How to add a flexible space to a UIBarButtonItem
Swift version: 5.1
There's a special kind of UIBarButtonItem called flexibleSpace, and this acts like a spring between other buttons, pushing them to one side. A flexible space will always expand to take up as much room as possible, splitting space evenly between other flexible spaces if they exist.
For example, if you add this button to a toolbar, it will sit on the left edge of the toolbar:
let refresh = UIBarButtonItem(barButtonSystemItem: .refresh, target: self, action: #selector(refreshTapped))If you create and add a flexible space first, then that button will be pushed to the right edge as the flexible space expands to take up most of the toolbar. Here's how you create the flexible space:
let spacer = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)SAVE 20% ON iOS CONF SG The largest iOS conference in Southeast Asia is back in Singapore for the 5th time in January 2020, now with two days of workshops plus two days of talks on SwiftUI, Combine, GraphQL, and more! Save a massive 20% on your tickets by clicking on this link.
Available from iOS 2.0 – see Hacking with Swift tutorial 4
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