save project

snake.py

@@ -52,13 +52,14 @@ while True:
         y -= 30
     else:
         y += 30
-
-    if x == apple_x and y == apple_y:
-        apple_x = random.randint(0,660)
-        apple_y = random.randint(0,480)
-
     position.append((x, y))
-    position.pop(0)
+    if x == apple_x and y == apple_y:
+        num1 = random.randint(0,21)
+        num2 = random.randint(0,15)
+        apple_x = 30*num1
+        apple_y = 30*num2
+    else:
+        position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去