save project

snake.py

@@ -11,10 +11,16 @@ 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=240,120
 a=[(180,90),(180,120),(210,120),(240,120)]
+b='right'
+snake_head = right
 
 
 
@@ -23,7 +29,30 @@ while True:
         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 b != 'left':
+                b='right'
+                snake_head=right
+            if event.key == locals.K_LEFT and b != 'right':
+                b='left'
+                snake_head=left
+            if event.key == locals.K_UP and b != 'down':
+                b='up'
+                snake_head=up
+            if event.key == locals.K_DOWN and b != 'up':
+                b='down'
+                snake_head=down
+    
+
+    if b == 'right':
+        x+=30
+    elif b == 'left':
+        x-=30
+    elif b == 'up':
+        y-=30
+    else:
+        y+=30
     a.append((x,y))
     a.pop(0)
 
@@ -31,7 +60,7 @@ while True:
     screen.blit(background, (0, 0))
 
     # 将贪吃蛇画上去
-    screen.blit(right, a[-1])
+    screen.blit(snake_head, a[-1])
     for i in range(len(a)-1):
         screen.blit(body,a[i])
     # 将贪吃蛇的身体画上去