我正在自动化针对Android和iOS的测试。最近（可能是在更新至appium 1.9.1和java-client 6.1.0之后），iOS测试出现了问题。
许多测试失败，因为找不到WebElement。我正在使用WebDriverWait查找此示例中的元素：
private WebElement getWebElement(By by, int timeOutInSeconds) {
return (new WebDriverWait(appiumDriver, timeOutInSeconds)).until(ExpectedConditions.presenceOfElementLocated(by));
}
测试不再等待找到元素了。而是立即引发异常。
我在iOS上使用XCUITest，在android上使用uiautomator2。在android上，测试仍然可以。
编辑（2018-10-29 18:33）：
感觉页面工厂正在报告该元素存在，然后randomElement.isDisplayed()将在该元素上执行，因为它找不到该元素，将直接引发错误。
另一个观察结果：
在某些情况下，等待时间在iOS上可以正常运行，但是我还找不到模式。
编辑（2018-12-14 15:56）：
仍然找不到解决方案。注意：我的测试会在失败时截图。我可以在许多屏幕截图中看到导致失败的元素。日志说找不到它们，但是我可以清楚地在屏幕上看到它们。没有意义。希望有想法！
修改（2019年1月11日15:05）：
在日志中，看起来好像找到了该元素（响应200），但是当我要单击时，它说它“在屏幕上不可见，因此不可交互”。
...
[HTTP] --> POST /wd/hub/session/59e9ace4-55a5-4b07-ad0e-af874dc42a6d/element
[HTTP] {"using":"id","value":"myapp"}
[debug] [W3C] Calling AppiumDriver.findElement() with args: ["id","buttonNext","59e9ace4-55a5-4b07-ad0e-af874dc42a6d"]
[debug] [XCUITest] Executing command 'findElement'
[debug] [BaseDriver] Valid locator strategies for this request: xpath, id, name, class name, -ios predicate string, -ios class chain, accessibility id
[debug] [BaseDriver] Waiting up to 0 ms for condition
[debug] [JSONWP Proxy] Matched '/element' to command name 'findElement'
[debug] [JSONWP Proxy] Proxying [POST /element] to [POST http://localhost:8100/session/CE691ADA-FC54-48AE-9AA0-1DA6212DB2CC/element] with body: {"using":"id","value":"buttonNext"}
[debug] [JSONWP Proxy] Got response with status 200: {"value":{"ELEMENT":"24010000-0000-0000-0308-000000000000"},"sessionId":"CE691ADA-FC54-48AE-9AA0-1DA6212DB2CC","status":0}
[debug] [W3C] Responding to client with driver.findElement() result: {"element-6066-11e4-a52e-4f735466cecf":"24010000-0000-0000-0308-000000000000"}
[HTTP] <-- POST /wd/hub/session/59e9ace4-55a5-4b07-ad0e-af874dc42a6d/element 200 180 ms - 88
[HTTP]
[HTTP] --> POST /wd/hub/session/59e9ace4-55a5-4b07-ad0e-af874dc42a6d/element/24010000-0000-0000-0308-000000000000/click
[HTTP] {"id":"24010000-0000-0000-0308-000000000000"}
[W3C] Driver proxy active, passing request on via HTTP proxy
[debug] [XCUITest] Executing command 'proxyReqRes'
[debug] [JSONWP Proxy] Matched '/wd/hub/session/59e9ace4-55a5-4b07-ad0e-af874dc42a6d/element/24010000-0000-0000-0308-000000000000/click' to command name 'click'
[debug] [JSONWP Proxy] Proxying [POST /wd/hub/session/59e9ace4-55a5-4b07-ad0e-af874dc42a6d/element/24010000-0000-0000-0308-000000000000/click] to [POST http://localhost:8100/session/CE691ADA-FC54-48AE-9AA0-1DA6212DB2CC/element/24010000-0000-0000-0308-000000000000/click] with body: {"id":"24010000-0000-0000-0308-000000000000"}
[debug] [JSONWP Proxy] Got response with status 200: {"value":"Error Domain=com.facebook.WebDriverAgent Code=1 \"The element '\"buttonNext\" Button' is not visible on the screen and thus is not interactable\" UserInfo={NSLocalizedDescription=The element '\"buttonNext\" Button' is not visible on the screen and thus is not interactable}","sessionId":"CE691ADA-FC54-48AE-9AA0-1DA6212DB2CC","status":13}
[debug] [W3C] Encountered internal error running command: ProxyRequestError: Could not proxy command to remote server. Original error: The request to /wd/hub/session/59e9ace4-55a5-4b07-ad0e-af874dc42a6d/element/24010000-0000-0000-0308-000000000000/click has failed
[debug] [W3C] at JWProxy.proxy$ (/usr/local/lib/node_modules/appium/node_modules/appium-base-driver/lib/jsonwp-proxy/proxy.js:182:13)
[debug] [W3C] at tryCatch (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:67:40)
[debug] [W3C] at GeneratorFunctionPrototype.invoke [as _invoke] (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:315:22)
[debug] [W3C] at GeneratorFunctionPrototype.prototype.(anonymous function) [as next] (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:100:21)
[debug] [W3C] at GeneratorFunctionPrototype.invoke (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:136:37)
[debug] [MJSONWP] Matched JSONWP error code 13 to UnknownError
[HTTP] <-- POST /wd/hub/session/59e9ace4-55a5-4b07-ad0e-af874dc42a6d/element/24010000-0000-0000-0308-000000000000/click 500 4875 ms - 1779
[HTTP]
[HTTP] --> GET /wd/hub/session/59e9ace4-55a5-4b07-ad0e-af874dc42a6d/screenshot
[HTTP] {}
...