iConAssets - Easiest way to generate icons assets for iOS, OS X (including icns file), tvOS, WatchOS and Android.
Just Drag and Drop icon file in app and your icons will be generated for all selected platforms with single click.
Also generates icns and iTunesArtWork images as well.
Drag and Drop "AppIcon.appiconset" in xcode assets and it's Done.
In case of any issues please send your queries at firstname.lastname@example.org and if you are happy take a moment and review it.