1303: ▸ ❌; error: Value for SWIFT_VERSION cannot be empty. (in target 'UnityFramework' from project

While using UCB to build for iOS, in Unity 2019.3.1f1, getting this error:

1303: ▸ ❌; error: Value for SWIFT_VERSION cannot be empty. (in target 'UnityFramework' from project 'Unity-iPhone')


tried to add post process build -
proj.SetBuildProperty(targetGuid, "SWIFT_VERSION", "3.0");
Didn't help.

Any ideas?

 

I had a similar issue after adding the Facebook SDK (Unity 2019.3.11f1). It may be a bit hacky, but updating all swift versions in the project file itself works:

Code (CSharp):

1.  
2. string projPath = UnityEditor.iOS.Xcode.PBXProject.GetPBXProjectPath(path);            
3. string projText = File.ReadAllText(projPath);
4. projText = Regex.Replace(projText, "SWIFT_VERSION = [^;]*;" , "SWIFT_VERSION = 5.0;", RegexOptions.Multiline);
5. File.WriteAllText(projPath, projText);

 

Code (CSharp):

1. project.SetBuildProperty(targetGuid, "SWIFT_VERSION", "5.0");

 

See the post at https://forum.unity.com/threads/sol...n-using-postprocessbuild.956397/#post-6234828

I think the key is setting the property within the targetGuid from GetUnityFrameworkTargetGuid(). That snippet did the trick for me