NEW! Master Swift design patterns with my latest book! >>

How to read the interface orientation: portrait or landscape?

Paul Hudson       @twostraws

Apple generally doesn’t want developers to think about things like “portrait” and “landscape” because devices come in a range of sizes, and in the case of iPad you get slide over and split view on top. However, sometimes it’s just useful, particularly on iPhone where the difference between portrait and landscape is huge.

If you just want to read the current interface orientation you can do so using UIApplication.shared.statusBarOrientation, which will contain a value such as .portraitUpsideDown. Alternatively, you can use its isLandscape and isPortrait properties to check for both values of landscape or both values of portrait at once.

If you want your interface to adapt every time the user moves between landscape and portrait, you should check UIApplication.shared.statusBarOrientation inside the willTransition(to:) method, which is triggered when the trait collection of your app changes.

Something like this ought to do the trick:

override func willTransition(to newCollection: UITraitCollection, with coordinator: UIViewControllerTransitionCoordinator) {
    coordinator.animate(alongsideTransition: { context in
        if UIApplication.shared.statusBarOrientation.isLandscape {
            // activate landscape changes
        } else {
            // activate portrait changes
        }
    })
}

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.

Hacking with watchOS

Transfer your Swift skills to watchOS the easy way, and learn to build real-world apps in the process!

MASTER SWIFT NOW
Buy Practical iOS 12 Buy Pro Swift Buy Swift Design Patterns Buy Practical iOS 11 Buy Swift Coding Challenges Buy Server-Side Swift (Vapor Edition) Buy Server-Side Swift (Kitura Edition) Buy Hacking with macOS Buy Advanced iOS Volume One Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with Swift Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Beyond Code

Was this page useful? Let me know!

Average rating: 3.0/5

Click here to visit the Hacking with Swift store >>