save project

snake.py

@@ -7,19 +7,47 @@ pygame.init()
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
 FPSCLOCK = pygame . time.Clock()
+
 # 背景c
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down= pygame.image.load('down.png')
 x,y=240,120
 p=[(180,90),(180,120),(210,120),(x,y)]
+
+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()
-    x+=30
+        elif 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":
+        x -=30
+    else:
+        y += 30
     p.append((x,y))
     p.pop(0)
     # 将背景图画上去