How to convert a Substring to a String
Swift version: 5.6
Swift has a dedicated Substring type (String.SubSequence) that is designed to hold slices of strings, which is a performance optimization: when you store part of a string in a different variable, Swift can simply point the substring at the parent string rather than copy all the data.
However, while substrings can be used in many of the same ways as regular strings, they aren’t the same – if you have a function that accepts a String as a parameter, you simply cannot send it a Substring.
To fix this, you can wrap your substring in a String initializer like this:
let quote = "The revolution will be Swift"
let substring = quote.dropFirst(23)
let realString = String(substring)TAKE YOUR SKILLS TO THE NEXT LEVEL If you like Hacking with Swift, you'll love Hacking with Swift+ – it's my premium service where you can learn advanced Swift and SwiftUI, functional programming, algorithms, and more. Plus it comes with stacks of benefits, including monthly live streams, downloadable projects, a 20% discount on all books, and free gifts!
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Available from iOS 8.0
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This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
