save project

snake.py

@@ -12,23 +12,51 @@ FPSCLOCK = pygame.time.Clock()
 # 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 = 240,120
 position = [(180,90),(180,120),(210,120),(x,y)]
+snake_head = right
+setheading = "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 += 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_DOWN and setheading != "up":
+                setheading = "down"
+                snake_head = down
+            if event.key == locals.K_UP and setheading != "down":
+                setheading = "up"
+                snake_head = up
+
+    if setheading == "right":
+        x += 30
+    elif setheading == "left":
+        x -= 30
+    elif setheading == "down":
+        y += 30
+    elif setheading == "up":
+        y -= 30
+    
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right,position[-1])
+    screen.blit(snake_head,position[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body,position[i])