SFSafariViewController improvements in iOS 15
There's an option to run custom extension on the page content and also preload some content.Published: June 12, 2021 Sponsored Get the app
Let's look at two new additions to
SFSafariViewController. As a reminder this is a class that lets us display a webpage inside our app with familiar look to the Safari browser. It is way easier to use than full-fledged
One of the new options lets us start loading pages before the
SFSafariViewController is opened. This might be useful in cases when you need it to load resource-intensive webpages and want to provide better experience to the user.
To do this, there is class-level method
prewarmConnections which takes as its input an array of
URLs to "prewarm". You will get back a token so you can later cancel this operation. Maybe user opens a screen that lets them open the website, but they change their mind, so in the
viewDidDisappear you could invalidate this token using its
let urls = [URL(string: "https://apple.com")!] let token = SFSafariViewController.prewarmConnections(to: urls)
Running custom extension
The second new feature is the ability to run custom extension in the
SFSafariViewController. We can use the new configuration options to specify bundle identifier for the extension and image which will be used for the button the controller will display.
let config = SFSafariViewController.Configuration() config.activityButton = .init(templateImage: UIImage(systemName: "sun.max")!, extensionIdentifier: "com.bundle.extension") let safariVC = SFSafariViewController(url: URL(string: "https://apple.com")!, configuration: config)
Note that this has to be Share Extension according to the WWDC session. I cannot think of an use case but since Apple added this, I guess there are valid ones.
Let me know if you find this particularly useful - I am curious.
Uses: Xcode 13 & Swift 5.5