Passing an array of TextInputs from child view to parent view. swiftui - swiftui

Question

I have a parent view of AttackParameters which is calling a child view (MissileView)... I am sending MissileView three things. 2 arrays, which give the Missile view enough to create a grid based on those two arrays and the grid is a grid of text inputs, like Soduko. Then I am passing in an array of names so that is has the same number of rows and cols as the grid.
ForEach(missileSelections, id:\.self) { missile in
if showGreeting{
Text(missile).padding()
MissileView(launchPointCount: launchPointsSelections, targetCount: targetSelections, names: [[String]](repeating: [String](repeating: "", count: targetSelections.count), count: launchPointsSelections.count)).padding(.horizontal, 20)
}
}
}
As you can see above I am calling the MissileView there.
GridStack(rows: launchPointCount.count, columns: targetCount.count) { row, col in
TextField("", text: $names[row][col]).border(Color.black, width: 0.5).background(Color.white).keyboardType(.decimalPad).onChange(of: names)
Above is the missileView class. It has a 2d array of text inputs, but I would like to after the user puts text in the grid of text inputs to return that array back to the parent view. How can I do this?

Answer 1

to do that you need something like this:
struct MissileView: View {
#Binding var launchPointCount: [String]
#Binding var targetCount: [String]
#Binding var names: [[String]]
...
}
with
struct AttackParametersView: View {
....
#State var names = [[String]]()
...
MissileView(launchPointCount: $launchPointsSelections,
targetCount: $targetSelections,
names: $names))
}
and somewhere before calling "MissileView(....)" do:
names = [[String]](repeating: [String](repeating: "",
count: targetSelections.count),
count: launchPointsSelections.count)
or put this in MissileView, something like:
.onAppear(perform: {
names = [[String]](repeating: [String](repeating: "", count: targetCount.count), count: launchPointCount.count)
})
Edit:
I cannot do all your code for you, however your setup is complicated enough
that you should look into creating a dedicated model
that holds the state of your system, and use that for the inputs you want for each "grid".
An ObservableObject model that you pass around, for example:
class AttackParameters: ObservableObject {
#Published var grids ....
#Published var names ....
...
}
then use it in AttackParametersView, and similarly in MissileView:
#ObservedObject var attackParameters = AttackParameters()
So when your attackParameters model changes, all views will know about it and adjust accordingly.