無法使用Selenium webdriver切換到iframe

Question

我試圖點擊在類別屬性爲「modalIframe」的iframe中放置的SIGN IN鏈接。過去兩天我一直在努力尋找解決方案，但無法做到。任何幫助將非常感激。

代碼如下

public class Datereader 
{ 

    public static void main(String[] args) 
    { 
     System.setProperty("webdriver.gecko.driver","C:\\Users\\Madankumar\\Desktop\\Gecko Driver\\geckodriver.exe"); 
     WebDriver driver=new FirefoxDriver(); 
     driver.get("https://www.redbus.in/"); 
     driver.manage().window().maximize(); 
     driver.findElement(By.xpath(".//div[@class='icon-down icon ich dib']")).click(); 
     driver.findElement(By.id("signInLink")).click();  
     driver.manage().timeouts().implicitlyWait(3, TimeUnit.SECONDS); 
     WebElement iframeElement=driver.findElement(By.xpath("//*[@class='modalIframe']")); 
     driver.switchTo().frame(iframeElement); 
     driver.findElement(By.linkText("sign in")).click(); 


    } 
} 

在運行的代碼我得到以下錯誤：

JavaScript warning: https://cdn-jp.gsecondscreen.com/static/tac.min.js , line 3: unreachable code after return statement

Answer 1

在探索HTML和嘗試不同的XPath找到的元素，它被觀察到，是3 elements目前與相同的元素屬性。因此，爲了使其具有獨特性，請從GooglePlus Signup元素開始構建相對XPATH，然後找到相對於該元素的sign in鏈接。

試試下面的代碼：

WebDriver driver=new FirefoxDriver(); 
    driver.get("https://www.redbus.in/"); 
    driver.manage().window().maximize(); 
    driver.findElement(By.xpath(".//div[@class='icon-down icon ich dib']")).click(); 
    driver.findElement(By.id("signInLink")).click();  
    driver.manage().timeouts().implicitlyWait(3, TimeUnit.SECONDS); 
    WebElement iframeElement=driver.findElement(By.xpath("//*[@class='modalIframe']")); 
    driver.switchTo().frame(iframeElement); 
    WebElement elem = driver.findElement(By.xpath("//div[@id='googlePlusBtn1']/following-sibling::div/span/a")); 
    System.out.println("element " + elem); 
    Thread.sleep(1000); // without this line, observed that click is not resulting in displaying the Login form, though selenium did not throw any error (means, click did not result in Login form). you can alternatively try out with WebDriverWait. this is trial and error. if it is working for you without sleep, you can remove this line. 
    elem.click(); 
    Thread.sleep(5000); // can remove sleep. kept only for visual confirmaiton to check whether Login form is displayed, as there are no steps further after this in the code. 

Answer 2

使用下面的代碼來處理IFRAME。

WebElement iframe = driver.findElement(By.tagName("iframe")); 
driver.switchTo().frame(iframe);   //Move inside to the frame. 
WebElement body = driver.findElement(By.tagName("body")); 
body.click(); 
driver.findElement(By.linkText("sign in")).click(); 
driver.switchTo().defaultContent();  //Move outside to the frame.