Swift version: 5.6
Show a UIAlertController
action sheet on iPad isn't as easy as on iPhone. The reason for this is simple: on iPhone the action sheet slides up from the bottom, effectively owning the user's attention until it's dismissed, whereas on iPad it could be shown from anywhere. In fact, if you just try and show one on an iPad like this, your app crashes:
let ac = UIAlertController(title: "Hello!", message: "This is a test.", preferredStyle: .actionSheet)
present(ac, animated: true)
The solution is to use a UIPopoverPresentationController
, which gets created for you when you try to access the popoverPresentationController
property of a UIAlertController
. With this, you can tell it where to show from (and what view those coordinates relate to) before presenting the action sheet, which makes it work correctly on iPad.
To rewrite the previous lines so they work, you'd do this:
let popover = ac.popoverPresentationController
popover?.sourceView = view
popover?.sourceRect = CGRect(x: 32, y: 32, width: 64, height: 64)
present(ac, animated: true)
SAVE 50% To celebrate Black Friday, all our books and bundles are half price, so you can take your Swift knowledge further without spending big! Get the Swift Power Pack to build your iOS career faster, get the Swift Platform Pack to builds apps for macOS, watchOS, and beyond, or get the Swift Plus Pack to learn advanced design patterns, testing skills, and more.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 8.0
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
Link copied to your pasteboard.