Selenium webdriver定位iframe裏面元素兩種方法

以東方財富網登陸頁面爲例：

 

在查找元素過程當中，直接經過id或者xpath等找不到元素，查看頁面源代碼發現元素是屬於iframe裏，例如：

<div class="wrap_login">
        <iframe class="frame_login" src="https://exaccount.eastmoney.com/home/login?request=%7b%22agentPageUrl%22%3a%22https%3a%2f%2fpassport.eastmoney.com%2fpub%2fLoginAgent%22%2c%22redirectUrl%22%3a%22http%3a%2f%2fwww.eastmoney.com%2f%22%2c%22callBack%22%3a%22LoginCallBack%22%2c%22redirectFunc%22%3a%22PageRedirect%22%2c%22data%22%3a%7b%22domainName%22%3a%22passport.eastmoney.com%22%2c%22deviceType%22%3a%22Web%22%2c%22productType%22%3a%22UserPassport%22%2c%22versionId%22%3a%220.0.1%22%7d%7d"></iframe>
    </div>

如下爲了定位到iframe裏面元素，有2種方法：

方法一：單獨打開iframe網址，直接定位。

    @Test
    public void loginTest() throws InterruptedException {

        System.setProperty("webdriver.firefox.bin", "D:\\Program Files\\Mozilla Firefox\\firefox.exe");
        WebDriver driver = new FirefoxDriver();
        driver.get("https://exaccount.eastmoney.com/home/login?request=%7b%22agentPageUrl%22%3a%22https%3a%2f%2fpassport.eastmoney.com%2fpub%2fLoginAgent%22%2c%22redirectUrl%22%3a%22http%3a%2f%2fwww.eastmoney.com%2f%22%2c%22callBack%22%3a%22LoginCallBack%22%2c%22redirectFunc%22%3a%22PageRedirect%22%2c%22data%22%3a%7b%22domainName%22%3a%22passport.eastmoney.com%22%2c%22deviceType%22%3a%22Web%22%2c%22productType%22%3a%22UserPassport%22%2c%22versionId%22%3a%220.0.1%22%7d%7d");  
        driver.manage().window().maximize();
        Thread.sleep(3000);   
        driver.findElement(By.id("txt_account")).sendKeys("ycyzharry");
        driver.findElement(By.id("txt_pwd")).sendKeys("password");
        driver.findElement(By.id("btn_login")).click();
    }

}

方法二：先切換到iframe，再進行定位。

    @Test
    public void clickButtonTest() throws InterruptedException {

        System.setProperty("webdriver.firefox.bin", "D:\\Program Files\\Mozilla Firefox\\firefox.exe");
        WebDriver driver = new FirefoxDriver();
        driver.get("https://passport.eastmoney.com/pub/login?backurl=http%3A//www.eastmoney.com/");
        driver.manage().window().maximize();
        Thread.sleep(3000);

        WebElement iframe = driver.findElement(By.className("frame_login")); driver.switchTo().frame(iframe);
        driver.findElement(By.id("txt_account")).sendKeys("ycyzharry");
        driver.findElement(By.id("txt_pwd")).sendKeys("password");
        driver.findElement(By.id("btn_login")).click();

   }

}

值得注意的是，若是iframe有id時，切換iframe時把id做爲參數直接傳入

driver.switchTo().frame("id");

以上示例中，iframe沒有id，只有class="frame_login"，因此咱們須要先經過classname定位到iframe元素，再把該元素做爲參數傳入。

例如，若是要跳出iframe，能夠使用如下方法：

driver.switchTo().defaultContent();