How can I fold blocks of comments in Swift using Xcode the way I do it in Visual Studio?

Question

Edit: It seems to be a bug which only occurs while using Xcode in combination with Swift. In Objective-C it seems to work fine. I sent out a bug report and will post the news from apple.

I started programming Swift 2 in Xcode after some time programming C++ in Visual Studio.

But I can't find a proper way to get the comments the way I did them in Visual Studio.

Sometimes I just want to comment things out and don't want to see them again until I decide otherwise so I have free space to think about a new approach to a problem. In this way I'm not distracted and find a better solution much easier. And if I don't find a more suitable solution I can still the use the "backup" within seconds.

How can I achieve this - which I have done in Visual Studio - in Xcode6 and Xcode7 Beta?

Here is a Screenshot which illustrates commenting in Visual Studio 2015:

I just want these tiny snippets which use one line of code and can easily be opened and uncommented.

I haven't found a solution for this problem anywhere. I only found some methods which seemed to work in an older version of Xcode but not anymore. Please be so kind and check them in your latest version of Xcode before you post them because I already got some methods which are apparently not longer working.

Answer 1

The folding of comments in both Swift and Objective-C works in Xcode 9, by clicking in the comment and then pressing command+option+←.

For earlier Xcode versions, see my original answer below.

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In Xcode versions before Xcode 9, comment folding didn't work for Swift, but rather only worked for Objective-C. (And the original question didn't specify the language.) And for it to work with Objective-C in Xcode 8 and earlier, you needed to turn on the code folding option under "Text Editing" in "Preferences":

(In Xcode 9, code folding is always enabled and this option does not appear in Preferences.)

Then you can collapse the Objective-C comments by pressing command+option+← (or in Xcode versions prior to 9, you can click in the folding area in the left margin):

Answer 2

Currently (as of Xcode 7.2), you cannot fold Swift source files.

To fold Objective-C comments, you need to use a style of comment that has a begin and end like this:

/* Start comment
End comment */

Then, on the line where the comment begins, hover your cursor over the tiny column next to the line number, and click the arrow to fold it. Click the arrow again to unfold it.