How to swap two items in an array using swapAt()
Swift version: 5.1
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:
names.swapAt(0, 1)Note: swapAt() will trigger a fatal error if you try to swap beyond the length of the array.
LEARN SWIFTUI FOR FREE I have a massive, free SwiftUI video collection on YouTube teaching you how to build complete apps with SwiftUI – check it out!
Available from iOS 8.0
Similar solutions…
- How to add drag and drop to your app
- How to warp a sprite using SKWarpGeometryGrid
- What is a monad?
- Building a menu using List
- How to create views in a loop using ForEach
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
