1

So after much Googling and searching Swift forums, I'm coming up dry here.

What is the recommended approach to using class-bound delegates that have no SwiftUI counterpart (yet)?

Case in point: UIGuidedAccessRestrictionDelegate, where I may have typically added this as a conformance in an extension on AppDelegate.

@UIApplicationMain
class AppDelegate { ... }

extension AppDelegate: UIGuidedAccessRestrictionDelegate { ... }

However, SwiftUI apps are structs.

@main
struct MyApp: App { ... }

extension MyApp: UIGuidedAccessRestrictionDelegate { ... }
// error: Non-class type 'MyApp' cannot conform to class protocol 'NSObjectProtocol'

Apple's documentation mentions that this protocol must be adopted by the AppDelegate class. So this seems like a no-go for SwiftUI?

Are fringe feature-sets like Guided Access parameters being added to SwiftUI at some point in future?

2

Hi! These forums are about the Swift language, so questions about the SwiftUI private apple framework are kinda offtopic. In the future, try asking at SwiftUI | Apple Developer Forums

As for how to use UIApplicationDelegate in SwiftUI app, there is UIApplicationDelegateAdaptor property wrapper you can use

@main
struct MyApp: App { 
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
    ...
}
class AppDelegate: NSObject, UIApplicationDelegate, UIGuidedAccessRestrictionDelegate {
    ...
}
1 Like
3

Brilliant, thank you.

I was headed to the Apple dev forums initially but came here in a brainfart thinking this would be a more appropriate place. This thread can be deleted if desired.

4

IMO, it is swiftier to move the type of the delegate to the back:

@UIApplicationDelegateAdaptor var appDelegate: AppDelegate

not that it matters much.

1 Like
5

Yeah :sweat_smile:
I just copied a snipped from www.hackingwithswift.com without much thought