add apple

apple.py

@@ -0,0 +1,11 @@
+import random
+
+
+class Apple():
+    def __init__(self,settings):
+        self.x = random.randint(1, settings.cell_w - 1)
+        self.y = random.randint(1, settings.cell_h - 1)
+    
+    def spawn(self,settings):
+        self.x = random.randint(1, settings.cell_w - 1)
+        self.y = random.randint(1, settings.cell_h - 1)

game_functions.py

@@ -20,6 +20,30 @@ def check_events(settings):
                 settings.game_mode = 2
 
  
+def check_play_events(snake):
+    """检测游戏过程中的按键"""
+    for event in pygame.event.get():
+        if event.type == pygame.QUIT:
+            pygame.quit()
+            sys.exit()
+        elif event.type == pygame.KEYDOWN:
+            if event.key == pygame.K_ESCAPE:
+                pygame.quit()
+                sys.exit()
+            elif event.key == pygame.K_LEFT and not snake.direction == 'right':  #防止反向移动
+                snake.direction = 'left'
+                break
+            elif event.key == pygame.K_RIGHT and not snake.direction == 'left':
+                snake.direction = 'right'
+                break
+            elif event.key == pygame.K_UP and not snake.direction == 'down':
+                snake.direction = 'up'
+                break
+            elif event.key == pygame.K_DOWN and not snake.direction == 'up':
+                snake.direction = 'down'
+                break
+
+
 def show_start(settings, screen):
     """模式选择界面"""
     title_Font = pygame.font.Font(settings.font_name, 80)  # 设置标题字体
@@ -33,10 +57,11 @@ def show_start(settings, screen):
     presskey_rect = presskey_image.get_rect()
     presskey_rect.centerx = title_rect.centerx
     presskey_rect.top = title_rect.bottom
-    while True:
+    
     screen.fill(settings.bg_color)  # 绘制屏幕
     screen.blit(title_image, title_rect)  # 绘制标题
     screen.blit(presskey_image, presskey_rect)  # 绘制说明文字
+    while True:
         check_events(settings)  # 检测键盘
         if settings.game_mode != 0:  # 说明按了1或2，退出循环
             break
@@ -69,84 +94,75 @@ def draw_grid(settings, screen):
         pygame.draw.line(screen, (40, 40, 40), (0, y), (settings.width, y))
 
 
-def update_screen(settings, screen):
+def draw_snake(settings, screen, snake):
-    screen.fill(settings.bg_color)
-    draw_grid(settings, screen)
-
-# 绘制蛇
-
-
-def draw_snake(ai_settings, screen, snake):
     # 头部用白色
-    x = snake.coords[0]['x'] * ai_settings.cell_size
+    head_index = snake.coords[0]
-    y = snake.coords[0]['y'] * ai_settings.cell_size
+    x = head_index['x'] * settings.cell_size
+    y = head_index['y'] * settings.cell_size
     snake_head_rect = pygame.Rect(
-        x, y, ai_settings.cell_size, ai_settings.cell_size)
+        x, y, settings.cell_size, settings.cell_size)
     pygame.draw.rect(screen, (255, 255, 255), snake_head_rect)
     # 蛇身内部用浅绿，外框用深绿
-    for coord in snake.coords[1: -1]:
+    for bodies_index in snake.coords[1: -1]:
-        x = coord['x'] * ai_settings.cell_size
+        x = bodies_index['x'] * settings.cell_size
-        y = coord['y'] * ai_settings.cell_size
+        y = bodies_index['y'] * settings.cell_size
         snake_part_rect = pygame.Rect(
-            x, y, ai_settings.cell_size, ai_settings.cell_size)
+            x, y, settings.cell_size, settings.cell_size)
         pygame.draw.rect(screen, (0, 155, 0), snake_part_rect)
         snake_part_inner_rect = pygame.Rect(
-            x + 4, y + 4, ai_settings.cell_size - 8, ai_settings.cell_size - 8)
+            x + 4, y + 4, settings.cell_size - 8, settings.cell_size - 8)
         pygame.draw.rect(screen, (0, 255, 0), snake_part_inner_rect)
     # 蛇尾用浅绿
-    coord = snake.coords[-1]
+    tail_index = snake.coords[-1]
-    x = coord['x'] * ai_settings.cell_size
+    x = tail_index['x'] * settings.cell_size
-    y = coord['y'] * ai_settings.cell_size
+    y = tail_index['y'] * settings.cell_size
     snake_tail_rect = pygame.Rect(
-        x, y, ai_settings.cell_size, ai_settings.cell_size)
+        x, y, settings.cell_size, settings.cell_size)
     pygame.draw.rect(screen, (0, 255, 0), snake_tail_rect)
 
