I have an app with 4 tabs. Each tab has its own view model. The user flow is: Open app Click on tab 4 Select the TextField My expectation was that on tab 4 selection the onAppear's would execute for that tab. Then on textfield selection nothing would happen.. instead all tab views are rendering. Why and how do I make those other tabs not render on selection? Her is the user flow results and code: // ON LOAD 1 simple view appear 1 get people tab 1 appear 1 get people // SELECT TAB 4 4 simple view appear 4 get people tab 4 appear 4 get people // FOCUS TAB 4 TEXTFIELD -> ALL TABS RENDER ! Why are these tabs rendering? 2 simple view appear 2 get people tab 2 appear 2 get people 3 simple view appear 3 get people tab 3 appear 3 get people tab 1 appear 1 get people 1 simple view appear 1 get people Content View import SwiftUI import CoreData struct ContentView: View {   @Environment(\.managedObjectContext) private var viewContext       @ObservedObject var viewModel1: ViewModel = ViewModel()   @ObservedObject var viewModel2: ViewModel = ViewModel()   @ObservedObject var viewModel3: ViewModel = ViewModel()   @ObservedObject var viewModel4: ViewModel = ViewModel()       var body: some View {     TabView {       SimpleView(viewModel: self.viewModel1, people: viewModel1.people, num: 1)       .tabItem {         Text("1")       }.onAppear{         print("tab 1 appear")         viewModel1.getPeople(num: 1)       }       SimpleView(viewModel: self.viewModel2, people: viewModel2.people, num: 2)       .tabItem {         Text("2")       }.onAppear{         print("tab 2 appear")         viewModel2.getPeople(num: 2)       }       SimpleView(viewModel: self.viewModel3, people: viewModel3.people, num: 3)       .tabItem {         Text("3")       }.onAppear{         print("tab 3 appear")         viewModel3.getPeople(num: 3)       }       SimpleView(viewModel: self.viewModel4, people: viewModel4.people, num: 4)       .tabItem {         Text("4")       }.onAppear{         print("tab 4 appear")         viewModel4.getPeople(num: 4)       }     }   } } Model import Foundation struct Person: Identifiable, Equatable {   let id = UUID()   let name: String } class ViewModel: ObservableObject {   @Published var people: [Person] = []       func getPeople(num: Int) {     print("\(num) get people")     DispatchQueue.main.async {       let person = Person(name: "Hank \(num)")       self.people.append(person)     }   }   } View Model import SwiftUI struct SimpleView: View {       @State var text: String = ""   @State var viewModel: ViewModel   var people: [Person]   var num: Int       var body: some View {     VStack {       TextField("Enter text", text: self.$text)               ForEach(viewModel.people) { person in         Text(person.name)       }     }.onAppear {       print("\(num) simple view appear")       viewModel.getPeople(num: num)     }   } }