objective-c - cocoapods 引用的包，一会@import, 一会import ""，是我打开方式不对？

Question

引入了几个包，在代码里引用的时候，有的需要

@import module;

有的需要

imoprt <module>

有的需要

import "module.h"

搞得人都屌乱了，这里面有什么原则没有？什么时候用什么方式？

Answer 1

@import is modules syntax. Use "Language - Modules." in Xcode to set Enable Modules and Link Frameworks Automatically to Yes, which can support @import syntax

#import<> is the header file in the system framework, and "" is the header file in the project.

Answer 2

Are you using a new version of Xcode? Just add something to this

Answer 3

<> The search starts from the system framework
"" starts from the project itself
Old versions can be mixed, but the search speed is different
I don’t know what the unsigned ones are, I only know these