目标 C 到多目标的 Swift 头文件

我通过 import 语句成功地从 Objective C (目标“ MyApp”)调用了 Swift 类:

#import "MyApp-Swift.h"

我现在创建了一个新的目标，叫做“ MyAppLite”

当我编译新目标时，我会得到错误，因为代码需要“ MyApp-Swift.h”，但编译器正在创建“ MyAppLite-Swift.h”

因此，我需要为正在编译的目标创建一个条件 Swift/OBC 头 #import。

如何才能做到这一点，还是有更好的办法？

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小开

Well, the only way I can fix is to...

#ifdef IS_LITE
#import "MyApp_Lite-Swift.h"
#else
#import "MyApp-Swift.h"
#endif

Note that if there's any 'illegal' chars in my Product Module Name, they need to be replaced with underscores.

Hope that helps!

小开
最佳答案

It is also possible to set the Product Module Name setting in Build Settings to be the same across your modules (I set it to $(PROJECT_NAME)), so that the <project>-Swift.h file that is generated has the same name across all modules. This eliminates the need for adding/checking preprocessor macros.

小开

The best way I've found to address this issue is in your Xcode shared project settings. You can search for the following setting:

Objective-C Generated Interface Header Name*

If you set that value to a common header name, such as "MyProject-Swift.h", it will be applied to each of your targets and you can safely use the import declaration in any of your Objective-C files. This allows you to continue using unique product module names for each target, if needed.

I've tested this in Xcode Version 6.4 (6E35b).

*Note: This will appear under your Swift compiler settings, which are only visible if you have Swift source files added to your project. Additionally, if a target doesn't have any Swift source associated with it, the Swift compiler options will not be visible for that target's build settings.

Good luck!

小开

I put the appropriate #import <project>-Swift.h statement in a prefix header file (<project>-Prefix.pch) defined/added for each build (target/scheme).

小开

Previous answers have some problems if you decide to rename your targets or project, or use SWIFT_MODULE_NAME as intended.

The most universal solution is to change SWIFT_OBJC_INTERFACE_HEADER_NAME (“Objective-C Generated Interface Header Name”) under Project's, not Targets, Build Settings, to:

  • $(PROJECT_NAME)-Swift.h — one per project;
  • $(SWIFT_MODULE_NAME)-Swift.h — one per module (default value).

enter image description here

小开

The only working way is the following :

1- from first target (which has a working bridging) Build Setting select Objective C Bridging Header
2- Copy Objective C Bridging Header
3- open the other target Build Setting
4- Paste it 5- change the header file to your new header file (i.e target B.h)

(now you have this option for two target)

小开

pickture will tell you all

  1. second targets name xxx and xxx-ih

enter image description here

  1. select first target tap build setting -> find Objective-C Bridging Header set xxx-bridging-Header.h and Objective-C Generated Interface Header Name set xxx-Swift.h enter image description here

  2. select second target and same step 2 enter image description here


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