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 Would you describe yourself as knowledgeable, but struggling when you have to come up with your own code? Fernando Olivares has a new book containing iOS rules you can immediately apply to your coding habits to see dramatic improvements, while also teaching applied programming fundamentals seen in refactored code from published apps.
Sponsor Hacking with Swift and reach the world's largest Swift community!
