How to switch to iframe on mobile Safari?(iOS)

Unable to switch into the iFrame part while automating the RWD web app in mobile safari.
i have used driver.switchTo().frame(driver.findElement(“FrameID”)));
and i am getting the console as follows

Exception in thread “main” org.openqa.selenium.WebDriverException: ‘undefined’ is not an object (evaluating ‘c.K.getElementById’) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 20.12 seconds

Please let me if any of you have solutions for this issue?

Where you able to resolve this? I have the same issue but have not found a workaround.

No.Please refer this link