Question

import pygame
import random

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

screen = pygame.display.set_mode((1200, 600))
title = pygame.display.set_caption("Speeding cars")
clock = pygame.time.Clock()
clock.tick(60)

class Car:
    def __init__(self, x, y, height, width):
        self.x = x
        self.y = y
        self.height = height
        self.width = width

    def drive(self, change):
        self.change = random.randint(1, 2)
        self.x += self.change
        pygame.draw.rect(screen, black, (self.x, self.y, self.height, self.width))

    def again(self):
        while True:
            if self.x + 50 > 1200:
                for car in cars:
                    car.drive(False)

cars = []

for i in range(1, 6):
    cars.append(Car(0, i*100, 50, 25))

driving = True

while driving:

    screen.fill(white)

    for car in cars:
        car.drive(False)
        car.again()


    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            quit()

    pygame.display.flip()

每当我尝试运行此代码时，我的pygame窗口就会停止响应。我注意到的事情是，每当我删除def again(self):代码块时，我的winodw都可以正常工作，但是我希望这些块在屏幕上消失后再次出现。谢谢。

Answer 1

您已经在again中实现了无限循环：

def again(self):
   while True:
       if self.x + 50 > 1200:
           for car in cars:
               car.drive(False)

注意，again在主应用程序循环中被调用，并且每辆车都被调用：

while driving:
   # [...]

   for car in cars:
       # [...]
       car.again()

如果要将所有赛车设置在其初始位置，则当1辆赛车到达赛道终点时，则必须验证是否有任何一辆赛车到达赛道终点，并估算{{1 }}所有汽车的坐标0：

.x

或更短

finished = [car for car in cars if car.x + 50 > 1200]
if len(finished) > 0:
    for car in cars:
        car.x = 0

在主应用程序循环中进行评估：

if any([car for car in cars if car.x + 50 > 1200]):
    for car in cars:
        car.x = 0

如果您想保持每辆车的位置，则只需在起点到达轨道终点（driving = True while driving: screen.fill(white) for car in cars: car.drive(False) if any([car for car in cars if car.x + 50 > 1200]): for car in cars: car.x = 0 for event in pygame.event.get(): if event.type == pygame.QUIT: pygame.quit() quit() pygame.display.flip()）时设置一辆车即可：

car.x -= 1200

class Car:
    # [...]

    def again(self):
        if self.x + 50 > 1200:
            self.x -= 1200

当我尝试运行代码时，Pygame窗口没有响应错误

1 个答案: