Comments

Comments are used to include nonexecutable code in text, such as notes and reminders.

// This is a simple comment.

A multiline comment can be started with /* and ended with */.

/* This is a comment written 
over a whole big long
bunch of lines. */

Xcode recognizes special comment syntax and can display these comments in a file’s quick-jump dropdown bar.

MARK can be used to display a comment in the bar:

// MARK: View Set Up

A dash (-) can be added to display a line above the comment:

// MARK: - View Set Up

A bar without a comment can be added with a simple dash:

// MARK: -

TODO is used to display a reminder of something that needs to be done:

// TODO: Update logic to accommodate data changes.

FIXME is used to display a reminder of something that needs to be fixed:

// FIXME: Fix glitchy behavior when making changes to an existing entry.

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