Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Build a Vending Machine App in Swift Loading Data From a Resource Finishing Touches

ERROR: SWIFT_VERSION 3.0 is unsupported, supported versions are: 4.0, 4.2, 5.0

I can’t get this error to go away. I go into the build settings and change the swift language version, and still can’t get the error to go away. Any help would be much appreciated.

1 Answer

After you click okay on the Unsupported Swift Version dialog box, from the project explorer (folder icon on the left) click the topmost project file. Go to Build Settings, under the Swift Compiler - Language section change it to Swift 4 or later. When you change the version, some errors and warnings due to code depreciation, you will need to address them. First, select the Warning Icon from the toolbar on the left (same row as the folder icon earlier). Choose update recommended settings and perform changes. Then select Migrate "ProjectName.xcode" and then Migrate from the dialog box which appears. You should be good to go after this. Again there will be some warnings and errors for depreciated code.