Extendable
A set of utilities for more pleasant work with ExtensionKit
Global Connection
Setting up an ExtensionKit extension can be confusing, and requires a fair amount of boilerplate. ConnectableExtension makes it easier to manage the global host connection.
@main
final class ExampleExtension: ConnectableExtension {
init() {
}
func acceptConnection(_ connection: NSXPCConnection) throws {
// configure your global connection and possibly
// store references to host interface objects
}
}Scenes
Dealing with View-based extensions is even more complex. And, there isn't a clear way to get access to the host connection in your views. Extendable comes with a few components that make it easier to build scenes and manage view connections.
ConnectingAppExtensionScene
This is a AppExtensionScene that makes it easier to get access to the scene's connection within your View.
ConnectingAppExtensionScene(sceneID: "one") { (sceneId, connection) in
try ConnectionView(sceneId: sceneId, connection: connection)
}AppExtensionSceneGroup
I expect this type won't be needed once Ventura ships. And, maybe it's just me, but I've been unable to figure out how to use AppExtensionSceneBuilder without a wrapper type. So here it is.
Example View
You can use ConnectingAppExtensionScene and AppExtensionSceneGroup independently, or as part of a more standard extension structure. But, if you want, you can also make use of the ConnectableSceneExtension protocol to really streamline your view class. Here's a full example:
@main
final class ViewExtension: ConnectableSceneExtension {
init() {
}
func acceptConnection(_ connection: NSXPCConnection) throws {
// handle global connection
}
var scene: some AppExtensionScene {
AppExtensionSceneGroup {
ConnectingAppExtensionScene(sceneID: "one") { (sceneId, connection) in
try ConnectionView(sceneId: sceneId, connection: connection)
}
ConnectingAppExtensionScene(sceneID: "two") { (sceneId, connection) in
try ConnectionView(sceneId: sceneId, connection: connection)
}
}
}
}
struct ConnectionView: View {
let sceneName: String
let connection: NSXPCConnection?
init(sceneId: String, connection: NSXPCConnection?) throws {
self.sceneName = sceneId
self.connection = connection
}
var value: String {
return String(describing: connection)
}
var body: some View {
VStack {
Rectangle().frame(width: nil, height: 4).foregroundColor(.green)
Spacer()
Text("\(sceneName): \(value)")
Spacer()
Rectangle().frame(width: nil, height: 4).foregroundColor(.red)
}
}
}ExtendableHost
Extendable also includes a second library called ExtendableHost.
You can its AppExtensionBrowserView and ExtensionHostingView to integrate the ExtensionKit view system with SwiftUI in your host application.
// very simple init extension to help with actor-isolation compatibility
let process = try await AppExtensionProcess(appExtensionIdentity: identity)Suggestions or Feedback
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