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This discussion is to help me write an article on PCH files and how to write frameworks with them. With a properly configured PCH file, you no longer have to import hearders in source files contained within a framework target. Some of the questions I have about PCH files are:

*What is the role of the @class keyword. Does the compiler still need these hints for static typing? *What if any headers are now required for each individual class header (see the next item for a better context of this item). *What headers should be imported in the prefix header? Is it ok to import all the headers in a project? *Should protocols now be precompiled?