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.
SPONSORED Instabug helps you identify and resolve severe crashes quickly. You can retrace in-app events and know exactly which line of code caused the crash along with environment details, network logs, repro steps, and the session profiler. Ask more questions or keep users up-to-date with in-app replies straight from your dashboard. Instabug takes data privacy seriously, so no one sees your data but you! See more detailed features comparison and try Instabug's crash reporting SDK for free.
Save 50% on all books and bundles
The biggest ever Hacking with Swift sale is now on, letting you save 50% on all books and bundles. Learn something new with Swift and enjoy great savings while the sale lasts!
