Realm for iOS in Xcode 8 & Swift 3

[dodomarocgenex]

Goals

Use Realm 1.0.2 for a iOS Swift 3 project

Expected Results

Compile without errors or warnings

Actual Results

Compile error

ld: .../Products/Debug-iphonesimulator/RealmSwift/RealmSwift.framework/RealmSwift compiled with older version of Swift language (2.0) than previous files (3.0) for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

Steps to Reproduce

Following the steps given here

• Create an empty project
• install Realm using Coacoapods :

pod 'Realm', git: 'https://github.com/realm/realm-cocoa.git', branch: 'master', :submodules => true

pod 'RealmSwift', git: 'https://github.com/realm/realm-cocoa.git', branch: 'master', :submodules => true

• Add RLMSupport.swift into the File Navigator of the Xcode project

Version of Realm and Tooling

Realm version: 1.0.2

Xcode version: 8 beta 3

iOS version: 9.3.3

Dependency manager + version: Coacoapods 1.0.1

[austinzheng]

Hello,

Thanks for getting in touch with us.

To use Realm with Swift 3, you need to explicitly set the Use Legacy Swift Language Version flag on the CocoaPod target. This can be done by clicking on the Pods project, clicking on the RealmSwift target, going to the 'Build Settings' tab, and changing the flag to Yes. (Note that you might have set this flag on your actual project's target; you also have to set it separately on the Pod target. This is no longer necessary if you install the latest beta version of CocoaPods.)

Hope that helps.

[dodomarocgenex]

Thank you for the quick response,
I've already enabled the Use Legacy Swift Language flag in the RealmSwift target, and the error is still there.
And just to make sure, I've deleted all derived data and restarted with an empty project.

[austinzheng]

Sorry that didn't work! Here's another thing to try.

Can you go to Xcode --> Preferences --> Locations tab and make sure the Xcode 8 (not Xcode 7) command line tools are selected?

[dodomarocgenex]

Command line tools were set to Xcode 7.3.1. Setting them to Xcode 8 had no effect.

[austinzheng]

Would you be willing to send over a copy of the empty project that you say is not working? You can create an attachment and link it, or send it directly to help@realm.io.

[dodomarocgenex]

@austinzheng thank you for the support, I've managed to use Realm with Cocoapods and Xcode beta 4

[anthonycastelli]

How did you get this resolved? I am having the same issue

[dodomarocgenex]

What version of Xcode are you using? The beta 5 has been released today

[anthonycastelli]

@dodomaroc86 I was using Beta 4, downloading beta 5 now and will test that.

[anthonycastelli]

Same issue on Beta 5

[bdash]

@anthonycastelli, it's probably best to file a new issue with details of the problem you're seeing so we can help you.

[anthonycastelli]

@bdash Thats what I plan on doing soon as I get home. I thought maybe @dodomaroc86 had a few ideas since he got his working.

[dodomarocgenex]

@anthonycastelli This video from @jpsim may help https://static.realm.io/debug/realm-swift-xcode8b4.mp4