save project

snake.py

@@ -13,16 +13,44 @@ p = [(210,120),(180, 120),(180, 90),(x,y)]
 # 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')
 
+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'
+                snake_head = right
+            elif event.key == locals.K_LEFT and setheading !="right":
+                setheading = 'left'
+                snake_head = left
+            elif event.key == locals.K_UP and setheading !="down":
+                setheading = 'up'
+                snake_head = up
+            elif 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
+    elif setheading ==  "down":
+        y += 30
 
-    x+=30
     p.append((x,y))
     p.pop(0)
 
@@ -30,7 +58,7 @@ while True:
     # 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
     # screen.blit(body, (210, 120))
     # screen.blit(body, (180, 120))