Add SwiftUI example app

Example/SwiftUI/ExampleSwiftUI/AppDelegate.swift

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+//
+//  AppDelegate.swift
+//  ExampleSwiftUI
+//
+//  Created by Frank Schmitt on 5/11/23.
+//
+
+import UIKit
+import ApptentiveKit
+
+class AppDelegate: NSObject, UIApplicationDelegate {
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
+
+        Apptentive.shared.register(with: .init(key: "<#Your Apptentive App Key#>", signature: "<#Your Apptentive App Signature#>"))
+
+        return true
+    }
+}

Example/SwiftUI/ExampleSwiftUI/Assets.xcassets/AccentColor.colorset/Contents.json

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+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Example/SwiftUI/ExampleSwiftUI/Assets.xcassets/AppIcon.appiconset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Example/SwiftUI/ExampleSwiftUI/Assets.xcassets/Placeholder.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "filename" : "P1040311.jpg",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Example/SwiftUI/ExampleSwiftUI/ExampleSwiftUIApp.swift

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+//
+//  ExampleSwiftUIApp.swift
+//  ExampleSwiftUI
+//
+//  Created by Frank Schmitt on 5/3/23.
+//
+
+import SwiftUI
+import ApptentiveKit
+
+@main
+struct ExampleSwiftUIApp: App {
+    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
+
+    @State private var photoManager = PhotoManager.shared
+
+    var body: some Scene {
+        WindowGroup {
+            GalleryView()
+                .environment(photoManager)
+                .tint(.red)
+        }
+    }
+
+    init() {
+        PhotoManager.shared.load()
+    }
+}

Example/SwiftUI/ExampleSwiftUI/GalleryView.swift

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+//
+//  ContentView.swift
+//  ExampleSwiftUI
+//
+//  Created by Frank Schmitt on 5/3/23.
+//
+
+import SwiftUI
+import ApptentiveKit
+
+struct GalleryView: View {
+    @Environment(PhotoManager.self) private var photoManager
+    @State private var selectedTabIndex = 0
+
+    var body: some View {
+        TabView(selection: $selectedTabIndex) {
+            NavigationStack() {
+                PhotoListView(photoList: photoManager.allItems)
+                    .navigationTitle("Photos")
+            }
+            .tabItem {
+                Label("Photos", systemImage: "photo")
+            }
+            .tag(1)
+
+            NavigationStack() {
+                PhotoListView(photoList: photoManager.favoriteItems)
+                    .navigationTitle("Favorites")
+            }
+            .tabItem {
+                Label("Favorites", systemImage: "heart")
+            }
+            .tag(2)
+        }.onChange(of: selectedTabIndex) { _, newValue in
+            if newValue == 2 {
+                Apptentive.shared.engage(event: "favorite_photos")
+            } else {
+                Apptentive.shared.engage(event: "all_photos")
+            }
+        }
+    }
+}
+
+#Preview {
+    let photoManager = {
+        let result = PhotoManager()
+
+        result.load()
+
+        return result
+    }()
+
+    GalleryView()
+        .environment(photoManager)
+}

Example/SwiftUI/ExampleSwiftUI/PhotoCard.swift

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+//
+//  PhotoCard.swift
+//  ExampleSwiftUI
+//
+//  Created by Frank Schmitt on 5/3/23.
+//
+
+import SwiftUI
+import ApptentiveKit
+
+struct PhotoCard: View {
+    @Binding var isFavorite: Bool
+    let image: UIImage
+
+    var body: some View {
+        ZStack(alignment: .bottomTrailing) {
+            Image(uiImage: self.image)
+                .resizable()
+                .aspectRatio(contentMode: .fill)
+                .containerRelativeFrame(
+                    .horizontal
+                ) { length, axis in
+                    if axis == .vertical {
+                        return length
+                    } else {
+                        return length / 1.1
+                    }
+                }
+                .clipShape(RoundedRectangle(cornerRadius: 20, style: .continuous))
+
+            Button(action: {
+                self.isFavorite.toggle()
+                Apptentive.shared.engage(event: "toggle_favorite")
+            }) {
+                if self.isFavorite {
+                    Image(systemName: "heart.fill")
+                } else {
+                    Image(systemName: "heart")
+                }
+            }
+            .padding(8)
+            .background(.thinMaterial, in: Circle())
+            .padding()
+        }
+        .aspectRatio(1, contentMode: .fit)
+    }
+}
+
+#Preview {
+    PhotoCard(isFavorite: .constant(false), image: UIImage(named: "Placeholder")!)
+}

