通常在多玩家的游戏中,每个玩家都会有自己的得分,最高分数会成为该游戏的最佳记录。这一篇,学习下如何记录最高得分:(为了简化代码,本文采用文件方式,仅记录本机得分,明白原理后,可以将得分保存在云端或数据库中,就可能支持多玩家了)。
首先要在settings.py中新建一个常量:
HIGH_SCORE_FILE = "../data/high_score.txt"
目录结构参考下图:
然后main.py中,定义一个load_data函数,加载这个文件的内容:
1 def load_data(self):
2 # 加载历史最高分
3 file_path = path.join(self.dir, HIGH_SCORE_FILE)
4 if path.exists(file_path):
5 with open(file_path, "r") as f:
6 try:
7 self.high_score = int(f.read())
8 except:
9 self.high_score = 0
注意这里要做好异常处理(因为文件有可能被锁定,或不存在)
初始化时,调用该函数,加载历史最高得分:
1 def __init__(self):
2 pg.init()
3 pg.mixer.init()
4 self.screen = pg.display.set_mode(SIZE)
5 pg.display.set_caption(TITLE)
6 self.clock = pg.time.Clock()
7 self.running = True
8 self.playing = False
9 self.font_name = FONT_NAME
10 # 初始化最高得分
11 self.high_score = 0
12 self.score = 0
13 self.dir = path.dirname(__file__)
14 # 加载历史最高得分
15 self.load_data()
启动画面,加上历史最高得分显示:
1 def show_start_screen(self):
2 self.screen.fill(BG_COLOR)
3 self.draw_text(TITLE, 48, WHITE, WIDTH / 2, HEIGHT * 0.4)
4 self.draw_text("Arrows to move, Space to jump", 22, WHITE, WIDTH / 2, HEIGHT * 0.55)
5 self.draw_text("Press a key to play", 20, WHITE, WIDTH / 2, HEIGHT * 0.7)
6 # 显示最高得分
7 self.draw_text("High Score: " + str(self.high_score), 20, WHITE, WIDTH / 2, 15)
8 pg.display.update()
9 self.wait_for_key()
游戏结束时,如果出现得分新记录,保存到文件中:
1 def show_go_screen(self):
2 self.screen.fill(BG_COLOR)
3 self.draw_text("GAME OVER", 48, WHITE, WIDTH / 2, HEIGHT * 0.4)
4 self.draw_text("Score: " + str(self.score), 22, WHITE, WIDTH / 2, HEIGHT * 0.55)
5 self.draw_text("Press a key to play again", 20, WHITE, WIDTH / 2, HEIGHT * 0.7)
6 # 如果得分出现新记录,保存下来
7 if self.score > self.high_score:
8 self.high_score = self.score
9 self.draw_text("New High Score: " + str(self.high_score), 28, WHITE, WIDTH / 2, 25)
10 with open(path.join(self.dir, HIGH_SCORE_FILE), "w") as f:
11 f.write(str(self.high_score))
12 else:
13 self.draw_text("High Score: " + str(self.high_score), 20, WHITE, WIDTH / 2, 15)
14
15 pg.display.update()
16 self.wait_for_key()
github源码地址: https://github.com/yjmyzz/kids-can-code/tree/master/part_08