iOS add prefix Header

1. Add prefix Header

Note: Xcode 6 Apple removes the prefix Header by default to improve the reuse of the original file and facilitate migration. And can reduce the build time to some extent.

Workaround:

(1). Add a PCH file to the project and name Xxx-prefix.pch.

(2). Set Build Setting

Add path $ (srcroot)/Desktop folder for ' Prefix Header '/prefixheader.pch

Precompile Prefix Header is set to Yes, the PCH file is precompiled, and the precompiled PCH file is cached to improve compilation speed. Set to No, it will not.

iOS add prefix Header