Add App Icon changer

AltStore/Views/Settings/AppIconsView.swift

@@ -0,0 +1,107 @@
+//
+//  AppIconsView.swift
+//  SideStore
+//
+//  Created by naturecodevoid on 2/14/23.
+//  Copyright © 2023 SideStore. All rights reserved.
+//
+
+import SwiftUI
+import SFSafeSymbols
+
+struct Icon: Identifiable {
+    var id: String { assetName }
+    var displayName: String
+    let assetName: String
+}
+
+struct SpecialIcon {
+    let assetName: String
+    let suffix: String?
+    let forceIndex: Int?
+}
+
+struct AppIconsView: View {
+    private let specialIcons = [
+        SpecialIcon(assetName: "Neon", suffix: "(Stable)", forceIndex: 0),
+        SpecialIcon(assetName: "Starburst", suffix: "(Beta)", forceIndex: 1),
+        SpecialIcon(assetName: "Steel", suffix: "(Nightly)", forceIndex: 2),
+    ]
+    private var icons: [Icon] = []
+    
+    @State private var selectedIcon: String? = "" // this is just so the list row background changes when selecting a value, I couldn't get it to keep the selected icon name (for some reason it was always "", even when I set it to the selected icon asset name)
+    @State private var selectedIconAssetName: String // FIXME: use selectedIcon instead
+    
+    init() {
+        let bundleIcons = Bundle.main.object(forInfoDictionaryKey: "CFBundleIcons") as! [String: Any]
+        
+        let primaryIcon = bundleIcons["CFBundlePrimaryIcon"] as! [String: Any]
+        let primaryIconName = primaryIcon["CFBundleIconName"] as! String
+        icons.append(Icon(displayName: primaryIconName, assetName: primaryIconName)) // ensure primary icon is first
+        
+        for (key, _) in bundleIcons["CFBundleAlternateIcons"] as! [String: Any] {
+            icons.append(Icon(displayName: key, assetName: key))
+        }
+        
+        // sort alphabetically
+        icons.sort { $0.assetName < $1.assetName }
+        
+        for specialIcon in specialIcons {
+            guard let icon = icons.enumerated().first(where: { $0.element.assetName == specialIcon.assetName }) else { continue }
+            
+            if let suffix = specialIcon.suffix {
+                icons[icon.offset].displayName += " " + suffix
+            }
+            
+            if let forceIndex = specialIcon.forceIndex {
+                let e = icons.remove(at: icon.offset)
+                icons.insert(e, at: forceIndex)
+            }
+        }
+        
+        if let alternateIconName = UIApplication.shared.alternateIconName {
+            selectedIconAssetName = icons.first { $0.assetName == alternateIconName }?.assetName ?? icons[0].assetName
+        } else {
+            selectedIconAssetName = icons[0].assetName
+        }
+    }
+    
+    var body: some View {
+        List(icons, selection: $selectedIcon) { icon in
+            // FIXME: Button gives errors for some reason
+            SwiftUI.Button(action: {
+                selectedIconAssetName = icon.assetName
+                // Pass nil for original icon
+                UIApplication.shared.setAlternateIconName(icon.assetName == icons[0].assetName ? nil : icon.assetName, completionHandler: { error in
+                    if let error = error {
+                        print("error when setting alternate app icon to \(icon.assetName): \(error.localizedDescription)")
+                    } else {
+                        print("successfully changed app icon to \(icon.assetName)")
+                    }
+                })
+            }) {
+                HStack(spacing: 20) {
+                    // if we don't have an additional image asset for each icon, it will have low resolution
+                    Image(uiImage: UIImage(named: icon.assetName + "-image") ?? UIImage())
+                        .resizable()
+                        .renderingMode(.original)
+                        .cornerRadius(12.6) // https://stackoverflow.com/a/10239376
+                        .frame(width: 72, height: 72)
+                    Text(icon.displayName)
+                    Spacer()
+                    if selectedIconAssetName == icon.assetName {
+                        Image(systemSymbol: .checkmark)
+                            .foregroundColor(Color.blue)
+                    }
+                }
+            }.foregroundColor(Color.white)
+        }
+        .navigationTitle(L10n.AppIconsView.title)
+    }
+}
+
+struct AppIconsView_Previews: PreviewProvider {
+    static var previews: some View {
+        AppIconsView()
+    }
+}

AltStore/Views/Settings/SettingsView.swift

@@ -33,7 +33,7 @@ struct SettingsView: View {
 
     @State var externalURLToShow: URL?
     
-    let appVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? ""
+    let appVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "Unknown"
     
     var body: some View {
         List {
@@ -150,6 +150,10 @@ struct SettingsView: View {
             }
             
             Section {
+                NavigationLink(L10n.AppIconsView.title) {
+                    AppIconsView()
+                }
+                
                 NavigationLink("Show Error Log") {
                     ErrorLogView()
                 }