LiveQuery SwiftUI example in playgrounds

ParseSwift.playground/Pages/11 - LiveQuery.xcplaygroundpage/Contents.swift

@@ -3,6 +3,7 @@
 import PlaygroundSupport
 import Foundation
 import ParseSwift
+import SwiftUI
 PlaygroundPage.current.needsIndefiniteExecution = true
 
 initializeParse()
@@ -32,9 +33,61 @@ struct GameScore: ParseObject {
 //: Create a query just as you normally would.
 var query = GameScore.query("score" > 9)
 
+//: To use subscriptions inside of SwiftUI
+struct ContentView: View {
+
+    //: A LiveQuery subscription can be used as a view model in SwiftUI
+    @ObservedObject var subscription = query.subscribe!
+
+    var body: some View {
+        VStack {
+
+            if subscription.subscribed != nil {
+                Text("Subscribed to query!")
+            } else if subscription.unsubscribed != nil {
+                Text("Unsubscribed from query!")
+            } else if let event = subscription.event {
+
+                //: This is how you register to receive notificaitons of events related to your LiveQuery.
+                switch event.event {
+
+                case .entered(let object):
+                    Text("Entered with score: \(object.score)")
+                case .left(let object):
+                    Text("Left with score: \(object.score)")
+                case .created(let object):
+                    Text("Created with score: \(object.score)")
+                case .updated(let object):
+                    Text("Updated with score: \(object.score)")
+                case .deleted(let object):
+                    Text("Deleted with score: \(object.score)")
+                }
+            } else {
+                Text("Not subscribed to a query")
+            }
+
+            Spacer()
+
+            Text("Update GameScore in Parse Dashboard to see changes here")
+
+            Button(action: {
+                try? query.unsubscribe()
+            }, label: {
+                Text("Unsubscribe")
+                    .font(.headline)
+                    .background(Color.red)
+                    .foregroundColor(.white)
+                    .padding()
+                    .cornerRadius(20.0)
+                    .frame(width: 300, height: 50)
+            })
+        }
+    }
+}
+
+PlaygroundPage.current.setLiveView(ContentView())
+
 //: This is how you subscribe to your created query using callbacks.
-//: Note that if you want to use subscriptions with SwiftUI, you should
-//: use `let subscription = query.subscribe` instead.
 let subscription = query.subscribeCallback!
 
 //: This is how you receive notifications about the success

ParseSwift.playground/contents.xcplayground

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<playground version='6.0' target-platform='macos' display-mode='raw' buildActiveScheme='true' timelineScrubberEnabled='true' last-migration='1130'>
+<playground version='6.0' target-platform='ios' display-mode='raw' buildActiveScheme='true' timelineScrubberEnabled='true' last-migration='1130'>
     <pages>
         <page name='1 - Your first Object'/>
         <page name='2 - Finding Objects'/>