Example/SwiftUI/ExampleSwiftUI/PhotoListView.swift

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+//
+//  PhotoListView.swift
+//  ExampleSwiftUI
+//
+//  Created by Frank Schmitt on 5/3/23.
+//
+
+import SwiftUI
+
+struct PhotoListView: View {
+    @Environment(PhotoManager.self) private var photoManager
+    var photoList: [PhotoManager.Photo]
+
+    var body: some View {
+        if photoList.isEmpty {
+            ContentUnavailableView("No Photos", systemImage: "photo.on.rectangle.angled")
+        } else {
+            ScrollView {
+                LazyVGrid(columns: [GridItem(.flexible())], spacing: 16) {
+                    ForEach(self.photoList) { photo in
+                        PhotoCard(
+                            isFavorite:
+                                Binding(
+                                    get: { photo.isFavorite },
+                                    set: { photoManager.setFavorite($0, for: photo.tag) }
+                                ),
+                            image: photo.image
+                        )
+
+                    }
+                }
+                .animation(.default, value: photoList)
+            }
+        }
+    }
+}
+
+#Preview("No Photos") {
+    PhotoListView(photoList: [])
+        .environment(PhotoManager())
+}
+
+#Preview("With Photos") { @MainActor in
+    let photoManager = PhotoManager()
+    photoManager.load()
+
+    return PhotoListView(photoList: photoManager.allItems)
+        .environment(photoManager)
+}
+

Example/SwiftUI/ExampleSwiftUI/PhotoManager.swift

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+//
+//  PhotoManager.swift
+//  Example
+//
+//  Created by Frank Schmitt on 6/24/21.
+//
+
+import UIKit
+import Observation
+
+@Observable
+@MainActor
+class PhotoManager {
+    struct Photo: Hashable, Identifiable {
+        var id: Int { tag }
+        let image: UIImage
+        let tag: Int
+        var isFavorite: Bool
+    }
+
+    @ObservationIgnored private let imageURLs: [URL]
+    @ObservationIgnored private var images = [UIImage]()
+
+    private static let userDefaultsKey = "FavoritePhotos"
+
+    static let shared = PhotoManager()
+
+    var allItems = [Photo]() {
+        didSet {
+            self.favoriteItems = self.allItems.filter { $0.isFavorite }
+            UserDefaults.standard.set(self.favoriteItems.map { $0.tag }, forKey: Self.userDefaultsKey)
+        }
+    }
+
+    var favoriteItems = [Photo]()
+
+    init() {
+        self.imageURLs = Bundle.main.urls(forResourcesWithExtension: "jpg", subdirectory: "Photos") ?? []
+    }
+
+    func load() {
+        self.images = self.imageURLs.compactMap { url in
+            UIImage(contentsOfFile: url.path)
+        }
+
+        let defaultFavorites = Set(UserDefaults.standard.array(forKey: Self.userDefaultsKey) as? [Int] ?? [])
+
+        self.allItems = self.images.enumerated().map { (index, image) in
+            return Photo(image: image, tag: index, isFavorite: defaultFavorites.contains(index))
+        }
+    }
+
+    func setFavorite(_ isFavorite: Bool, for tag: Int) {
+        self.allItems[tag].isFavorite = isFavorite
+    }
+}
+

Example/SwiftUI/ExampleSwiftUI/Preview Content/Preview Assets.xcassets/Contents.json

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+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Example/SwiftUI/LICENSE

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+MIT License
+
+Copyright (c) 2023 Apptentive, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Example/SwiftUI/README.md

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+# ExampleSwiftUI
+Example of Integrating ApptentiveKit into a SwiftUI App