Pygame Pong球拍未出现

Question

我正在用Pygame做一个乒乓球游戏。在一个类的屏幕上显示时遇到了一些问题。我有一种感觉，要么是我的构造函数init方法不正确(尽管没有抛出任何错误)，要么是显示颜色覆盖了面板。

这是我的代码。

Program.py

import sys
import pygame

from settings import Settings
from paddles import Paddles
import game_functions as gf


def run_game():
    # Initialise pygame, settings and screen object.
    pygame.init()

    ai_settings = Settings()
    screen = pygame.display.set_mode((ai_settings.screen_width,ai_settings.screen_height))
    pygame.display.set_caption('Ping Pong')


    # Start the main loop for the game.
    while True:
        gf.check_events()
        gf.update_screen(ai_settings,screen)

    #Make paddles
    paddles = Paddles(screen)


run_game()

paddles.py

import pygame
import sys

class Paddles():

    def __init__(self, screen):
        self.screen = screen
        self.paddle_l = pygame.draw.rect(screen, (255, 255, 255), [15, 250, 10, 100])
        self.paddle_r = pygame.draw.rect(screen, (255, 255, 255), [780, 250, 10, 100])

    def paddles(self):
        pass

settings.py

class Settings():
    """A class to store all settings for Ping Pong"""

    def __init__(self):
        """Initialise the game's settings."""
        # Screen settings
        self.screen_width = 800
        self.screen_height = 600
        self.bg_colour = (0,0,0)

game_functions.py

import sys
import pygame

def check_events():
    """Respond to keypresses and mouse events."""
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()

def update_screen(ai_settings, screen):
    """Update images on the screen and flip to the new screen."""
    # Redraw the screen during each pass through the loop.
    screen.fill(ai_settings.bg_colour)


    pygame.display.flip()

就像我说的，我没有收到任何错误，游戏窗口只是打开了一个黑色的背景。当我把它放在一个普通函数中而不是一个类中时，代码就可以工作了。

我做错了什么？如何获得要显示的控制板？

Answer 1

将paddles设置在“主循环”之外有什么原因吗？

将paddles移动到您的update_screen方法中至少可以显示它们。但是，这是在每次调用update_screen时创建一个新的Paddles对象。

def update_screen(ai_settings, screen):
    """Update images on the screen and flip to the new screen."""
    # Redraw the screen during each pass through the loop.
    screen.fill(ai_settings.bg_colour)
    paddles = Paddles(screen)
    pygame.display.flip()