XCode 在某些文件中找不到 Swift 桥接头文件

XCode does not find Swift bridging header file in some files

提问by John S.

I do have a problem in my iOs application with XCode. It has been coded in Objective-C, and now I am working on migrating files in Swift, one after another. The code is shared between team members with a versioning system (git).

我在使用 XCode 的 iOs 应用程序中确实遇到了问题。它是用 Objective-C 编写的，现在我正在 Swift 中一个接一个地迁移文件。代码在团队成员之间使用版本控制系统 (git) 共享。

I started with the core classes and I proceed like this :

我从核心类开始，我是这样进行的：

• I write the new class in a Swift file, ex. MyClass.swift (with @objcprefix keyword)
• I replace #import "MyClass.h"by @class MyClass;in header files
• I add #import "MyProject-Swift.h"in implementation files (.m) needing it
• I delete MyClass.h and MyClass.m files
• I clean and build the project

• 我在 Swift 文件中编写了新类，例如。MyClass.swift（带@objc前缀关键字）
• 我在头文件中替换#import "MyClass.h"为@class MyClass;
• 我添加#import "MyProject-Swift.h"了需要它的实现文件 (.m)
• 我删除 MyClass.h 和 MyClass.m 文件
• 我清理并构建项目

This process has worked several times, but for some reasons some #import "MyProject-Swift.h"do not work, and I get the error : 'MyProject-Swift.h' file not found.

这个过程已经运行了几次，但由于某些原因，有些#import "MyProject-Swift.h"不起作用，我收到错误：'MyProject-Swift.h' file not found。

According to the different files causing the problem, sometimes, Ctrl+Click will open the "MyProject-Swift.h" file, sometimes not (no matter of the "not found error").

根据导致问题的文件不同，有时，Ctrl+单击会打开“MyProject-Swift.h”文件，有时不会（无论“未找到错误”）。

But the file exists and the translated Swift code is present inside it.

但是该文件存在并且其中包含翻译后的 Swift 代码。

Another thing really weird, I tried to re-create new .h and .m files from those using #import "MyProject-Swift.h"stuff and having the problem, and after that it works (sometimes not, and I get other errors) !

另一件非常奇怪的事情，我试图从那些使用#import "MyProject-Swift.h"东西并遇到问题的人重新创建新的 .h 和 .m 文件，然后它就可以工作了（有时不行，而且我遇到了其他错误）！

As it works in some cases, I really don't get why it is causing problems for other cases. Of course I searched among dozens of topics but did not find anyone with the same problem.

由于它在某些情况下有效，我真的不明白为什么它会导致其他情况出现问题。当然，我搜索了几十个主题，但没有找到任何有同样问题的人。

Could it be an XCode settings issue, or because of different XCode versions between team developers ?

可能是 XCode 设置问题，还是因为团队开发人员之间的 XCode 版本不同？

Any idea ?

任何的想法 ？

Thanks

谢谢

Edited :

编辑：

I complete the issue description with another point of view.

我从另一个角度完成了问题描述。

I do have the project in a working state : uses some of my new Swift files, it builds and runs well (some Objective-C files use Swift files).

我的项目确实处于工作状态：使用我的一些新 Swift 文件，它构建和运行良好（一些 Objective-C 文件使用 Swift 文件）。

I know a certain .m file having the issue :

我知道某个 .m 文件有问题：

• I add #import "MyProject-Swift.h"at the beginning, nothing else
• XCode says 'MyProject-Swift.h' file not found, Ctrl+Click does not work, and the project won't build
• But, if I click on the button with four little squares (top left of the editor), in the displayed menu I have "Includes", the "MyProject-Swift.h" is listed under it, and clicking on "MyProject-Swift.h" opens the file !

• 我#import "MyProject-Swift.h"在开头加上，没有别的
• XCode 显示未找到“MyProject-Swift.h”文件，Ctrl+单击不起作用，项目将无法构建
• 但是，如果我点击带有四个小方块的按钮（编辑器的左上角），在显示的菜单中我有“包含”，“MyProject-Swift.h”列在它下面，然后点击“MyProject-Swift .h”打开文件！

Replacing #import "MyProject-Swift.h"by #import <MyProject-Swift.h>won't change anything.

更换#import "MyProject-Swift.h"由#import <MyProject-Swift.h>不会改变任何东西。

I also have this case sometimes : Ctrl+Click opens "MyProject-Swift.h", but XCode says 'MyProject-Swift.h' file not found(it won't build as well).

我有时也有这种情况：Ctrl+单击打开“MyProject-Swift.h”，但 XCode 说找不到“MyProject-Swift.h”文件（它也不会构建）。

采纳答案by John S.

