SwiftUI passing a saved value to parent view - swift

Question

I am fairly new to SwiftUI I am trying to figure out the best way to pass data from a child view to parent?
Thanks for the help I come from a Javascript (React) background so this is a little different for me
The way my child view works is the user clicks on an image to select that image.
I have #State binding that saves the imgUrl which is a String referring to name in Assets.
I am just not sure about the best way to pass that value to the parent component.
Here is the child view (imageSelector)
struct ImageSelector: View {
#State private var windowImgs = ["1", "2", "3","4","5","6","7","8","9","10","11","12","13", "14","15","16","17","18"]
#State private var imgPicked = ""
var body: some View{
ScrollView(Axis.Set.horizontal, showsIndicators: true){
HStack{
ForEach(0..<18){num in
Button(action:{
self.imgPicked = self.windowImgs[num]
print(self.imgPicked)
}){
Image("\(self.windowImgs[num])")
.renderingMode(.original)
.resizable()
.cornerRadius(4)
.frame(width: 100, height: 100)
}
}
}
}
}
}
Here is the parent view (AddCounterForm)
struct AddCounterForm: View {
#Environment(\.presentationMode) var presentationMode
#State private var pickedImg: String = "defaultImg"
#State private var price: String = "0.0"
#State private var qty: String = "0"
var body: some View {
VStack (spacing: 40){
HStack {
Button("Cancel"){
self.presentationMode.wrappedValue.dismiss()
}
.foregroundColor(.red)
Spacer()
Button("Save"){
}
}
HStack {
VStack (spacing: 20){
TextField("Window type", text: /*#START_MENU_TOKEN#*//*#PLACEHOLDER=Value#*/.constant("")/*#END_MENU_TOKEN#*/)
TextField("Window location", text: /*#START_MENU_TOKEN#*//*#PLACEHOLDER=Value#*/.constant("")/*#END_MENU_TOKEN#*/)
}
.textFieldStyle(RoundedBorderTextFieldStyle())
Image(pickedImg)
.resizable()
.cornerRadius(4)
.frame(width: 90, height: 90)
.padding(.leading)
}
HStack {
Text("Price")
TextField("", text:$price)
.frame(width: 70)
.textFieldStyle(RoundedBorderTextFieldStyle())
.keyboardType(.numberPad)
Spacer()
Text("Qty")
TextField("", text:$qty)
.frame(width: 70)
.textFieldStyle(RoundedBorderTextFieldStyle())
.keyboardType(.numberPad)
}
VStack {
Text("Select an image")
.foregroundColor(.blue)
ImageSelector()
.padding(.bottom)
Button("Use your own image"){
//method
}
.frame(width: 180, height: 40)
.background(Color.blue)
.clipShape(Capsule())
.foregroundColor(.white)
.padding(.top)
}
}
.padding()
}
}
Solution for preview thanks for the help from #Asperi & #neverwinterMoon
struct ImageSelector_Previews: PreviewProvider {
static var previews: some View {
PreviewWrapper()
}
}
struct PreviewWrapper: View {
#State(initialValue: "") var imgPicked: String
var body: some View {
ImageSelector(imgPicked: $imgPicked)
}
}

Answer 1

In this case Binding is most appropriate
struct ImageSelector: View {
#Binding var imgPicked: String
and use
ImageSelector(imgPicked: $pickedImg)
.padding(.bottom)