save project

snake.py

@@ -12,18 +12,45 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
+left = pygame.image.load('left.png')
 
 x,y=240,120
 FPSCLOCK=pygame.time.Clock()
 
 position=[(180,90),(180,120),(210,120),(x,y)]
+setheading = "right"
+snake_hend=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_hend = right
+            if event.key == locals.K_LEFT and setheading != "right":
+                setheading = "left"
+                snake_hend= left
+            if event.key == locals.K_DOWN and setheading != "up":
+                setheading = "down"
+                snake_hend= down
+            if event.key == locals.K_UP and setheading != "down":
+                setheading = "up"
+                snake_hend = up
+
+    if setheading == "right":
+        x = x+30
+    if setheading == "left":
+        x = x-30
+    if setheading == "down":
+        y = y+30
+    if setheading == "up":
+        y = y-30
+    
     position.append((x,y))
     position.pop(0)
 
@@ -31,7 +58,7 @@ while True:
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
 
-    screen.blit(right, (x, y))
+    screen.blit(snake_hend, (x, y))
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body,position[i])