python - 为什么pygame blit不能在类里面工作

Question

我正在尝试使用带有类的 pygame 创建我自己的游戏，但我的问题是我无法理解为什么我的程序无法正常运行

import pygame
import time
import random
import sys

pygame.init()
screen = pygame.display.set_mode((1280, 720))
pygame.display.set_caption("this game")


class Background:

    def __init__(self, x, y):
        self.xpos = x
        self.ypos = y

    picture = pygame.image.load("C:/images/dunes.jpg")
    picture = pygame.transform.scale(picture, (1280, 720))

    def draw(self):
        pygame.surface.Surface.blit(picture, (self.xpos, self.ypos))



class Monster:
    def __init__(self, x, y):
        self.xpos = x
        self.ypos = y

    def move_left(self):
        self.xpos =- 5

    def move_right(self):
        self.xpos =+ 5

    def jump(self):
        for x in range(1, 10):
            self.ypos =-1
            pygame.display.show()

        for x in range(1, 10):
            self.ypos =+1
            pygame.display.show()

    picture = pygame.image.load("C:/pics/hammerhood.png")
    picture = pygame.transform.scale(picture, (200, 200))

    def draw(self):
        pygame.surface.Surface.blit(picture, (self.xpos, self.ypos))




class enemy:
    def __init__(self, x, y):
        self.xpos = x
        self.ypos = y

    picture = pygame.image.load("C:/pics/dangler_fish.png")
    picture = pygame.transform.scale(picture, (200, 200))


    def teleport(self):
        self.xpos = random.randint(1, 1280)
        self.pos= random.randint(1, 720)

    def draw(self):
        pygame.surface.Surface.blit(picture, (self.xpos, self.ypos))






while True:
    ice = Background(720, 360)
    hammerhood = Monster(200, 500)
    fish = enemy(0, 0)
    fish.teleport()


    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        if pygame.event == pygame.K_d:
            hammerhood.move_right()

        if pygame.event == pygame.K_a:
            hammerhood.move_left()

        if pygame.event == pygame.K_w:
            hammerhood.jump()

    hammerhood.draw()
    ice.draw()
    fish.draw()

它对我说的是，平局中的第 49 行

pygame.surface.Surface.blit(picture, (self.xpos, self.ypos))
NameError: name 'picture' is not defined

我已经尝试了所有方法，还有另一个项目是我从互联网上复制的，它与类里面的图片完全相同，但在这个项目中，它不起作用

Answer 1

您在类顶层定义图片，使其成为类属性。要从方法访问它，您必须使用 self。图片