我目前使用硒webdriver解析通过facebook用户的朋友页面,并从AJAX脚本提取所有id。但我需要向下滚动来找到所有的朋友。如何向下滚动硒。我正在使用python。


当前回答

滚动加载页面。例如:medium, quora等

last_height = driver.execute_script("return document.body.scrollHeight")
    while True:
        driver.execute_script("window.scrollTo(0, document.body.scrollHeight-1000);")
        # Wait to load the page.
        driver.implicitly_wait(30) # seconds
        new_height = driver.execute_script("return document.body.scrollHeight")
    
        if new_height == last_height:
            break
        last_height = new_height
        # sleep for 30s
        driver.implicitly_wait(30) # seconds
    driver.quit()

其他回答

如果你想滚动到无限页面的底部(如linkedin.com),你可以使用下面的代码:

SCROLL_PAUSE_TIME = 0.5

# Get scroll height
last_height = driver.execute_script("return document.body.scrollHeight")

while True:
    # Scroll down to bottom
    driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")

    # Wait to load page
    time.sleep(SCROLL_PAUSE_TIME)

    # Calculate new scroll height and compare with last scroll height
    new_height = driver.execute_script("return document.body.scrollHeight")
    if new_height == last_height:
        break
    last_height = new_height

参考:https://stackoverflow.com/a/28928684/1316860

使用“send keys”方法滚动页面的循环:

pre_scroll_height = driver.execute_script('return document.body.scrollHeight;')
while True:
    driver.find_element_by_tag_name('body').send_keys(Keys.END)
    time.sleep(5)
    post_scroll_height = driver.execute_script('return document.body.scrollHeight;')

    print(pre_scroll_height, post_scroll_height)
    if pre_scroll_height == post_scroll_height:
        break
    pre_scroll_height=post_scroll_height

我发现解决这个问题的最简单的方法是选择一个标签,然后发送:

label.sendKeys(Keys.PAGE_DOWN);

希望它有用!

你可以使用send_keys来模拟一个END(或PAGE_DOWN)键按下(通常滚动页面):

from selenium.webdriver.common.keys import Keys
html = driver.find_element_by_tag_name('html')
html.send_keys(Keys.END)

这些答案都不适合我,至少不适合滚动facebook搜索结果页面,但经过大量测试后,我发现这个解决方案:

while driver.find_element_by_tag_name('div'):
    driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
    Divs=driver.find_element_by_tag_name('div').text
    if 'End of Results' in Divs:
        print 'end'
        break
    else:
        continue