如何在 PyGame 中拖动超过 2 个图像？答案

【问题标题】：How can I drag more than 2 images in PyGame?如何在 PyGame 中拖动超过 2 个图像？
【发布时间】：2020-10-29 13:48:45
【问题描述】：

我有这个代码，但我想用其他 4 张图片来做这个？

 import pygame
 from pygame.locals import *

 pygame.display.init()
 screen = pygame.display.set_mode((1143,677 ))

img = pygame.image.load(r"C:\Users\ga-sa\Downloads\As.png")
img1 = pygame.image.load(r"C:\Users\ga-sa\Downloads\03.png")
imgPos = img.get_rect(topleft = (20, 20))
imgPos1 = img1.get_rect(topleft = (60, 20))
current_image = None

 LeftButton = 0
while 1:
for e in pygame.event.get():
    if e.type == QUIT:
        pygame.quit()
        exit(0)

    if e.type == pygame.MOUSEBUTTONDOWN:
        if imgPos.collidepoint(e.pos):
            current_image = 0
        elif imgPos1.collidepoint(e.pos):
            current_image = 1
        else: 
            current_image = None

    if e.type == MOUSEMOTION:
        if e.buttons[LeftButton]:
            rel = e.rel
            if current_image == 0:
                imgPos.x += rel[0]
                imgPos.y += rel[1]
            elif current_image == 1:
                imgPos1.x += rel[0]
                imgPos1.y += rel[1]

screen.fill(0)
screen.blit(img, imgPos)
screen.blit (img1, imgPos1)
pygame.display.flip()
pygame.time.delay(30)

所以这是我的代码，我想放 4 张图片，而不是只放两张图片，我想放更多图片，但它是布尔值，所以是 0 或 1

【问题讨论】：

标签： python pygame pygame-surface

【解决方案1】：

创建一个包含 4 个图像的列表：

images = [img1, img2, img3, img4]

创建图像矩形列表：

img_rects = [images[i].get_rect(topleft = (20+40*i, 20)) for i in range(len(images))]

使用pygame.Rect.collidelist查找被点击的图片：

if e.type == pygame.MOUSEBUTTONDOWN:
    mouse_rect = pygame.Rect(e.pos, (1, 1))
    current_image = mouse_rect.collidelist(img_rects)

画current_image：

if e.type == MOUSEMOTION:
    if e.buttons[LeftButton]:
        rel = e.rel
        if 0 <= current_image < len(images):
            img_rects[current_image].x += rel[0]
            img_rects[current_image].y += rel[1]

循环绘制图像：

for i in range(len(images)):
    screen.blit(imgages[i], img_rects[i])

小例子：

import pygame
from pygame.locals import *

pygame.display.init()
screen = pygame.display.set_mode((1143, 677))

img1 = pygame.image.load(r"C:\Users\ga-sa\Downloads\As.png")
img2 = pygame.image.load(r"C:\Users\ga-sa\Downloads\03.png")
img3 = pygame.image.load(r"C:\Users\ga-sa\Downloads\As.png")
img4 = pygame.image.load(r"C:\Users\ga-sa\Downloads\03.png")

images = [img1, img2, img3, img4]

current_image = -1
img_rects = [images[i].get_rect(topleft = (20+40*i, 20)) for i in range(len(images))]

LeftButton = 0
while 1:
    for e in pygame.event.get():
        if e.type == QUIT:
            pygame.quit()
            exit(0)

        if e.type == pygame.MOUSEBUTTONDOWN:
            mouse_rect = pygame.Rect(e.pos, (1, 1))
            current_image = mouse_rect.collidelist(img_rects)

        if e.type == MOUSEMOTION:
            if e.buttons[LeftButton]:
                rel = e.rel
                if 0 <= current_image < len(images):
                    img_rects[current_image].x += rel[0]
                    img_rects[current_image].y += rel[1]

    screen.fill(0)
    for i in range(len(images)):
        screen.blit(images[i], img_rects[i])
    pygame.display.flip()
    pygame.time.delay(30)

【讨论】：

不加载任何图片，只是黑屏
@Gabrielbueno 代码现在可以工作了。有一些错别字，因为我是在智能手机上写的。