Python 在Pygame中单击堆叠图像时出错

我做了一些代码，点击并拖动图像到堆栈的某个点。它在最初的几次点击中工作得很好，但当我把它放在同一个地方好几次时，它突然变得不可接近。我如何修复它，如果你还好，你能让它更紧凑吗

import pygame
from pygame import *
import sys
import os

pygame.init()
s_width = 640
s_height = 480

screen = pygame.display.set_mode((s_width, s_height))
pygame.display.set_caption("TITLE")
bigfont = pygame.font.SysFont(None, 50)
smallfont = pygame.font.SysFont(None, 25)
title = bigfont.render("TITLE", True, (0,0,0))

current_path = os.path.dirname(__file__)
img_path = os.path.join(current_path, "images")

img_list = [] 
place_list = []
temp = []

class Img_Set:
    def __init__(self, path, x_pos, y_pos):
        self.image = pygame.image.load(path)
        self.x_pos = x_pos
        self.y_pos = y_pos
        self.rect = self.image.get_rect()
        self.rect.left = self.x_pos
        self.rect.top = self.y_pos
        img_list.append(self)
        self.click = False
    def offset(self):
        self.offset_len_x = event.pos[0] - self.x_pos
        self.offset_len_y = event.pos[1] - self.y_pos
    def drag(self):
        self.x_pos = event.pos[0] - self.offset_len_x
        self.y_pos = event.pos[1] - self.offset_len_y
        self.rect.left = self.x_pos
        self.rect.top = self.y_pos

class Place_Set:
    def __init__(self, path, x_pos, y_pos):
        self.image = pygame.image.load(path)
        self.x_pos = x_pos
        self.y_pos = y_pos
        self.rect = self.image.get_rect()
        self.rect.left = self.x_pos
        self.rect.top = self.y_pos
        place_list.append(self)
        self.click = False

img1 = Img_Set("images/80x80_blueball.png", s_width/3, s_height/3)
img2 = Place_Set("images/80x80_ball.png", s_width/2, s_height/3)
img3 = Place_Set("images/80x80_greenball.png", s_width/3*2, s_height/3)

while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
        elif event.type == MOUSEBUTTONDOWN:
            if event.button == 1:
                for x in img_list:
                    if x.rect.collidepoint(event.pos):
                        temp.append(x)
                if len(temp) > 0:
                    temp[-1].offset()
                    temp[-1].click = True
                    img_list.remove(temp[-1])
                    img_list.append(temp[-1])
                    temp = []
        elif event.type == MOUSEMOTION:
            for x in img_list:
                    if x.click:
                        x.drag()
        elif event.type == MOUSEBUTTONUP:
            for x in img_list:
                for y in place_list:
                    if x.rect.colliderect(y.rect):
                        x.x_pos = y.x_pos
                        x.y_pos = y.y_pos
            for x in img_list:
                x.click = False
        screen.fill((255, 255, 255))
        for x in place_list:
            screen.blit(x.image, (x.x_pos, x.y_pos))
        for x in img_list:
            screen.blit(x.image, (x.x_pos, x.y_pos))


    pygame.display.update()

下面是运行gif的代码

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松开鼠标按钮时，您没有更新

rect

属性。拖动图像时，这会导致

x

、

y

和

rect

属性之间的错误偏移：

为True时：
对于pygame.event.get（）中的事件：
# [...]
elif event.type==MOUSEBUTTONUP:
对于img_列表中的x：
对于y就地_列表：
如果x.rect.collide rect（y.rect）：
x、 x_位置=y.x_位置
x、 y_pos=y.y_pos
x、 rect.left=y.x_pos#谢谢，所以忘记rect属性只是个错误+不知道rect.x，rect.y的用法。我会试着把它们放进去！