Why published Array does not change after I change him in SwiftUI? - ios

Question

So, this is just a sample code from my project. After I call SecondView, I want to change names in the array to "LoL", and display them. Why init() does not change my array? Since it does not display new names
struct Person: Identifiable {
let id = UUID()
var name: String
var index: Int
}
class User: ObservableObject {
#Published var array = [Person(name: "Nick", index: 0),
Person(name: "John", index: 1)
]
}
struct ContentView: View {
#ObservedObject var user = User()
var body: some View {
VStack {
ForEach (user.array) { row in
SecondView(name: row.name, index: row.index)
}
}
}
}
struct SecondView: View {
#ObservedObject var user = User()
var name = ""
var index = 0
init() {
user.array[index].name = "LoL"
}
init(name: String, index: Int) {
self.name = name
self.index = index
}
var body: some View {
VStack {
Text(name)
}
}
}

Answer 1

It is because you are not calling init() method in SecondView but you are calling init(name:, index:). Notice how you use SecondView initializer inside your FirstView's iteration (ie. ForEach) loop.
Also your second view displays the name that is passed along the initializer init(name:index:), not the one from your user array. So, if you want to change name to something, do that before this init(name:index:) is called, and pass the name from user array.
You can do it inside your first view.
struct ContentView: View {
#ObservedObject var user = User()
init() {
user.array[0].name = "LoL"
}
var body: some View {
VStack {
ForEach (user.array) { row in
SecondView(name: row.name, index: row.index)
}
}
}
}
Notice that it will now change the first name to Lol because we change it inside ContentView's initializer which then uses the same modified name.