PCH file, pch File

PCH file, pch File

1. Introduction

The PCH file is a global reference shared file in Xcode programming. The header file or macro definition can be introduced here to facilitate access to multiple files in the program.

 

2. Create a PCH File

Open Project New File... -> IOS Other-> PCH File: Enter the PCH File name.

 

3. PCH file configuration

A. Find the Project> Build Settings and search for "Prefix Header".

B. Project name/PrefixHeader. pch (for example, weihuan/PrefixHeader. pch );

C. Change the Precompile Prefix Header to YES. The pre-compiled pch file will be cached to increase the compilation speed;

NOTE: If TARGETS is not selected as FastRenterTests, you should select FastRenter. Otherwise, the imported class file cannot be found.

 

4. Commonly Used PCH files

① Import the header file;

② Write common macros;

③ Define common constants;

 

 

5. Custom file name prefix settings when creating a file