Value for SWIFT_VERSION cannot be empty

问题

I have installed swift pods for the obj c project. I got this error when I was trying to build it.

I have gone through all the solutions like deleting derived data, cleaning the build folder. Swift Compiler_Language also missing in the XCode 10. Added user-defined setting too, even it didn't work.

回答1:

Select your app target then goto build setting, search for swift set the swift language version from the dropdown.

回答2:

In case there is anybody else reading through this thread who has this same problem but was unable to solve it using the above answers, this may help:

If you have a data model, you need to check that when you click on the data model, click on an entity, and bring up the file inspector, the "Code Generation" Language is properly set. In my case my whole app was written Objective-C, but was set here to Swift for some reason. This is another reason that Error will show up in the Issue Navigator.

It's very important to clear the build folder after changing Code Generation Language. This can be done by pressing Command-Shift-K or by clicking Product->Clean Build Folder in the menu at the top of the screen.

Check out this link for a picture of where to find the "Code Generation" option I'm talking about.

Model.xcdatamodeld->File Inspector->Code Generation

回答3:

Update for Xcode 10.2

Go to --> Build Setting
Select All + Combined or All + Levels underneath the Build Settings
And Finally on the search bar, on the right hand side search for "Swift Language Version"

回答4:

Still, after all of that, if you're still at lost, you can add a SWIFT_VERSION directly the project file:

        80B11AAAAAAAAAAAAAAAC3E5D8 /* Debug */ = {
        isa = XCBuildConfiguration;
        baseConfigurationReference = DF5...040;
        buildSettings = {
            ...
            PRODUCT_MODULE_NAME = react-native-some-module;
            ...
            SWIFT_VERSION = "4.2";
        };
        name = Debug;
    };

Repeat for both the Debug and Release targets. That had me hop over this issue.

来源：https://stackoverflow.com/questions/52950514/value-for-swift-version-cannot-be-empty

标签

swift

xcode10