尝试找到并单击按钮元素，但 Selenium Webdriver 引发 NoSuchElementException

Question

一直在尝试我能想到的所有选择器和属性，以便定位并单击网站主页上的注册按钮......但都无济于事。 请参阅网站：https://onepetro.org

一旦网络驱动程序启动，所有事件都会执行，直到到达单击按钮的位置，然后我得到一个

NoSuchElementException

。 任何建议或建议将不胜感激。谢谢

def user_auth(self, username:str, password:str):
        ''' Authenticate the user with the given username and password\n 
            Returns the captcha status, login status and username(if logged-in)'''
        if not self.at_homepage:
            self.go_to_homepage()
        self.find_element(By.CSS_SELECTOR, '.dropdown-toggle.signin').click()   # toggles the sign in dropdown

        WebDriverWait(self, 5).until(
            EC.presence_of_element_located((By.ID, "user_LoginFormPopup")),
            EC.presence_of_element_located((By.ID, "pass_LoginFormPopup"))
        )
        username_field = self.find_element(By.ID, "user_LoginFormPopup")
        username_field.clear()
        username_field.send_keys(username + Keys.TAB)

        password_field = self.find_element(By.ID, "pass_LoginFormPopup")
        password_field.clear()
        password_field.send_keys(password)

        WebDriverWait(self, 30).until(
            EC.presence_of_element_located((By.XPATH, '//iframe[@title="reCAPTCHA"]')),     # Wait for the reCAPTCHA to load
            EC.presence_of_all_elements_located((By.CSS_SELECTOR, '#sign-in-dropdown > div > div > div.login-form__section-wrap > div:nth-child(1) > div:nth-child(7) > button'))
        )
        self.solve_captcha()
        self.find_element(By.CSS_SELECTOR, '#sign-in-dropdown > div > div > div.login-form__section-wrap > div:nth-child(1) > div:nth-child(7) > button').click()    # Click the sign in button
        # self.execute_script("document.querySelector('.signin-button').click();")    # Click the sign in button

        try:
            # user_menu = self.find_element(By.XPATH, '//*[@id="sign-in-dropdown"]/div')
            _ = self.find_element(By.XPATH, '//*[@id="sign-in-dropdown"]/div/div/div[2]/div[1]/div[2]')     # Check for presence of error message
        except NoSuchElementException as e:
            self.logged_in = True; self.username = username
        else:
            self.logged_in = False
        return self.captcha_status, self.logged_in, self.username

尝试使用几个选择器，包括 XPATH、NAME、CLASS、ID 和 CSS 选择器本身，但都产生相同的

NoSuchElementException

。我仍然很困惑为什么没有一个起作用。

Answer 1

我相信问题可能与切换到

iframe

来解决验证码有关，但发布时不切换到默认内容， 因为注册按钮位于 iframe 之外。

我运行了一个理智流程来检查它，它对我来说工作得很好。

iframe = d.find_element(By.XPATH,'//iframe[@title="reCAPTCHA"]')
d.switch_to.frame(iframe)
d.find_element(By.CSS_SELECTOR,'.recaptcha-checkbox-border').click()
d.switch_to.default_content()
time.sleep(50) #I am manually solving the captcha here. 
d.find_element(By.XPATH,'//button[text()="Sign In"]').click()
time.sleep(20) #To view the button click