Alternate-icon-ContentView.swift

import SwiftUI

struct ContentView: View {
    
    @EnvironmentObject var iconSettings : IconNames
    
    var body: some View {
        NavigationView {
            Form {
                Section{
                    
                    Picker(selection: $iconSettings.currentIndex, label: Text("Icons"))
                    {
                        ForEach(0..<iconSettings.iconNames.count) {
                            Text(self.iconSettings.iconNames[$0] ?? "Default")
                            
                        }
                    }.onReceive([self.iconSettings.currentIndex].publisher.first()) { (value) in
                        
                        let index = self.iconSettings.iconNames.firstIndex(of: UIApplication.shared.alternateIconName) ?? 0
                        
                        if index != value{
                            UIApplication.shared.setAlternateIconName(self.iconSettings.iconNames[value]){ error in
                                if let error = error {
                                    print(error.localizedDescription)
                                } else {
                                    print("Success!")
                                }
                            }
                        }
                        
                    }
                }
                
            } .navigationBarTitle("AlternateIcons", displayMode: .inline)
        }
    }
}