Keyboard shortcut for code folding in Xcode 9 - keyboard-shortcuts

Question

Code folding doesn't work with key binding Shift + Alt + Cmd + <- left in Xcode 9.
Is anyone having same problem with Xcode 9?

Answer 1

Updates in Xcode 10:
Xcode 10 has increased support for code folding, including:
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
Look at this snapshot:
Code folding was disabled in Xcode 9 beta 1, which is working now, in Xcode 9 Beta5 according to beta release note: Resolved in Xcode 9 beta 5 – IDE
Here is how:
Press and hold ⌘ (command) button in keyboard and move/hover mouse cursor on any (start or end) braces. It will automatically highlight, block area.
Keep (hold) ⌘ (command) button in pressed condition and click on highlighted area. It will enable quick menu popover window with Fold option.
Select Fold from menu list. It will fold your code and shows 3 dots, folding/covering entire block.
Now, to again unfold your code block, release ⌘ (command) button and click on 3 dots folding a block.
For easy understanding, look at this snapshot:
It's all keyboard short cuts are also working.
Fold ⌥ ⌘ ← option + command + left arrow
Unfold ⌥ ⌘ → option + command + right arrow
Unfold All ⌥ U option + U
Fold Methods & Functions ⌥ ⌘ ↑ option + command + up arrow
Unfold Methods & Functions ⌥ ⌘ ↓ option + command + down arrow
Fold Comment Blocks ⌃ ⇧ ⌘ ↑ control + shift + command + up
Unfold Comment Blocks ⌃ ⇧ ⌘ ↓ control + shift + command + down
Focus Follows Selection ⌃ ⌥ ⌘ F control + option + command + F
Fold All ⌘ ⌥ ⇧ ← command + option + shift + left
Unfold All ⌘ ⌥ ⇧ → command + option + shift + left
Code folding options from Xcode Menu:
Menubar ► Editor ► Code Folding ► "Here is list of code folding options"
Here is ref snapshot:
Same options from Xcode Short-cut list:
Menubar ► Xcode ► Preferences ► Key Bindings ► "Here is list of code folding short-keys"

Answer 2

Code folding is one a long list of things that isn't implemented in the new editor yet.
UPD:
Now after release of Xcode 9 code folding works now with former shortcut ( Shift + Alt + Cmd + left arrow)
Note: For only folding the scope you are in, press Alt + Cmd + left arrow.

Answer 3

It is the missing code-folding ribbon that is really making things incredibly difficult. I wouldn't have 'upgraded' if I had known.

Answer 4

According to release notes. Code folding is not supported in Xcode 9.0.
The source editor in this beta version of Xcode 9.0 doesn’t support code folding. (29396003).
And as with all beta software, there are lots of open issues that are well documented in beta release notes.