gistfile1.txt

import SwiftUI
import CoreData

struct RandomView: View {
    var body: some View {
        Text("Hi")
            .onAppear {
                DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(1)) {
                    doSomething()
                }
            }
            .onDisappear(perform: {
                print("disappear")
            })
    }

    func doSomething() {
        print("i wanna be printed one time")
    }
}

struct ContentView: View {

    var body: some View {
        TabView() {
            RandomView()
            Text("Other")
        }.tabViewStyle(PageTabViewStyle())
    }
}