WebDriverWait未按预期工作

Question

我正在和selenium一起工作，刮一些数据。

有一个按钮在页面上，我正在点击说“Custom_Cols”。这个按钮为我打开了一个窗口，我可以在那里选择我的列。

WebDriverWait 

我的问题是为什么新窗口上的元素不可见，即使我正在等待元素的可见。补充一下，我已经尝试增加延迟时间，但我还是会偶尔出现这个错误。

我的密码在这里

def wait_for_elem_xpath(self, delay = None, xpath = ""):
    if delay is None:
        delay = self.delay

    try:
        myElem = WebDriverWait(self.browser, delay).until(EC.presence_of_element_located((By.XPATH , xpath)))
    except TimeoutException:
        print ("xpath: Loading took too much time!")
    return myElem
select_all_performance = '//*[@id="mks"]/body/div[7]/div[2]/div/div/div/div/div[2]/div/div[2]/div[2]/div/div[1]/div[1]/section/header/div'
self.wait_for_elem_xpath(xpath = select_all_performance).click()

Answer 1

等待元素并向前移动后，尝试调用click()方法而不是使用presence_of_element_located()方法，您需要使用element_to_be_clickable()，如下所示：

try:
    myElem = WebDriverWait(self.browser, delay).until(EC.element_to_be_clickable((By.XPATH , xpath)))

根据您在评论中提出的反问题，以下是三种方法的详细内容：

presence_of_element_locator(locator)定义如下：

class selenium.webdriver.support.expected_conditions.presence_of_element_located(locator)

Parameter : locator - used to find the element returns the WebElement once it is located

Description : An expectation for checking that an element is present on the DOM of a page. This does not necessarily mean that the element is visible or interactable (i.e. clickable). 

class selenium.webdriver.support.expected_conditions.visibility_of_element_located(locator)

Parameter : locator -  used to find the element returns the WebElement once it is located and visible

Description : An expectation for checking that an element is present on the DOM of a page and visible. Visibility means that the element is not only displayed but also has a height and width that is greater than 0.

element_to_be_clickable（定位器）定义如下：

class selenium.webdriver.support.expected_conditions.element_to_be_clickable(locator)

Parameter : locator - used to find the element returns the WebElement once it is visible, enabled and interactable (i.e. clickable).

Description : An Expectation for checking an element is visible, enabled and interactable such that you can click it.