If you need to have two items in an array change places, the
swapAt() method is exactly what you want: provide it two indexes inside your array, and the items at those positions will be swapped.
For example, consider this array:
var names = ["Paul", "John", "George", "Ringo"]
If I wanted John and Paul to swap places, I’d swap positions 0 and 1, like this:
swapAt() will trigger a fatal error if you try to swap beyond the length of the array.
Sponsored You’re already busy updating your app for Swift 4.2 and iOS 12, so why not let Instabug help you find and fix bugs? Add just two lines of code to your project and receive comprehensive reports with all the feedback you need to ship a world-class app – click here to learn more!
Available from iOS 8.0
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.
Get six books for only $150
The Swift Power Pack includes my first six books for one low price, helping you jumpstart a new career in iOS development – check it out!