+
+def draw_apple(apple,settings,screen):
+    x = apple.x * settings.cell_size
+    y = apple.y * settings.cell_size
+    apple_rect = pygame.Rect(
+        x, y, settings.cell_size, settings.cell_size)
+    pygame.draw.rect(screen, (255, 0, 0), apple_rect)
+
+
 # 绘制游戏界面
-
+def update_screen(settings, screen, snake,apple):
-
-def update_screen(settings, screen, snake):
     screen.fill(settings.bg_color)
     draw_grid(settings, screen)
+    draw_apple(apple,settings,screen)
     # 移动蛇
-    del snake.coords[-1]  # 加蛇头
+    snake.move_head()  # 加蛇头
-    snake.update()  # 去蛇尾
+    if game_over(snake,settings):
-    if not is_game_over(settings, snake):
         settings.game_mode = -1
+    elif eat_apple(snake,apple):
+        apple.spawn(settings)
+        draw_apple(apple,settings,screen)
     else:
+        del snake.coords[-1]  # 去蛇尾
     draw_snake(settings, screen, snake)
     pygame.display.flip()
     # 暂停一下
     settings.my_clock.tick(settings.clock_frq)
 
 
-def is_game_over(settings, snake):
+def game_over(snake,settings):
     # 碰到左右墙壁
     if (snake.coords[snake.head_index]['x'] == -1 or snake.coords[snake.head_index]['x'] == settings.cell_w):
-        return False
+        return True
     # 碰到上下墙壁
     if (snake.coords[snake.head_index]['y'] == -1 or snake.coords[snake.head_index]['y'] == settings.cell_h):
-        return False
+        return True
     # 碰到自己
     if (snake.coords[snake.head_index] in snake.coords[1:]):
-        return False
         return True
+    return False
 
 
-# 检测游戏过程中的按键
+def eat_apple(snake,apple):
-def check_play_events(snake):
+    if (snake.coords[snake.head_index]['x'] == apple.x and snake.coords[snake.head_index]['y'] == apple.y):
-    for event in pygame.event.get():
+        return True
-        if event.type == pygame.QUIT:
+    return False
-            pygame.quit()
-            sys.exit()
-        elif event.type == pygame.KEYDOWN:
-            if event.key == pygame.K_ESCAPE:
-                pygame.quit()
-                sys.exit()
-            elif event.key == pygame.K_LEFT and not snake.direction == 'right':
-                snake.direction = 'left'
-            elif event.key == pygame.K_RIGHT and not snake.direction == 'left':
-                snake.direction = 'right'
-            elif event.key == pygame.K_UP and not snake.direction == 'down':
-                snake.direction = 'up'
-            elif event.key == pygame.K_DOWN and not snake.direction == 'up':
-                snake.direction = 'down'

main.py

@@ -2,6 +2,7 @@ import pygame
 from settings import Settings
 import game_functions as gf
 from snake import Snake
+from apple import Apple
 
 settings = Settings()
 # 设置屏幕
@@ -10,11 +11,13 @@ screen = pygame.display.set_mode((settings.width, settings.height))
 pygame.display.set_caption('贪吃蛇')
 # 创建蛇
 snake = Snake(settings)
+# 创建苹果
+apple = Apple(settings)
 
-
+#手动模式
 def run_game1():
     gf.check_play_events(snake)
-    gf.update_screen(settings, screen, snake)
+    gf.update_screen(settings, screen, snake,apple)
 
 
 def run_game():

settings.py

@@ -16,8 +16,9 @@ class Settings:
         self.game_mode = 0  # 游戏状态
         self.score = 0  # 游戏得分
 
-        self.clock_frq = 5  # 刷新频率
+        self.clock_frq = 3  # 刷新频率
         self.my_clock = pygame.time.Clock()
+        
         if sys.platform.startswith("linux"):
             self.font_name = pygame.font.match_font('wenquanyizenhei')
         else:

snake.py

@@ -21,7 +21,7 @@ class Snake():
     # 按常识，每次移动后，不仅仅是蛇头向前移动一个，更重要的是蛇尾也要向前移，但是在该函数中先不处理蛇尾
     # 因为如果蛇吃了食物，此时蛇尾其实并没有移动
 
-    def update(self):
+    def move_head(self):
         newHead = {}
         # 根据移动方向确定蛇头
         if self.direction == 'up':