Developing Mac OS or iPhone apllication

I am working for a game studio that is specialized in game on mobile devices. Our engine already works fine on iPhone and Mac OS but for currently we are using XCode to build it. We also use Visual Studio under Windows.
All our tools are made with Qt and we already use Qt creator under Windows to build some tools because it's easier for debugging Qt applications.

Ideally it will be perfect if we can only use Qt creator as IDE on all platforms, but we have some requirements :
1) Building objective-C codes with Qt creator (for OS specific code under Mac OS and iOS)
2) Making rom for iOS release
3) Debugging iOS application with simulator or devices

Note we don't want use Qt on iOS, just be able to use the complete tool chain.

I need to know which of our requirements are supported and how (plugin,...)?