save project

1.py

@@ -23,28 +23,30 @@ while True:
             # 接收到退出事件后退出程序
             exit()
         if event.type==locals.KEYDOWN:
-            if event.key==locals.K_UP :
+            if event.key==locals.K_UP and setheading!='down':
                 setheading='up'
                 snake_head=up
-            if event.key==locals.K_DOWN:
+                y-=30
+                position.append((x,y))
+                position.pop(0)
+            if event.key==locals.K_DOWN and setheading!='up':
                 setheading='down'
                 snake_head=down
-            if event.key==locals.K_RIGHT :
+                y+=30
+                position.append((x,y))
+                position.pop(0)
+            if event.key==locals.K_RIGHT and setheading!='left':
                 setheading='right'
                 snake_head=right
-            if event.key==locals.K_LEFT:
+                x+=30
+                position.append((x,y))
+                position.pop(0)
+            if event.key==locals.K_LEFT and setheading!='right':
                 setheading='left'
                 snake_head=left
-    if setheading=='right' and setheading!='left':
-        x+=30
-    if setheading=='left' and setheading!='right':
-        x-=30
-    if setheading=='down' and setheading!='up':
-        y+=30
-    if setheading=='up' and setheading!='down':
-        y-=30
-    position.append((x,y))
-    position.pop(0)
+                x-=30
+                position.append((x,y))
+                position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的身体画上去

snake.py

@@ -35,13 +35,13 @@ while True:
             if event.key==locals.K_LEFT:
                 setheading='left'
                 snake_head=left
-    if setheading=='right':
+    if setheading=='right' and setheading!='left':
         x+=30
-    if setheading=='left':
+    if setheading=='left' and setheading!='right':
         x-=30
-    if setheading=='down':
+    if setheading=='down' and setheading!='up':
         y+=30
-    if setheading=='up':
+    if setheading=='up' and setheading!='down':
         y-=30
     position.append((x,y))
     position.pop(0)
@@ -56,4 +56,4 @@ while True:
     screen.blit(food, (360, 300))
     # 刷新画面
     pygame.display.update()
-    FPSclock.tick(3)
\ No newline at end of file
+    FPSclock.tick(0.01)
\ No newline at end of file