How can Xcode debug files not in the working project

I'm using Unreal Engine to build a game, most parts are done in Visual Studio in windows, except build the iPhone release.

The Xcode project contains nothing 开发者_如何学编程but an Info.plist and the Game.app, which is build with external gcc & g++ commands. I can choose "Run without Building" in XCode to run and debug on real device.

As a result of that project structure, I cannot easily navigate between file, the only thing I found for now is click "Pause" in debugging window, then use "Step In", "Step Over" and "Step Out". There for I'm limited to where the app paused and related code.

I can set break points by clicking on line numbers, but gdb break command does not work. So I can't find files from breakpoints.

So that leads to my problem, how can I navigate in files that actually built the app when they are not in the solution?

Thank you.

It turns out I can actually use break filename:linenumber to add a break point, program will break there, even if it does not work at Xcode's break point view.

I think it's also how everybody else debug there UDK games.