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我正在使用一個類來產生一個飛行在屏幕上的刀，但是我想在它離開屏幕後將其刪除。我曾嘗試使用pygame.time.delay()，但導致程序崩潰，我嘗試使用list.remove()，但我無法做到這一點。在一段時間後刪除使用類創建的項目
import pygame
import sys
from pygame.locals import *
import time
from anim import Anim
LEFT, RIGHT = 0, 1
def resetanim():
global ninja_anim
if x_change !=0:
ninja_anim=ninja_run
elif x_change==0:
ninja_anim = ninja_stand
old_dir = ninja_anim.dir
ninja_anim.face(old_dir)
ninja_anim.reset()
pygame.init()
display_width=1000
display_height=800
game_display=pygame.display.set_mode((display_width,display_height))
pygame.display.set_caption("EPQ Game")
forest_img=pygame.image.load("forest.jpg")
game_display.blit(forest_img,(0,0))
clock=pygame.time.Clock()
ninja_stand=Anim(lambda _: "Idle__000.png",1, 10, (95, 180), True, 1)
ninja_stand.load()
kunai=pygame.image.load("Kunai.png")
kunai=pygame.transform.scale(kunai, (13,55))
ninja_run=Anim("Run__00%s.png".__mod__, 0, 9, (150, 180), True, 10)
ninja_run.load()
ninja_slide=Anim("Slide__00%s.png".__mod__, 0, 9, (150, 145), True, 10)
ninja_slide.load()
ninja_jump=Anim("Jump__00%s.png".__mod__, 0, 9, (150, 180), True, 15)
ninja_jump.load()
ninja_throw = Anim("Throw__00%s.png".__mod__, 0, 9, (150, 180), False, 10, oncomplete=resetanim)
ninja_throw.load()
ninja_anim = ninja_stand
def ninja(x,y):
game_display.blit(ninja_anim.next(),(x,y))
class Knife():
def __init__(self, vx):
self.x=display_width//2+30
self.y=int(ground+65)
self.vx=vx
self.angle = 0
self.vangle = 30
def update(self):
self.x+=self.vx
self.angle += self.vangle
def draw(self):
game_display.blit(pygame.transform.rotate(kunai, self.angle), (self.x, self.y))
x= 0
ground = (display_height * 0.6)
y = ground - 10
x_change = 0
y_change = 0
gravity = 1
jump_speed = 15
img_width = 1600
img_facing_right = True
bx=0
ix=0
knifes=[]
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
if event.type==pygame.KEYDOWN:
if event.key==pygame.K_LEFT:
ninja_anim=ninja_run
ninja_anim.face(LEFT)
img_facing_right=False
x_change = 5
elif event.key==pygame.K_RIGHT:
ninja_anim=ninja_run
ninja_anim.face(RIGHT)
img_facing_right=True
x_change = -5
elif event.key == pygame.K_UP and y >= ground:
y_change -= jump_speed
old_dir = ninja_anim.dir
ninja_anim=ninja_jump
ninja_anim.face(old_dir)
ninja_anim.reset()
elif event.key == pygame.K_DOWN and y >=ground:
ninja_anim=ninja_slide
if img_facing_right==True:
ninja_anim.face(RIGHT)
elif img_facing_right==False:
ninja_anim.face(LEFT)
elif event.key == pygame.K_SPACE and y >= ground:
knifes.append(Knife(20 if img_facing_right else -20))
old_dir = ninja_anim.dir
ninja_anim = ninja_throw
ninja_anim.face(old_dir)
ninja_anim.reset()
if event.type==pygame.KEYUP:
if event.key==pygame.K_LEFT or event.key==pygame.K_RIGHT:
x_change = 0
ninja_anim=ninja_stand
if img_facing_right==True:
ninja_anim.face(RIGHT)
elif img_facing_right==False:
ninja_anim.face(LEFT)
ninja_anim.reset()
elif event.key==pygame.K_DOWN:
if x_change !=0:
ninja_anim=ninja_run
elif x_change == 0:
ninja_anim=ninja_stand
ninja_anim.reset()
x -= x_change
bx+=x_change
ix+=x_change
if y < ground:
y_change += gravity
y += y_change
if y > ground:
y = ground
y_change = 0
if x_change !=0:
ninja_anim=ninja_run
elif x_change==0:
ninja_anim=ninja_stand
ninja_anim.reset()
game_display.fill([255,255,255])
if ix < -1600 or ix > 1600:
ix = 0
game_display.blit(forest_img, (ix,0))
game_display.blit(forest_img, (ix+1600,0))
game_display.blit(forest_img, (ix-1600,0))
for knife in knifes:
knife.draw()
knife.update()
ninja(500, y)
pygame.display.update()
clock.tick(60)
有人可以幫我嗎？謝謝。
使用pygame時鐘模塊並使用clock.tick（）來跟蹤時間。 Clock.tick（）返回自上次調用以來的時間。 – Fredrik
使用[pygame.time.get_ticks]（http://pygame.org/docs/ref/time.html#pygame.time.get_ticks）來控制對象 - 'destroy_time = current_time + delay'，稍後'if current_time> = destroy_time：destroy_object' – furas
如果在for循環中使用'list.remove（）'，那麼你可能會遇到一些問題 - 最好用你想保留的元素創建新列表。在循環之後用新列表替換舊列表。 – furas