![](/img/trans.png)
[英]Why does my Tkinter Button disappear when i try to change the pady?
[英]Why does my image disappear when I'm not pressing a button?
代碼很好用,我的圖像按原樣翻轉,但是當我不按任何鍵時,我的圖像就會消失...我知道這與在屏幕中的每個“ if”語句中調用screen.blit方法有關。更新功能,但我不知道該如何解決...
import pygame, sys, glob
from pygame import *
h=400
w=800
screen = pygame.display.set_mode((w,h))
clock = pygame.time.Clock()
class player:
def __init__(self):
self.x = 200
self.y = 300
self.ani_speed_init = 8
self.ani_speed=self.ani_speed_init
self.Lani_speed_init = 8
self.Lani_speed=self.Lani_speed_init
self.ani = glob.glob("D:\Projects\pygame\TestGame\sprite*.png")
self.Lani = glob.glob("D:\Projects\pygame\TestGame\Lsprite*.png")
self.ani.sort()
self.ani_pos=0
self.Lani.sort()
self.Lani_pos=0
#takes length of the amount of images and subtracts 1 since count starts at 0
self.ani_max=len(self.ani) -1
self.Lani_max=len(self.Lani) -1
self.img = pygame.image.load(self.ani[0])
self.Limg = pygame.image.load(self.Lani[0])
self.update(0, 0)
def update(self, pos, posL):
if pos != 0:
#subtracts 1 from 10
self.ani_speed-=1
#adds self.x to itself
self.x+=pos
if self.ani_speed==0:
self.img = pygame.image.load(self.ani[self.ani_pos])
self.ani_speed = self.ani_speed_init
if self.ani_pos == self.ani_max:
self.ani_pos = 0
else:
self.ani_pos+=1
screen.blit(self.img,(self.x,self.y))
if posL != 0:
#subtracts 1 from 10
self.Lani_speed-=1
#adds self.x to itself
self.x+=posL
if self.Lani_speed==0:
self.Limg = pygame.image.load(self.Lani[self.Lani_pos])
self.Lani_speed = self.Lani_speed_init
if self.Lani_pos == self.Lani_max:
self.Lani_pos = 0
else:
self.Lani_pos+=1
screen.blit(self.Limg,(self.x,self.y))
player1 = player()
pos = 0
posL = 0
while 1:
screen.fill((255,255,255))
clock.tick(60)
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
pygame.quit()
elif event.type == KEYDOWN and event.key == K_RIGHT:
pos = 1
elif event.type == KEYUP and event.key == K_RIGHT:
pos = 0
elif event.type == KEYDOWN and event.key == K_LEFT:
posL = -1
elif event.type == KEYUP and event.key == K_LEFT:
posL = 0
player1.update(pos, posL)
pygame.display.update()
這是一個建議,而不是一個答案,因為很難告訴您要執行的操作,但是我需要格式化代碼,因此注釋並不是真正有用。 將擴展功能擴展為具有以下默認行為是否可行:
def update(self, pos, posL):
updated = False
if pos != 0:
(logic removed)
screen.blit(self.img,(self.x,self.y))
updated = True
if posL != 0:
(logic removed)
screen.blit(self.Limg,(self.x,self.y))
updated = True
if not updated:
screen.blit(something sensible for arguments of 0,0)
如果您只測試了pos == 0和posL == 0,則可以避免使用'updated'變量,但是更新后的測試允許上面的邏輯不做screen.blit,最終測試將確保始終將某些內容寫入屏幕。
與其允許更新功能將玩家帶到屏幕上,不如將玩家添加到默認的pygame sprite組中並通過while循環進行繪制! 我還避免每次更新都加載圖像(由於開銷),而是一次加載所有圖像,然后在需要時將其blit!
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