WWDC23 SALE: Save 50% on all my Swift books and bundles! >>

How to convert a string to an NSString

Swift version: 5.6

Paul Hudson    @twostraws   

When Swift originally launched, NSString (older iOS strings) and native Swift strings were completely interchangeable, as were NSArray and Swift arrays, plus NSDictionary and Swift dictionaries. This got changed in Swift 1.2 so that you need to explicitly cast between these data types, and this remains the same in Swift today.

So, to cast between Swift strings and NSString, you need to do a simple typecast like this:

let str = "Hello"
let otherStr = str as NSString

Note that you don't need to force the typecast because the two data types are still interoperable.

Save 50% in my WWDC23 sale.

SAVE 50% To celebrate WWDC23, all our books and bundles are half price, so you can take your Swift knowledge further without spending big! Get the Swift Power Pack to build your iOS career faster, get the Swift Platform Pack to builds apps for macOS, watchOS, and beyond, or get the Swift Plus Pack to learn advanced design patterns, testing skills, and more.

Save 50% on all our books and bundles!

Available from iOS 7.0

Similar solutions…

About the Swift Knowledge Base

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

BUY OUR BOOKS
Buy Pro Swift Buy Pro SwiftUI Buy Swift Design Patterns Buy Testing Swift Buy Hacking with iOS Buy Swift Coding Challenges Buy Swift on Sundays Volume One Buy Server-Side Swift Buy Advanced iOS Volume One Buy Advanced iOS Volume Two Buy Advanced iOS Volume Three Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with macOS Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Beyond Code

Was this page useful? Let us know!

Average rating: 4.8/5

 
Unknown user

You are not logged in

Log in or create account
 

Link copied to your pasteboard.