pygame/python精灵不动？我做错了什么？（没有错误）

Question

好的，这是我的代码，我没有收到任何错误，但我的精灵（玩家）没有移动

import pygame,sys
import random
import time

#Colors
white = (255,255,255)
black = (0,0,0)
red = (255,0,0)
green = (0,255,0)
blue = (0,0,255)

class Block(pygame.sprite.Sprite):
    def __init__(self, color = blue, width = 50, height = 50):

    super(Block, self).__init__()

    self.image = pygame.Surface((width, height))

    self.image.fill(color)

    self.rect = self.image.get_rect()

def set_position(self, x , y):
    self.rect.x = x
    self.rect.y = y

def set_image(self, filename = None):
    if(filename != None):
        self.image = pygame.image.load(filename)

        self.rect = self.image.get_rect()

if (__name__ == "__main__"):
    pygame.init()

    window_size = window_width, window_height = 640,480
    window = pygame.display.set_mode(window_size)
    pygame.display.set_caption('Test')

    window.fill(white)
    clock = pygame.time.Clock()

    #important variables
    pos_x = 300
    pos_y = 200
    pos_x_change = 0
    pos_y_change = 0

    block_group = pygame.sprite.Group()
    player = Block()
    player.set_image('player.png')
    player.set_position(pos_x,pos_y)  #Player variable for pos

    another_block = Block(red)
    another_block.set_position(100,100)

    block_group.add(player, another_block)
    block_group.draw(window)

    pygame.display.update()



    running = True

    while(running):
        for event in pygame.event.get():
            if (event.type == pygame.QUIT):
                running = False

        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                pos_x_change = -10
            if event.key == pygame.K_RIGHT:
                pos_x_change = 10
            if event.key == pygame.K_UP:
                pos_y_change -10
            if event.key == pygame.K_DOWN:
                pos_y_change = 10
        if event.type == pygame.KEYUP:
            if event.key == pygame.K_LEFT:
                pos_x_change = 0
            if event.key == pygame.K_RIGHT:
                pos_x_change = 0
            if event.key == pygame.K_UP:
                pos_y_change == 0
            if event.key == pygame.K_DOWN:
                pos_y_change == 0


    pos_x += pos_x_change
    pos_y += pos_y_change
    clock.tick(60)

pygame.quit 
quit()

如您所见，我清楚地添加了 pos_x 和 pos_y 并将其设置为 pos_x += pos_x_change 和 pos_y += pos_y_change 但精灵仍然没有动。我猜这是代码错位，因为 python 严重依赖缩进？请向我解释我做错了什么，将不胜感激。

Answer 1

您似乎正在更新包含玩家 x 和 y 坐标的变量，但并未更新显示。这就是为什么看起来位置没有改变的原因。我相信在 clock.tick(60) 语句上方调用 player.set_position(pos_x,pos_y) 会解决问题。

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