滾動到Selenium Webdriver（Python）

Question

先決條件。
您需要Instagram上的帳戶才能使用此腳本。
設置一個測試環境：

登錄，打開所需的列表（正常工作）：

from selenium import webdriver 
from selenium.webdriver.common.keys import Keys 
from time import sleep 

driver = webdriver.Chrome(
# driver = webdriver.Firefox( 
# driver = webdriver.PhantomJS(
    service_args=['--ignore-ssl-errors=true', '--ssl-protocol=any']) 

driver.get("https://instagram.com/accounts/login") 
username = driver.find_element_by_name("username") 
password = driver.find_element_by_name("password") 

username1 = 'instagram' # change it! 
password1 = 'instagrampassword1' # change it! 

username.send_keys(username1) 
password.send_keys(password1) 

submit_button = driver.find_element_by_css_selector(
    '#react-root > div > article > div > div:nth-child(1) > div > form > span > button') 
submit_button.click() 

sleep(2) 

link = 'https://www.instagram.com/youtube/' 
driver.get(link) 

driver.implicitly_wait(2) 
driver.find_elements_by_class_name("_218yx")[2].click() 

錯誤滾動。 如何解決此塊？

如何在此頁面上正確對焦和滾動？

我嘗試：

driver.find_element_by_class_name("_cx1ua").send_keys(Keys.NULL) # focus 
     #The element has been deleted entirely or 
     #The element is no longer attached to the DOM. 

driver.find_element_by_class_name("_q44m8").send_keys(Keys.NULL) 
# cannot focus element 

driver.find_element_by_class_name("_qjr85").send_keys(Keys.NULL) 
# cannot focus element 


for i in range(5): 
    driver.find_element_by_class_name("_cx1ua").send_keys(Keys.END) 

==================================== =========================
to @Moshisho：

我們需要關注一些元素來激活它。
問題是我們需要選擇關注的元素以及如何？
這不是一個「體」：
類似的東西，但不是這樣的：

background = driver.find_element_by_css_selector("body") 
# background = driver.find_element_by_css_selector("div._2uju6") 

for i in range(5): 
    background.send_keys(Keys.SPACE) 
    time.sleep(1) 

沒有它，這個命令不工作。

---

到@Naveen：

print(driver.find_element_by_css_selector("div._a1rcs").location_once_scrolled_into_view) # {'x': 0, 'y': 0} 
print(driver.find_element_by_class_name("_cx1ua").location_once_scrolled_into_view) # {'x': 376, 'y': 229} 
print(driver.find_element_by_class_name("_q44m8").location_once_scrolled_into_view) # {'x': 376, 'y': 180} 
print(driver.find_element_by_class_name("_qjr85").location_once_scrolled_into_view) # {'x': 376, 'y': 180} 

而且接下來會發生什麼？

driver.execute_script("window.scrollTo(0, 3000);") # do not working 

Answer 1

嘗試以下代碼：

from selenium import webdriver 
from selenium.webdriver.common.keys import Keys 
from time import sleep 
from selenium.webdriver.support.ui import Select 

driver = webdriver.Chrome(
# driver = webdriver.Firefox( 
# driver = webdriver.PhantomJS(
    service_args=['--ignore-ssl-errors=true', '--ssl-protocol=any']) 

driver.maximize_window() 

driver.get("https://instagram.com/accounts/login") 
username = driver.find_element_by_name("username") 
password = driver.find_element_by_name("password") 

username1 = 'instagramlogin1' # change it! 
password1 = 'instagrampassword1' # change it! 

username.send_keys(username1) 
password.send_keys(password1) 

submit_button = driver.find_element_by_css_selector(
    '#react-root > div > article > div > div:nth-child(1) > div > form > span > button') 
submit_button.click() 

sleep(2) 

link = 'https://www.instagram.com/youtube/' 
driver.get(link) 

driver.implicitly_wait(2) 
following = driver.find_element_by_xpath("//a[@href='/youtube/following/']/span") 
total_following = int(following.text) 
print "total no. of users following: ", total_following 
# click on 239 following, displays 10 users 
following.click() 

loaded_following = driver.find_elements_by_xpath("//ul[@class='_539vh _4j13h']/li") 
loaded_till_now = len(loaded_following) 

while(loaded_till_now<total_following): 
    print "following users loaded till now: ", loaded_till_now 
    print loaded_following[loaded_till_now-1] 
    loaded_following[loaded_till_now-1].location_once_scrolled_into_view 
    # driver.execute_script("arguments[0].focus();", loaded_following[loaded_till_now-1]) 
    driver.find_element_by_tag_name('body').send_keys(Keys.END) # triggers AJAX request to load more users. observed that loading 10 users at a time. 
    sleep(1) # tried wihtout sleep but throws StaleElementReferenceException. As it takes time to get the resposne and update the DOM 
    loaded_following = driver.find_elements_by_xpath("//ul[@class='_539vh _4j13h']/li") 
    loaded_till_now = len(loaded_following) 

# All 239 users are loaded. 
driver.quit() 

觀察發現瀏覽器發送AJAX請求加載更多的用戶。當您觸發此動作時scroll using mouse or enter Space or End keys

Answer 2

爲了在窗口中滾動，則需要執行JavaScript，試試這個：

driver.execute_script("window.scrollTo(0, document.body.scrollHeight);") 

編輯：爲了焦點的元素（它需要能夠獲得焦點，例如錨點，輸入，按鈕等......）您還需要使用JavaScript執行程序：

elementToFocus = driver.find_element_by_id("yourID") 
driver.execute_script("arguments[0].focus();", elementToFocus)