Ios-.pch How to use

What we're going to say today is that. pch This file I believe everyone is not unfamiliar, because if it is a novice development engineer will always be made to report errors.

So we need to know. What is a PCH, plainly, is a precompiled file, before running the program, to the original files and other files to pre-compile, that is, the first place to compile.

Then some people will ask, how it is used, why I use the problem.

Let's start by creating a new. pch to our project and see what it does!

1. Create a. pch file

2. Modify the precompiled header file path

3. Introduce a class in the. pch to create a class directly in another class see if it's OK!

Let's try it and get it done.

Ios-.pch How to use