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How to trim whitespace in a string

Swift version: 5.6

Paul Hudson    @twostraws   

It's not hard to trim whitespace from a string in Swift, but the syntax is a little wordy – or "self-descriptive" if you're feeling optimistic. You need to use the trimmingCharacters(in:) method and provide a list of the characters you want to trim. If you're just using whitespace (tabs, spaces and new lines) you can use the predefined whitespacesAndNewlines list of characters, like this:

let str = "  Taylor Swift  "
let trimmed = str.trimmingCharacters(in: .whitespacesAndNewlines)

That will set trimmed to be "Taylor Swift”.

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This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.

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