Just new with UE4. Search around on google and found that we can build iOS apps on pc but still need a real mac or virtual mac for remote control, is it right?
Currently if you want to modify C++ code, then you need a Mac so we can compile there; if your project only has blueprints/materials (no source code changes) then you should be able to do it all on PC. No debugger though 
However I’ll ask the main iOS guy to chime in if there’s any other info.
Just tried again with new Blueprint FPS and got this problem
LogPlayLevel:Display: IPhonePackager: IPP ERROR: Failed to find stub IPA ‘D:\Projects\UnrealEngine-4.4.3-release\Engine\Binaries\IOS\UE4Game.stub’
How could I fix it?
Probably the quickest way to get an answer is to open a thread (or search) on http://answers.unrealengine.com/