save project

snake.py

@@ -14,21 +14,52 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.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')
+
+setheading = "right"
+
+head = right
 
 
 posxy = [(180,90),(180,120),(210,120),(x,y)]
 posxy = [(180,90),(180,120),(210,120),(x,y)]
 
 
 while True:
 while True:
-    x+=30
-    posxy.append((x,y))
-    posxy.pop(0)
+    
     for event in pygame.event.get():
     for event in pygame.event.get():
         if event.type == locals.QUIT:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             # 接收到退出事件后退出程序
             exit()
             exit()
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_RIGHT and setheading != "left":
+                setheading = "right"
+                head = right
+            if event.key == locals.K_LEFT and setheading != "right":
+                setheading = "left"
+                head = left
+            if event.key == locals.K_UP and setheading != "down":
+                setheading = "up"
+                head = up
+            if event.key == locals.K_DOWN and setheading != "up":
+                setheading = "down"
+                head = down
+    
+    if setheading == "right":
+        x+=30
+    if setheading == "left":
+        x-=30
+    if setheading == "up":
+        y-=30
+    if setheading == "down":
+        y+=30
+
+    posxy.append((x,y))
+    posxy.pop(0)    
+    
     # 将背景图画上去
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
     # 将贪吃蛇画上去
-    screen.blit(right, posxy[-1])
+    screen.blit(head, posxy[-1])
    
    
     # 将贪吃蛇的身体画上去
     # 将贪吃蛇的身体画上去
     screen.blit(body, posxy[2])
     screen.blit(body, posxy[2])