        y +=30
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
     a.append((x,y))
     a.pop(0)
-    screen.blit(right, (a[-1]))
+    screen.blit(head, (a[-1]))
     
     for i in range(len(a)-1):
         screen.blit(body,a[i])
-    # screen.blit(body, (210, 120))
-    # screen.blit(body, (180, 120))
-    # screen.blit(body, (180, 90))
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面