編碼錯誤與Python

Question

我想在python（它的一個學校任務）中編寫一個遊戲，我希望遊戲有多個屏幕，例如標題屏幕，關於屏幕和屏幕，玩遊戲。但是，爲了簡單起見，我希望所有這些屏幕都顯示在同一個窗口中。

目前，我一直在定義運行特定屏幕的命令，並告訴python在變量正確時（即用戶按下按鈕將它們帶到下一個屏幕）運行該命令。但是，我所得到的只是一個黑屏，python會立即關閉。有趣的是日誌顯示沒有任何問題，這很奇怪。

如果你能幫我修復這段代碼，那將不勝感激。

import pygame 
import random 
name = 'Squash Ninja' 
size = (700, 500) 
rect_x = 50 
rect_y = 50 
rect_x1 = 345 
rect_y1 = 397 
rect_x_change = 10 
rect_y_change = 10 
rect_x_change1 = -10 
rect_y_change1 = -10 
vari = 0 
#Colours# 
WHITE = (255, 255, 255) 
BLUE = (0, 0, 255) 
RED = (255, 0, 0) 
GREEN = (18, 128, 13) 
YELLOW = (234, 255, 0) 
ORANGE = (255, 132, 0) 
LGREEN = (0,255,0) 
PURPLE = (204, 14, 166) 
BLACK = (0, 0, 0) 
#Starts Pygame# 
pygame.init() 
#Opens window# 
size = (700, 500) 
screen = pygame.display.set_mode(size) 
#Running Variables# 
done = False 
title = True 
about = False 
#Screens# 
def title(): 
    for event in pygame.event.get(): 
      if event.type == pygame.MOUSEBUTTONDOWN: 
       print('User pressed mouse.') 
      elif event.type == pygame.KEYDOWN: 
       print("User pressed a key") 
       pygame.draw.line(screen, BLUE, [0,0], [100,100], 5) 
      elif event.type == pygame.KEYUP: 
       print("User let go of a key.") 
      elif event.type == pygame.QUIT: 
       done = True 
    screen.fill(BLUE) 
    pygame.draw.rect(screen,BLACK,[200,20,350,100],0) 
    pygame.draw.rect(screen,GREEN,[280,180,200,50],0) 
    pygame.draw.rect(screen,GREEN,[280,240,200,50],0) 
    pygame.draw.rect(screen,GREEN,[280,300,200,50],0) 
    font = pygame.font.SysFont('Calibri', 45, True, False) 
    text = font.render("Squash Ninja", True, LGREEN) 
    screen.blit(text, [255, 75]) 
    font = pygame.font.SysFont('Calibri', 25, True, False)  
    text = font.render("Play", True, YELLOW) 
    screen.blit(text, [350, 200])  
    font = pygame.font.SysFont('Calibri', 25, True, False) 
    text = font.render("About", True, YELLOW) 
    screen.blit(text, [340, 260]) 
    font = pygame.font.SysFont('Calibri', 25, True, False) 
    text = font.render("Quit", True, YELLOW) 
    screen.blit(text, [355, 320]) 
    font = pygame.font.SysFont('Calibri', 10, True, False) 
    text = font.render("Version 1.2", True,WHITE) 
    screen.blit(text, [650, 470]) 
    font = pygame.font.SysFont('Calibri', 10, True, False) 
    text = font.render("Created by Adrian Ngai", True,WHITE) 
    screen.blit(text, [600, 480])  
    font = pygame.font.SysFont('Calibri', 10, True, False) 
    text = font.render("Copyright 2014, all rights reserved.", True,WHITE) 
    screen.blit(text, [555, 490])   
    mouse = pygame.mouse.get_pos() 
    if 280 + 200 > mouse [0] > 280 and 180+50 > mouse[1] > 180: 
     pygame.draw.rect(screen,LGREEN,[280,180,200,50],0) 
     font = pygame.font.SysFont('Calibri', 25, True, False) 
     text = font.render("Play", True, RED) 
     screen.blit(text, [350, 200])  
    if 280 + 200 > mouse [0] > 280 and 240+50 > mouse[1] > 240: 
     pygame.draw.rect(screen,LGREEN,[280,240,200,50],0) 
     font = pygame.font.SysFont('Calibri', 25, True, False) 
