功能无法正常工作，python，pygame [重复]

Question

它没有显示任何错误，只是在显示底部显示空白而不是 printng 开始

import pygame
import time

pygame.init()

black = (0,0,0)
white = (255,255,255)

Display = pygame.display.set_mode((800,600))
pygame.display.set_caption('fitness')

font = pygame.font.SysFont(None,200)


def message_to_screen(msg,color):
    screen_text = font.render(msg,True,color)
    Display.blit(screen_text, [800/2, 600/2])

exercises =["pelvic shift","hanging","single leg hopping","puppy pose","side strech","low lunge                                                                               arcs",  "cobra strech","jogging,skipping","vertical bends","standing strechs","side bends","swimming","toe lifts","land swimming" ,"legs up alternate", "leg kicks" , "wake up stretchinggutes and hip bridges","forward spine stretch","cat camel back stetch","mermaid stretch","cycling","jump squats","cobra stretch","downward facing dog"  ,   "bird dog", "inversion table exercise", "surya namaskars" , "side planks"]             


def exerciseLoop():  
    for x in exercises:
        for number_of_exercise in range(1,29):   
            z = exercises.index(x)
            if number_of_exercise == (z+1):
                final={}
                final.update({number_of_exercise:x})
                message_to_screen("start",black)
                clock = pygame.time.Clock()
                FPS = 30
                clock.tick(FPS)
                Display.fill(white)
                pygame.display.update()
    

exerciseLoop()

Answer 1

白色画在文字上方。你需要先把它涂成白色，然后再写文字：

import pygame
import time

pygame.init()

black = (0,0,0)
white = (255,255,255)

Display = pygame.display.set_mode((800,600))
pygame.display.set_caption('fitness')

font = pygame.font.SysFont(None,200)


def message_to_screen(msg,color):
    screen_text = font.render(msg,True,color)
    Display.blit(screen_text, [800/2, 600/2])

exercises =["pelvic shift","hanging","single leg hopping","puppy pose","side strech","low lunge                                                                               arcs",  "cobra strech","jogging,skipping","vertical bends","standing strechs","side bends","swimming","toe lifts","land swimming" ,"legs up alternate", "leg kicks" , "wake up stretchinggutes and hip bridges","forward spine stretch","cat camel back stetch","mermaid stretch","cycling","jump squats","cobra stretch","downward facing dog"  ,   "bird dog", "inversion table exercise", "surya namaskars" , "side planks"]             


def exerciseLoop():  
    for x in exercises:
        for number_of_exercise in range(1,29):   
            z = exercises.index(x)
            if number_of_exercise == (z+1):
                final={}
                final.update({number_of_exercise:x})
                Display.fill(white)
                message_to_screen("start",black)
                clock = pygame.time.Clock()
                FPS = 30
                clock.tick(FPS)
                pygame.display.update()
    

exerciseLoop()

Answer 2

您必须在应用程序循环中处理事件。分别见pygame.event.get()pygame.event.pump()：

对于游戏的每一帧，您都需要对事件队列进行某种调用。这可确保您的程序可以在内部与操作系统的其余部分进行交互。

def exerciseLoop():  
     
    clock = pygame.time.Clock()
    FPS = 30
    run = True
    while run:
        clock.tick(FPS)
        for event in pygame.event.get(): 
            if event.type == pygame.QUIT:
                run = False

        for x in exercises:
            for number_of_exercise in range(1,29):  
                
                z = exercises.index(x)
                if number_of_exercise == (z+1):
                    final={}
                    final.update({number_of_exercise:x})  
                
        Display.fill(white)
        message_to_screen("start",black)
                
        pygame.display.update()
    
exerciseLoop()

典型的 PyGame 应用程序循环必须：

• 通过pygame.event.pump() 或pygame.event.get() 处理事件。
• 根据输入事件和时间（分别为帧）更新游戏状态和对象位置
• 清空整个显示或绘制背景
• 绘制整个场景（blit所有对象）
• 通过pygame.display.update() 或pygame.display.flip() 更新显示