I finally came up with the solution on my own : the project.pbxproj file was kind of corrupted after some git merge I guess. Some files of the project were referenced twice in that file, so I deleted the ones I thought being bad (maybe randomly chosen is closer from the truth).

我终于想出了自己的解决方案：我猜在一些 git merge 之后，project.pbxproj 文件有点损坏。该项目的某些文件在该文件中被引用了两次，所以我删除了我认为不好的那些（可能随机选择的更接近事实）。

Now it's working like a charm.

现在它就像一个魅力。

In fact this had no effect on the project until I tried to migrate files to Swift !

事实上，在我尝试将文件迁移到 Swift 之前，这对项目没有影响！

It would be a great idea to have a tool or function in XCode to reset this project.pbxproj file to the current things we have.

在 XCode 中有一个工具或函数来将此 project.pbxproj 文件重置为我们拥有的当前内容将是一个好主意。

回答by Nikolay Shubenkov

basing on thatasumption https://stackoverflow.com/a/31540611/2150954I solved this problem in this simple way

立足于那个asumption https://stackoverflow.com/a/31540611/2150954我在这解决了这个问题的简单方法

Find objective C file, in which compiler claims that it can not find YourProject-Swift file there. Removeit file from project and then add.

找到目标 C 文件，编译器声称在该文件中找不到 YourProject-Swift 文件。从项目中删除它的文件，然后添加.

After that my project successfully compiled and run

之后我的项目成功编译并运行

回答by Bhumesh Purohit

1. Add a header file to your project, named [MyProjectName]-Bridging-Header.h.This will be the single header file where you import any Objective-C code you want your Swift code to have access to.

2. In your project build settings, find Swift Compiler – Code Generation, and next to Objective-C Bridging Header add the path to your bridging header file, from the project's root folder. So it could by MyProject/MyProject-Bridging-Header.hor simply MyProject-Bridging-Header.hif the file lives in the project root folder.

1. 向您的项目添加一个名为[MyProjectName]-Bridging-Header.h的头文件。这将是单个头文件，您可以在其中导入您希望 Swift 代码访问的任何 Objective-C 代码。

2. 在您的项目构建设置中，找到 Swift Compiler – Code Generation，然后在 Objective-C Bridging Header 旁边从项目的根文件夹中添加到您的桥接头文件的路径。所以它可以通过MyProject/MyProject-Bridging-Header.h或简单的MyProject-Bridging-Header.h如果文件位于项目根文件夹中。

You only need one Bridging Header. Add your #import statements to this file, and your classes will now be available in your Swift code without any extra import statements.

您只需要一个桥接头。将您的 #import 语句添加到此文件中，您的类现在可以在您的 Swift 代码中使用，而无需任何额外的导入语句。

回答by prad

If you have two targetsand you keep getting compile/semantic errors for newly edited swift files used in ObjC code, this could be the problem -

如果您有两个目标，并且在 ObjC 代码中使用的新编辑的 swift 文件不断出现编译/语义错误，这可能是问题所在 -

You got two <ProjectName>-swift.hfiles. Like in mycase: MyProject-swift.hand MyProjectSandbox-swift.hThese are the files with all the swift classes and methods. (These open up when you Command-click on any swift class from Obj-C code).

你有两个<ProjectName>-swift.h文件。就像在 mycase: MyProject-swift.handMyProjectSandbox-swift.h这些是包含所有 swift 类和方法的文件。 （当您在 Obj-C 代码中按 Command 键单击任何 swift 类时，这些会打开）。

So I am working on the Sandboxtarget. I found that, when I made changes to swift files and clean-build, only MyProjectSandbox-swift.hwas being updated. But the main problem was the ObjC code was referring to MyProject-swift.hfile which does not update as I was only rebuilding the (sandbox)target I was working on..

所以我正在研究Sandbox目标。我发现，当我对 swift 文件和 clean-build 进行更改时，只有MyProjectSandbox-swift.h被更新。但主要问题是 ObjC 代码指的MyProject-swift.h是没有更新的文件，因为我只是在重建我正在处理的（沙箱）目标。

TL;DR;

TL; 博士;

So the solution is to make sure you clean and rebuild BOTHyour targets so that both (MyProject-swift.hand MyProjectSandbox-swift.h) are updated with latest swift code and classes.

因此，解决方案是确保您清理和重建两个目标，以便 (MyProject-swift.h和MyProjectSandbox-swift.h) 都使用最新的 swift 代码和类进行更新。

This will update both files and your ObjC code won't show any irrelevant compile errors for swift files.

这将更新这两个文件，并且您的 ObjC 代码不会显示任何与 swift 文件无关的编译错误。