javascript - 如何在selenium中控制滚动到底部的速度

Question

我正在学习selenium，我想获取示例网站的所有图片，图片使用了lazyload，并且只有当图片的父元素出现在屏幕可见范围内时才会显示图片。

如果图像的父元素没有出现在屏幕可见范围内，则显示以下代码:

<a class="picture" href="http://new.qq.com/omn/20190405/20190405A0CB58.html" target="_blank"><div class="lazyload-placeholder">终于出手规范融资业务！港证监会规定最高不得超过5倍融资</div></a>

如果图像的父元素出现在屏幕可见范围内，则显示以下代码:

<a class="picture" href="http://new.qq.com/omn/20190405/20190405A0CB58.html" target="_blank"><img alt="终于出手规范融资业务！港证监会规定最高不得超过5倍融资" src="//inews.gtimg.com/newsapp_ls/0/8439863897_294195/0"></a>

我想控制滚动到底部的速度，使图像全部显示出来。

如何在selenium中控制滚动到底部的速度？

我正在尝试修改window.scrollTo(0, document.body.scrollHeight);,

但没有成功。

#coding:utf-8
import time
from selenium import webdriver
from selenium.webdriver.common.by import By


driver = webdriver.Chrome()

driver.get("https://new.qq.com/rolls/?ext=news")

i = 0
while (i < 10):
    driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
    time.sleep(1)
    i += 1

Answer 1

已更新。添加了一些代码。谢谢@Sers。

以下是如何获取标题和图片链接等新闻详细信息的示例，请检查代码内的注释:

#coding:utf-8
import time
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as ec
from selenium.webdriver.common.action_chains import ActionChains


driver = webdriver.Chrome()

driver.get("https://new.qq.com/rolls/?ext=news")

wait = WebDriverWait(driver, 10)


# Scroll until load more button will have "没有更多了" text
while True:
    driver.execute_script("arguments[0].scrollIntoView();",  driver.find_element_by_id("load-more"))
    if driver.find_element_by_id("load-more").text == "没有更多了":
        break

# list of maps
results = []



# Gel all news and iterate
news = wait.until(ec.presence_of_all_elements_located((By.CSS_SELECTOR, "ul.list li")))
for item in news:
    # scroll to each news
    driver.execute_script("arguments[0].scrollIntoView();", item)
    # get title
    title = item.find_element_by_css_selector("h3 a").text.strip()
    # wait until a.picture element will have visible img
    img = wait.until(ec.visibility_of(item.find_element_by_css_selector("a.picture img")))

    # add news details to the result
    results.append({"title": title, "href": item.get_attribute("href"), "img": img.get_attribute("src")})

for result in results:
    print(f"title: {result['title']}, img: {result['img']}")

driver.quit()