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python - Pygame我的敌人类在移动后消失了

问题描述

当您第一次加载游戏时，代码工作正常，两个矩形在那里，但是当玩家移动时，敌人的矩形消失了。

扩展我试图让敌人类不断上下移动，而无需按下任何键。

import pygame
import os 
import random 
from pygame.locals import * # Constants
import math
import sys
import random

pygame.init()  

screen=pygame.display.set_mode((1280,720)) #(length,height)
screen_rect=screen.get_rect()
background = pygame.Surface(screen.get_size())
background = pygame.image.load('stage.png').convert()
screen.blit(background, (0, 0))

class Player(pygame.sprite.Sprite):
    def __init__(self):
        self.rect = pygame.draw.rect(screen, (0,0,128), (50,560,50,25)) #(colour)(x-position,y-position,width,height)
        self.dist = 100

    def draw_rect(self,x,y):    # This is my code which should make the player move
        screen.blit(background, (0, 0)) #If this isn't included then when the rectangle moves it's old positon will still be on the screen
        self.rect = self.rect.move(x*self.dist, y*self.dist); pygame.draw.rect(screen, (0, 0, 128), self.rect)
        pygame.display.update()

    def handle_keys(self): # code to make the character move when the arrow keys are pressed
        keys = pygame.key.get_pressed()
        if keys[K_LEFT]:
            self.draw_rect(-0.05,0)
        elif keys[K_RIGHT]:
            self.draw_rect(0.05,0)
        elif keys[K_UP]:
            self.draw_rect(0,-0.05)
        elif keys[K_DOWN]:
            self.draw_rect(0,0.05)
        elif keys[K_SPACE]:
            self.draw_rect(0.05,-0.05)
        if self.rect.right > 1280:
            self.rect.right = 1280
        if self.rect.left < 0:
            self.rect.left = 0
        if self.rect.bottom > 720:
            self.rect.bottom = 720
        if self.rect.top < 0:
            self.rect.top = 0

class Enemy(pygame.sprite.Sprite): # the enemy class which works fine
    def __init__(self):
        x = random.randint(50,450)
        self.rect = pygame.draw.rect(screen, (128,0,0), (300,x,50,25))


player = Player()
enemy = Enemy()

def main():  #my main loop 
    running = True
    while running:
        player.handle_keys()
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                running = False
        pygame.display.flip()   #updates the whole screen

if __name__ == '__main__': main()

标签： pythonclasspygame

解决方案

只有当类在__init__()

你需要在main()函数中的每个循环之前绘制它们pygame.display.flip()

按照现在的情况，玩家和敌人都不应该显示超过第一帧

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