我有4个不同的xcode项目。我想从一个项目调用不同项目的viewcontroller。我怎么能这样做

I have 4 different XCode projects for different modules on different branches of git. I want to make a common project/app through which i can call all 4 modules. There modules are to be displayed like list in table. Through a common login all modules will be called. How can i do this?I have 4 different XCode projects for different