How to convert a Substring to a String
Swift version: 5.0
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)SPONSOR Tired of wasting time debugging your Swift app? Instabug’s SDK is here to help you minimize your debugging time by providing you with complete device details, network logs, and reproduction steps with every bug report. All data is attached automatically. It only takes a line of code to setup. Get started for free.
Available from iOS 8.0
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