save project

snake.py

@@ -8,11 +8,18 @@ pygame.init()
 screen = pygame.display.set_mode((660, 480))
 a = pygame.time.Clock()
 
+
 # 背景
 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')
+left = pygame.image.load('left.png')
+down = pygame.image.load('down.png')
+
+setheading = 'right'
+snake_head=right
 
 
 x,y = 240,120 
@@ -22,13 +29,33 @@ 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 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_UP and setheading != 'down':
+                setheading = 'up'
+                snake_head=up
+            if 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
     xy.append((x,y))
     xy.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, xy[-1])
+    screen.blit(snake_head, xy[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(xy)-1):
         screen.blit(body,xy[i])