NEW: My new book Pro SwiftUI is out now – level up your SwiftUI skills today! >>

Properties and methods of strings

We’ve used lots of strings so far, and it turns out they are structs – they have their own methods and properties we can use to query and manipulate the string.

First, let’s create a test string:

let string = "Do or do not, there is no try."

You can read the number of characters in a string using its count property:

print(string.count)

They have a hasPrefix() method that returns true if the string starts with specific letters:

print(string.hasPrefix("Do"))

You can uppercase a string by calling its uppercased() method:

print(string.uppercased())

And you can even have Swift sort the letters of the string into an array:

print(string.sorted())

Strings have lots more properties and methods – try typing string. to bring up Xcode’s code completion options.

Hacking with Swift is sponsored by Stream

SPONSORED Build Chat messaging quickly with Stream Chat. The Stream iOS Chat SDK is highly flexible, customizable, and crazy optimized for performance. Take advantage of this top-notch developer experience, get started for free today!

Click here

Sponsor Hacking with Swift and reach the world's largest Swift community!

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.