     text = font.render("About", True, RED) 
     screen.blit(text, [340, 260]) 
     if event.type == pygame.MOUSEBUTTONDOWN:   
      title = False 
      about = True 
    if 280 + 200 > mouse [0] > 280 and 300+50 > mouse[1] > 300: 
     pygame.draw.rect(screen,LGREEN,[280,300,200,50],0) 
     font = pygame.font.SysFont('Calibri', 25, True, False) 
     text = font.render("Quit", True, RED) 
     screen.blit(text, [355, 320])  
     if event.type == pygame.MOUSEBUTTONDOWN: 
      done = True 
    #bouncing rectangle# 
    pygame.draw.rect(screen, LGREEN, [rect_x, rect_y, 50, 50]) 
    rect_x += rect_x_change 
    rect_y += rect_y_change 
    if rect_y > 450 or rect_y < 0: 
     rect_y_change = rect_y_change * -1 
    if rect_x > 650 or rect_x < 0: 
     rect_x_change = rect_x_change * -1 
    pygame.draw.rect(screen, PURPLE, [rect_x1, rect_y1, 50, 50]) 
    rect_x1 += rect_x_change1 
    rect_y1 += rect_y_change1 
    if rect_y1 > 450 or rect_y1 < 0: 
     rect_y_change1 = rect_y_change1 * -1 
    if rect_x1 > 650 or rect_x1 < 0: 
     rect_x_change1 = rect_x_change1 * -1 
    for i in range(50): 
     x = random.randrange(0, 800) 
     y = random.randrange(0, 800) 
     pygame.draw.circle(screen,WHITE,[x,y],3) 
    pygame.display.flip() 
    clock.tick(20)  
def about() : 
    for event in pygame.event.get(): 
     if event.type == pygame.MOUSEBUTTONDOWN: 
      print('User pressed mouse.') 
     elif event.type == pygame.KEYDOWN: 
      print("User pressed a key") 
     pygame.draw.line(screen, BLUE, [0,0], [100,100], 5) 
     if event.type == pygame.QUIT: 
      done = True  
    screen.fill(BLUE) 
    pygame.draw.rect(screen,BLACK,[200,20,350,100],0) 
    font = pygame.font.SysFont('Calibri', 45, True, False) 
    text = font.render("About", True, LGREEN) 
    screen.blit(text, [255, 75])  
    pygame.draw.rect(screen,GREEN,[280,300,200,50],0) 
    font = pygame.font.SysFont('Calibri', 25, True, False)  
    text = font.render("Back", True, YELLOW) 
    screen.blit(text, [355, 320]) 
    mouse = pygame.mouse.get_pos()  
    if 280 + 200 > mouse [0] > 280 and 300+50 > mouse[1] > 300: 
     pygame.draw.rect(screen,LGREEN,[280,300,200,50],0) 
     font = pygame.font.SysFont('Calibri', 25, True, False) 
     text = font.render("Back", True, RED) 
     screen.blit(text, [355, 320])  
     if event.type == pygame.MOUSEBUTTONDOWN: 
      title = True 
      about = False 
    pygame.display.flip() 
    clock.tick(20) 
def done(): 
    while not done: 
     print() 
    while done: 
     pygame.quit() 
#Game Loop# 
while vari == 0: 
    done() 
while title: 
    title() 
while about: 
    about() 
#Closing Sequence# 
print('Test fail :(') 
pygame.quit() 

Answer 1

我認爲你的問題可能會在這裏

done = False 
... 
def done(): 
    while not done: 
     print() 
    while done: 
     pygame.quit() 

即使你有變量「完成」以前分配，你重新分配給一個函數。因爲done不再是false，所以函數執行第二個循環（「while done：」）並立即退出。

爲了獲得您期望的行爲，您應該將函數done（）重命名爲is_done（）。即

def is_done(): 
    while not done: 
     print() 
    while done: 
     pygame.quit()