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SingleSelectableView.swift
enum BoxType: String {
case unknown
case red
case green
case blue
}
final class SingleSelectableBoxViewModel: ObservableObject {
@Published var selectedBox: BoxType = .unknown
var cancels: [AnyCancellable] = []
init() {
let selected = $selectedBox.sink { (box) in
print("selected box is \(box.rawValue)")
}
cancels.append(selected)
}
}
struct ParentView: View {
@ObservedObject var viewModel = SingleSelectableBoxViewModel()
var body: some View {
VStack {
SingleSelectableBoxView(selectedBox: $viewModel.selectedBox)
Text("Selected box is \(viewModel.selectedBox.rawValue)")
}
}
}
struct ParentView_Previews: PreviewProvider {
static var previews: some View {
ParentView()
}
}
struct SingleSelectableBoxView: View {
@Binding var selectedBox: BoxType
var body: some View {
ScrollView {
BoxView(selectedBox: $selectedBox, color: .red, boxType: .red)
BoxView(selectedBox: $selectedBox, color: .green, boxType: .green)
BoxView(selectedBox: $selectedBox, color: .blue, boxType: .blue)
}
}
}
struct SingleSelectableBoxView_Previews: PreviewProvider {
static var previews: some View {
SingleSelectableBoxView(selectedBox: .constant(.red))
}
}
struct BoxView: View {
@Binding var selectedBox: BoxType
let color: Color
let boxType: BoxType
var body: some View {
Rectangle()
.foregroundColor(color)
.frame(width: 100, height: 100)
.cornerRadius(10)
.onTapGesture {
self.selectedBox = self.boxType
}
.padding()
.border(Color.black, width: selectedBox == boxType ? 4 : 0)
}
}
@SatoTakeshiX

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