isDisplayed方法遇到错误？

Question

如果（driver.findElement（By.id（id））。isDisplayed（））{

}

元素不可用时总是执行失败吗？

环境：

Appium 1.15.1

java客户端7.3.0

Selenium-java 3.141.59

错误日志：

Android Loding问题页面

org.openqa.selenium.NoSuchElementException：无法通过此策略定位元素：By.chained（{By.AccessibilityId：OK}）在io.appium.java_client.pagefactory.AppiumElementLocator.findElement（AppiumElementLocator.java:126）在io.appium.java_client.pagefactory.interceptors.InterceptorOfASingleElement.intercept（InterceptorOfASingleElement.java:59）在io.appium.java_client.ios.IOSElement $$ EnhancerByCGLIB $$ d311658.isDisplayed（）在并在And确认On On Menu列表正在导航到与OnBoared User对应的屏幕（：12）由以下原因引起：org.openqa.selenium.TimeoutException：预期的条件失败：等待io.appium.java_client.pagefactory.AppiumElementLocator$WaitingFunction@66ba7e45（以500毫秒为间隔尝试1秒）在org.openqa.selenium.support.ui.FluentWait.timeoutException（FluentWait.java:304）在org.openqa.selenium.support.ui.FluentWait.until（FluentWait.java:272）在io.appium.java_client.pagefactory.AppiumElementLocator.waitFor（AppiumElementLocator.java:99）在io.appium.java_client.pagefactory.AppiumElementLocator.findElement（AppiumElementLocator.java:119）在io.appium.java_client.pagefactory.interceptors.InterceptorOfASingleElement.intercept（InterceptorOfASingleElement.java:59）在io.appium.java_client.ios.IOSElement $$ EnhancerByCGLIB $$ d311658.isDisplayed（）在在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处在sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:498）在cumul.runtime.Utils $ 1.call（Utils.java:40）在cumul.runtime.Timeout.timeout（Timeout.java:16）在cumul.runtime.Utils.invoke（Utils.java:34）在黄瓜。运行时.java.JavaStepDefinition.execute（JavaStepDefinition.java:38）在黄瓜。运行时.StepDefinitionMatch.runStep（StepDefinitionMatch.java:37）在Cucumber.runtime.Runtime.runStep（Runtime.java:300）在cumul.runtime.model.StepContainer.runStep（StepContainer.java:44）在Cucumber.runtime.model.StepContainer.runSteps（StepContainer.java:39）在cumul.runtime.model.CucumberScenario.run（CucumberScenario.java:44）在cumul.runtime.junit.ExecutionUnitRunner.run（ExecutionUnitRunner.java:102）在Cucumber.runtime.junit.FeatureRunner.runChild（FeatureRunner.java:63）在Cucumber.runtime.junit.FeatureRunner.runChild（FeatureRunner.java:18）在org.junit.runners.ParentRunner $ 3.run（ParentRunner.java:290）在org.junit.runners.ParentRunner $ 1.schedule（ParentRunner.java:71）在org.junit.runners.ParentRunner.runChildren（ParentRunner.java:288）在org.junit.runners.ParentRunner.access处$ 000（ParentRunner.java:58）在org.junit.runners.ParentRunner上$ 2.evaluate（ParentRunner.java:268）在org.junit.runners.ParentRunner.run（ParentRunner.java:363）在Cucumber.runtime.junit.FeatureRunner.run（FeatureRunner.java:70）在Cucumber.api.junit.Cucumber.runChild（Cucumber.java:95）在Cucumber.api.junit.Cucumber.runChild（Cucumber.java:38）在org.junit.runners.ParentRunner $ 3.run（ParentRunner.java:290）在org.junit.runners.ParentRunner $ 1.schedule（ParentRunner.java:71）在org.junit.runners.ParentRunner.runChildren（ParentRunner.java:288）在org.junit.runners.ParentRunner.access处$ 000（ParentRunner.java:58）在org.junit.runners.ParentRunner上$ 2.evaluate（ParentRunner.java:268）在org.junit.internal.runners.statements.RunBefores.evaluate（RunBefores.java:26）在org.junit.internal.runners.statements.RunAfters.evaluate（RunAfters.java:27）在org.junit.runners.ParentRunner.run（ParentRunner.java:363）在Cucumber.api.junit.Cucumber.run（Cucumber.java:100）在org.junit.runner.JUnitCore.run（JUnitCore.java:137）在org.junit.runner.JUnitCore.run（JUnitCore.java:115）在org.junit.vintage.engine.execution.RunnerExecutor.execute（RunnerExecutor.java:39）在java.util.stream.ForEachOps $ ForEachOp $ OfRef.accept（ForEachOps.java:184）在java.util.stream.ReferencePipeline $ 3 $ 1.accept（ReferencePipeline.java:193）在java.util.Iterator.forEachRemaining（Iterator.java:116）在java.util.Spliterators $ IteratorSpliterator.forEachRemaining（Spliterators.java:1801）在java.util.stream.AbstractPipeline.copyInto（AbstractPipeline.java:481）在java.util.stream.AbstractPipeline.wrapAndCopyInto（AbstractPipeline.java:471）在java.util.stream.ForEachOps $ ForEachOp.evaluateSequential（ForEachOps.java:151）在java.util.stream.ForEachOps $ ForEachOp $ OfRef.evaluateSequential（ForEachOps.java:174）在java.util.stream.AbstractPipeline.evaluate（AbstractPipeline.java:234）在java.util.stream.ReferencePipeline.forEach（ReferencePipeline.java:418）在org.junit.vintage.engine.VintageTestEngine.executeAllChildren（VintageTestEngine.java:79）在org.junit.vintage.engine.VintageTestEngine.execute（VintageTestEngine.java:70）在org.junit.platform.launcher.core.DefaultLauncher.execute（DefaultLauncher.java:220）在org.junit.platform.launcher.core.DefaultLauncher.lambda $ execute $ 6（DefaultLauncher.java:188）在org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams（DefaultLauncher.java:202）在org.junit.platform.launcher.core.DefaultLauncher.execute（DefaultLauncher.java:181）在org.junit.platform.launcher.core.DefaultLauncher.execute（DefaultLauncher.java:128）在org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.run（JUnit5TestReference.java:89）在org.eclipse.jdt.internal.junit.runner.TestExecution.run（TestExecution.java:41）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:541）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:763）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run（RemoteTestRunner.java:463）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main（RemoteTestRunner.java:209）原因：org.openqa.selenium.NoSuchElementException：无法使用By.chained（{By.AccessibilityId：OK}）来定位元素。有关此错误的文档，请访问：https://www.seleniumhq.org/exceptions/no_such_element.html构建信息：版本：'3.141.59'，修订版本：'e82be7d358'，时间：'2018-11-14T08：17：03'系统信息：主机：'Elites-MacBook-Pro-4.local'，ip：'fe80：0：0：0：1c56：6e8a：fceb：a653％en0'，操作系统名称：'Mac OS X'，os .arch：'x86_64'，os.version：'10 .15.3'，java.version：'1.8.0_201'驱动程序信息：driver.version：IOSDriver在io.appium.java_client.pagefactory.bys.builder.ByChained.findElement（ByChained.java:74）在org.openqa.selenium.remote.RemoteWebDriver.findElement（RemoteWebDriver.java:315）在io.appium.java_client.DefaultGenericMobileDriver.findElement（DefaultGenericMobileDriver.java:57）在io.appium.java_client.AppiumDriver.findElement（AppiumDriver.java:1）在io.appium.java_client.ios.IOSDriver.findElement（IOSDriver.java:1）在io.appium.java_client.pagefactory.bys.ContentMappedBy.findElement（ContentMappedBy.java:50）在org.openqa.selenium.remote.RemoteWebDriver.findElement（RemoteWebDriver.java:315）在io.appium.java_client.DefaultGenericMobileDriver.findElement（DefaultGenericMobileDriver.java:57）在io.appium.java_client.AppiumDriver.findElement（AppiumDriver.java:1）在io.appium.java_client.ios.IOSDriver.findElement（IOSDriver.java:1）在io.appium.java_client.pagefactory.AppiumElementLocator.lambda $ 0（AppiumElementLocator.java:120）在io.appium.java_client.pagefactory.AppiumElementLocator $ WaitingFunction.apply（AppiumElementLocator.java:172）在io.appium.java_client.pagefactory.AppiumElementLocator $ WaitingFunction.apply（AppiumElementLocator.java:1）在org.openqa.selenium.support.ui.FluentWait.until（FluentWait.java:249）... 67更多

Answer 1

如果您要验证页面上是否显示了元素，则可以尝试以下操作：

List<WebElement> ele = driver.findElements(By.id(id));

这将返回与您提供的ID匹配的元素列表。如果列表大小大于0，则表示该元素存在于页面上。