I often get those messages. They should be ignored, it is just a simulator warning which you should not care about too much.
If you want to silent the warning, toggle keyboard as described here:
If you simply press:
iOS Simulator -> Hardware -> Keyboard -> Connect Hardware Keyboard
so that the entry is UNchecked then the software keyboard will be displayed once again.
Thank you, I saw that forum thread initially but worried that it wasn't correct. Good to know that I'm not the only one experiencing this and that I can just ignore it and adjust the simulator accordingly. Thanks again for your help, I appreciate it!