我看到有个问题:Selenium-Webdriver Ruby --> How to wait for images to be fully loaded after click
但似乎没有人直接回答:我需要等待图像完全加载，而不仅仅是使用 selenium WebDriver 呈现在 DOM 中。我该怎么办？目前我正在使用
public static void waitUntilVisible(WebDriver webDriver, By locator) {
WebDriverWait driverWait = new WebDriverWait(webDriver, TIMEOUT);
driverWait.until(visibilityOfElementLocated(locator));
}
使用
/**
* An expectation for checking that an element is present on the DOM of a page and visible.
* Visibility means that the element is not only displayed but also has a height and width that is
* greater than 0.
*
* @param locator used to find the element
* @return the WebElement once it is located and visible
*/
public static ExpectedCondition<WebElement> visibilityOfElementLocated(
final By locator) {
return new ExpectedCondition<WebElement>() {
@Override
public WebElement apply(WebDriver driver) {
try {
return elementIfVisible(findElement(locator, driver));
} catch (StaleElementReferenceException e) {
return null;
}
}
@Override
public String toString() {
return "visibility of element located by " + locator;
}
};
}
但如果图像已经有高度和宽度，即使图像尚未加载，它也可能被视为可见
最佳答案
您可以执行一些 javascript 来查询 DOM。具体来说，HTMLImageElement 的 complete 属性.
public static void waitUntilVisible(WebDriver webDriver, By locator) {
WebDriverWait driverWait = new WebDriverWait(webDriver, TIMEOUT);
WebElement el = webDriver.findElement(locator);
driverWait.until(
new Predicate<WebDriver>() {
public boolean apply(WebDriver driver) {
return ((JavascriptExecutor)driver).executeScript("return arguments[0].complete", el);
}
}
);
}
但请注意 complete:
Returns a Boolean that is true if the browser has finished fetching the image, whether successful or not. It also shows true, if the image has no src value.
关于java - 等待图像完全加载 Selenium WebDriver，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42655802/