Question

我在业余时间写了一个小游戏。这就是我到目前为止所做的：

from pygame import * #import relevant modules
from PIL import Image
import os, sys

init() #initialise

class sprite:

    def __init__(self, object, x = 0, y = 0, w = 0, h = 0):
        self.image = image.load(object).convert()
        self.posx = x
        self.posy = y
        self.position = ((x, y, w, h))

    def resize(self, sh, sw):
        self.image = transform.scale(self.image, (sh, sw))
        return self.image

    def move(self, window, background, right, down):
        self.posx = x + right
        self.posy = y + down
        window.blit(background, self.position, self.position)
        self.position.move(right, down)
        window.blit(self, self.position)
        window.update()




os.chdir('C:\\Users\\alesi\\Documents\\Pygame\\Project\\') #current folder change

win = display.set_mode((736, 552))#load window
Clock = time.Clock() #handy clock

background = image.load('background.jpg').convert()#load images
player = sprite('ball.png', 350, 275, 20, 20)
player = player.resize(20, 20)

win.blit(background, (0, 0))
win.blit(player, (350, 275))
display.update()

while True:
    event.pump()
    keys = key.get_pressed()
    if keys[K_ESCAPE]:
        sys.exit()
    elif keys[K_RIGHT]:
        player.move(win, background, 20, 0)
    elif keys[K_LEFT]:
        player.move(win, background, -20, 0)
    elif keys[K_DOWN]:
        player.move(win, background,0, 20)
    elif keys[K_UP]:
        player.move(win, background, 0, -20)

简而言之，它应该在背景上创建一个对象，并允许您使用箭头键移动对象。但是，我收到错误：

C:\Users\alesi\Documents\Pygame\Project>python2 game2.py
Traceback (most recent call last):
  File "game2.py", line 51, in <module>
    player.move(win, background, -20, 0)
AttributeError: 'pygame.Surface' object has no attribute 'move'

我很难理解为什么我的sprite类的播放器实例没有识别移动方法。另外，我很困惑为什么在win.blit（）函数中，我必须给出参数player而不是player.image，这是我存储图像的属性。

任何建议都将不胜感激。

Answer 1

代码

def resize(self, sh, sw):
    self.image = transform.scale(self.image, (sh, sw))
    return self.image

你返回Surface实例的图像 - 所以在行

player = player.resize(20, 20)

您将sprite实例替换为Surface实例

但您不必再将其分配给player。

执行：

def resize(self, sh, sw):
    self.image = transform.scale(self.image, (sh, sw))
    # without return

# without player = 
player.resize(20, 20)

之后player.move(...)将重新开始。
同样，您必须在player.image

中使用blit()

脚本使用Pygame

1 个答案: