Design+Code has recently released a new Sketch UI kit for iPhone X based on iOS11. Freebie provides both light and dark UI versions.
Components, layouts and typography have been designed accordingly with Apple’s Human Interface Guidelines. The naming convention of each component strictly follows Apple Developer Documentation so you can get familiar with it when you implement your designs in Xcode.
They present this product as “the most comprehensive iOS 11 UI Kit for Sketch”: let’s download it to find out if that’s true!