使用带有 Java 的 Selenium Webdriver 滚动 Webelement

Question

请帮助我处理 StaleElementReferanceException。我正在尝试使用操作 class 滚动网络元素。下面是代码：

public void newsSearch() throws StaleElementReferenceException{

    driver.get("https://pi.persistent.co.in");
    driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
    driver.findElement(By.id("ui-accordion-1-header-2")).click();

    Actions act = new Actions(driver);
    int numOfPixels = 2;
    WebElement draggablePartOfScrollbar = driver.findElement(By.xpath("//*[@id='ui-accordion-1-panel-2']/div/div[2]/div[2]/div"));

    for (int i = 2; i < 50; i = i + numOfPixels) {

        act.moveToElement(draggablePartOfScrollbar).clickAndHold().moveByOffset(0, numOfPixels).release().perform();
        System.out.println("Inside for loop");

    }
    System.out.println("After for loop");
    driver.findElement(By.xpath("//*[@id='ulNotification']/li[5]/h3")).click();
    driver.close();
}

出现异常：

org.openqa.selenium.StaleElementReferenceException: Element not found in the cache - perhaps the page has changed since it was looked up
Command duration or timeout: 30.16 seconds
For documentation on this error, please visit: http://seleniumhq.org/exceptions/stale_element_reference.html
Build info: version: '2.45.0', revision: '5017cb8', time: '2015-02-26 23:59:50'
System info: host: 'BHD22524', ip: '10.11.66.6', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.7.0_55'
Session ID: 03f8c7ca-a582-41b5-80d3-2ec53de719f5
Driver info: org.openqa.selenium.firefox.FirefoxDriver
Capabilities [{platform=WINDOWS, acceptSslCerts=true, javascriptEnabled=true, cssSelectorsEnabled=true, databaseEnabled=true, browserName=firefox, handlesAlerts=true, nativeEvents=false, webStorageEnabled=true, rotatable=false, locationContextEnabled=true, applicationCacheEnabled=true, takesScreenshot=true, version=37.0.1}]

第 50 行即

act.moveToElement(draggablePartOfScrollbar).clickAndHold().moveByOffset(0, numOfPixels).release().perform();

我试过用try catch，还是不行。提前谢谢你。

Answer 1

在迭代次数的 for 循环条件中出现异常？

因为一旦元素被移动或拖动，页面 DOM 将更新并且该元素将无法再移动。这就是您获得 StaleElementReferenceException 的原因。请参阅有关 StaleElementReferenceException

的解释

您移动元素的代码应如下所示：

act.moveToElement(draggablePartOfScrollbar).clickAndHold().moveByOffset(0, numOfPixels).release().build().perform();

使用带有 Java 的 Selenium Webdriver 滚动 Webelement

Scrolling Webelement using Selenium Webdriver with Java

java

selenium-webdriver

testng