All arrays have a built-in method called
max(), which returns the highest item in the array. This comes with a default implementation if the elements of the array conform to
Comparable: it will simply compare all items until it finds the one that compares highest.
For example, this code puts 5 into the
let numbers = [1, 2, 3, 4, 5] let max = numbers.max()
max() can be called on an empty array, it returns an optional – you need to check and unwrap it yourself.
Available from iOS 8.0 – learn more in my book Pro Swift
Did this solution work for you? Please pass it on!
Other people are reading…
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
Become a Swift expert
I wrote a book called Pro Swift that's dedicated to helping you master the Swift language, and it includes seven hours of video demonstrating each technique!