java - 在网页上搜索 iframe

Question

如何判断网页上是否存在 iframe？

Html 标签如下所示

<div class="bluebox">
   <div class="title"><span>Preview</span></div>
   <div class="content">
      <iframe frameborder="0" src="about:blank" style="width:100%;height:488px;border:0 none;" id="previewFrame"></iframe>
   </div>
   <div class="box_shadow">
      <div class="left"></div>
      <div class="right"></div>
   </div>
</div>

在我的代码中我写的是:

driver.switchTo().frame(driver.findElement(By.id("previewFrame")));
System.out.println("Successfully switched to frame.");

boolean checkStatus = driver.findElement(By.id("previewFrame")).isDisplayed();

错误:找不到 iframe

Answer 1

你可以做类似的事情

boolean isExists = true;
try {
       driver.findElement(By.id("previewFrame");
       // No exception means frame is present
    } catch (NoSuchElementException e) {
       // Exception, no such frame is present
       isExists = false;
    }