不确定为什么 If 语句不起作用。 (Pygame)

Question

好的，现在当我在 "start.png" 处按 E 时，它会跳转到 "cele.png"，而我希望它跳转到 "new.png"。我希望它从 "start.png" 开始然后当您按 E 它应该更改为 "new.png" 如果您在背景为 "new.png" 时再次按 E 那么它应该更改为 "cele.png" 谢谢!

#import library
import pygame
from pygame.locals import *
 
#initialize the game
pygame.init()
width, height = 1000, 800
screen=pygame.display.set_mode((width, height))
pygame.display.set_caption("Pygame Window")
 
#load images
bg_filename = "start.png"
background = pygame.image.load(bg_filename)

#keep looping through
while 1:

    #clear the screen before drawing it again
    screen.fill(0)
    #draw the screen elements
    screen.blit(background, (0,0))
    #update the screen
    pygame.display.flip()
    #loop through the events
    for event in pygame.event.get():

        #start to new
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_e:
                if bg_filename == "start.png":
                    bg_filename = "new.png"
                    background = pygame.image.load(bg_filename)

        #new to cele 
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_e:
                if bg_filename == "new.png":
                    bg_filename = "cele.png"
                    background = pygame.image.load(bg_filename)

        #check if the event is the X button 
        if event.type==pygame.QUIT:
            #if it is quit the game
            pygame.quit() 
            exit(0)

Answer 1

Surfaces 没有用于检索文件名的对象，但也许您可以使用另一个变量来保存文件名？

#load images
bg_filename = "start.png"
background = pygame.image.load(bg_filename)

#keep looping through
while 1:
    #clear the screen before drawing it again
    screen.fill(0)
    #draw the screen elements
    screen.blit(background, (0,0))
    #update the screen
    pygame.display.flip()
    #loop through the events
    for event in pygame.event.get():
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_e:
                if bg_filename == "start.png":
                    bg_filename = "new.png"
                    background = pygame.image.load(bg_filename)

不确定为什么 If 语句不起作用。 (Pygame)

Not sure why If Statement is not working. (Pygame)

python

pygame

if-statement

python-2.7