PrefixHeader. pch & #39; file not found and how to add a pch file in Xcode,

PrefixHeader. pch 'file not found and how to add a pch file in Xcode,

 

During the development process, if you have access to the old project, the error 'prefixheader. pch' file not found is reported!

 

Before Xcode6, when creating a project, the system will automatically create a pch (precompile header) file named by the project name,

During the development process, the compiler will automatically add the header files in the pch file to all the source files by including the header files that are widely used throughout the project,

In this way, you can directly use the content in the header file without using import when you need to use the relevant classes, which brings programming convenience to a great extent,

But there are also some potential problems, which is also the reason why pch is not created by default after Xcode6.

 

But sometimes the pch file is still needed. How can I add a pch file in Xcode6?

 

First, Run Command + N to open the new file window: iOS-> other-> PCH file, create a pch file, and add the header file name to be introduced:

 

 

 

Second, modify the project configuration file and add the path of the just-created PCH file to the precompile header option in building setting,

Note that both debug and release columns must be added.