Xcode 10 - сворачивание кода (Xcode 10 has increased support for code folding)

A new code folding ribbon showing all of the multi-line foldable blocks of code in the editor

A new style for folded code in the editor that allows you to edit lines with folded code

Support for folding any block of code enclosed in curly braces

Support for folding blocks of code from the folding ribbon, from structured selection, or from the

Menubar ► Editor ► Code Folding ► Fold menu item