Xcode 9:无法在Swift 4.0中导入使用Swift 3.1编译的模块

After updating to Xcode 9, I tried to build one of my projects.

在更新到Xcode 9之后，我尝试构建我的一个项目。

I use the FacebookLogin pod. I have a compiler error in FacebookLogin/LoginButton.swift

我使用FacebookLogin pod。我在FacebookLogin/LoginButton.swift中有一个编译错误

@testable import FacebookCore
❌ Module compiled with Swift 3.1 cannot be imported in Swift 4.0

In my target's build settings, the Swift language version is set to Swift 3.2.

在我的目标的构建设置中，Swift语言版本被设置为Swift 3.2。

I guess I need to wait for Facebook to update their pod ? Or any other suggestion ?

我想我需要等Facebook更新他们的pod ?还有其他建议吗?

Thanks !

谢谢!

14 个解决方案

#1

I would like to add that if you are using Carthage to compile a module in Swift 3.2 you should go to a terminal and run:

我想补充一点，如果您正在使用Carthage编译Swift 3.2中的一个模块，那么您应该到一个终端运行:

sudo xcode-select --switch /Applications/Xcode-beta.app/Contents/Developer

To use the Xcode 9 command line tools, then you can run:

要使用Xcode 9命令行工具，可以运行:

carthage update NameOfTheLibrary --platform iOS --no-use-binaries

This will compile the library with your current command line tools, it can be a bit slow but now the project should build.

这将使用当前的命令行工具编译库，它可能有点慢，但是现在项目应该构建了。

Note

请注意

To revert and use your stable Xcode command line tools simply run:

要还原并使用稳定的Xcode命令行工具，只需运行:

sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer

#2

Xcode 9 comes with a Swift 4 compiler that understands both Swift 3.2 and swift 4, it even lets you mix and match between the 2 versions. Unfortunately, other versions aren't supported.

Xcode 9附带了一个理解Swift 3.2和Swift 4的Swift 4编译器，它甚至允许您在两个版本之间进行混合和匹配。不幸的是，不支持其他版本。

Even if you set your language to Swift 3.2, it uses the Swift 4 compiler.

即使您将您的语言设置为Swift 3.2，它也使用Swift 4编译器。

If you're using cocoapods, you can add this to the end of your pod file to force the pods to use Swift 3.2 or 4.0:

如果您正在使用cocoapods，您可以将这个添加到pod文件的末尾，以迫使pod使用Swift 3.2或4.0:

post_install do |installer|
    installer.pods_project.targets.each do |target|
        target.build_configurations.each do |config|
            config.build_settings['SWIFT_VERSION'] = '3.2'
        end
    end
end

Alternatively, you could put the files from the pod directly into your project temporarily, until FacebookLogin is updated to Swift 3.2 or 4.

或者，您可以暂时将pod中的文件直接放入项目中，直到FacebookLogin更新为Swift 3.2或4。

Note: Edited based on Matt's feedback

注:根据马特的反馈进行编辑

#3

Maybe you can clean the target before you build it. It works fine for me.

也许您可以在构建目标之前清理它。对我来说很好。

#4

Doing a "clean build folder" and restarting Xcode 9 cleaned up the error for me. Also the error didn't stop the app from running on my device or the simulator.

执行“清理构建文件夹”并重新启动Xcode 9为我清除了错误。此外，这个错误并没有阻止应用程序在我的设备或模拟器上运行。

#5

I ran into the same issue on Xcode 9 Beta 3, which pointing to 'Alamofire' and tried a few different solutions, the easiest one i found is

我在Xcode 9 Beta 3上遇到了同样的问题，它指向“Alamofire”，并尝试了几种不同的解决方案，我找到的最简单的解决方案是。

1. CMD+SHIFT+K to clean the build
2. Restart Xcode 9 <-- make sure you do this step, that's critical. `

#6

goto xcode DerivedData directory then remove all file inside it and recompile your project . it work for me .

goto xcode DerivedData目录然后删除其中的所有文件并重新编译项目。这对我很有效。

and default DerivedData directory is :~/Library/Developer/Xcode/DerivedData.

默认的DerivedData目录是:~/Library/Developer/Xcode/DerivedData。

#7

If using Carthage , Open terminal and;

若使用迦太基，则打开终端;

carthage update --platform iOS --no-use-binaries

If using Pod , Open terminal and;

如使用Pod，则打开终端;

pod update

(Also if don't work in pod, you can change SWIFT_VERSION in podfile Ex:

(如果不使用pod，也可以在podfile Ex中更改SWIFT_VERSION:

config.build_settings['SWIFT_VERSION'] = '3.2'

)

After;

后;

Open Xcode and use;

打开Xcode,使用;

Command+Option+Shift+K

#8

It works for me.

它适合我。

1.Clean your project in Xcode 8

1。在Xcode 8中清理项目

2.Build or run your project in Xcode 9

2。在Xcode 9中构建或运行项目

#9

I cleaned the project in Xcode 9, and then run the app, it works.

我在Xcode 9中清理了项目，然后运行应用程序，它工作了。

#10

I had the same problem with Xcode 9 GM and this solved my problem: Remove it from the project and drag it again into "Embedded Binaries".

我对Xcode 9 GM也有同样的问题，这解决了我的问题:将它从项目中删除，并再次将它拖放到“嵌入式二进制文件”中。

#11

I have

我有

pod 'FBSDKCoreKit'
pod 'FBSDKLoginKit'
pod 'FBSDKShareKit'

in my project and import FBSDKLoginKit, after cleaning the target i didn't have any issue

在我的项目和导入FBSDKLoginKit中，在清理完目标后我没有任何问题

Since the pod you are using is in swift and is a beta pod, it is likely that you would have some issues with the swift 4 compiler, you should use the objective-c version of the pod for the time being

由于您正在使用的pod是在swift中，并且是beta pod，所以您可能会对swift 4编译器有一些问题，所以您应该暂时使用pod的objective-c版本

#12

If you use from Pod:

如果您使用Pod:

In Podfile comment FacebookLogin pod
在Podfile中评论FacebookLogin pod
pod install

圆荚体安装
In Podfile uncomment FacebookLogin pod
在Podfile中取消对FacebookLogin pod的注释
pod install

圆荚体安装
Run again your project
再次运行您的项目

#13

For my case - the actual pod referenced a static zip with prebuilt binaries targeting swift 3.1. So only solution is to rebuild the framework with source from xcode 9.

对于我的案例——实际的pod引用了一个静态的zip文件，其中包含针对swift 3.1的预构建二进制文件。因此，唯一的解决方案是使用xcode 9的源代码重新构建框架。

https://github.com/AudioKit/AudioKit/issues/980

#14

Clean Build Folder

清洁建立文件夹

Cmd + option + shift + K

#1