How to dismiss a Sheet and open a NavigationLink in a new View? - swiftui

Question

I have a View with a search button in the toolbar. The search button presents a sheet to the user and when he clicks on a result I would like the sheet to be dismissed and a detailView to be opened rather than navigating to the detailView from inside the sheet. The dismiss part is easy, but how do I open the detailView in the NavigationStack relative to the original View that presented the Sheet?
I'm also getting an error on the navigationStack initialization.
HomeScreen:
struct CatCategoriesView: View {
#StateObject private var vm = CatCategoriesViewModel(service: Webservice())
#State var showingSearchView = false
#State var path: [CatDetailView] = []
var body: some View {
NavigationStack(path: $path) { <<-- Error here "No exact matches in call to initializer "
ZStack {
Theme.backgroundColor
.ignoresSafeArea()
ScrollView {
switch vm.state {
case .success(let cats):
LazyVStack {
ForEach(cats, id: \.id) { cat in
NavigationLink {
CatDetailView(cat: cat)
} label: {
CatCategoryCardView(cat: cat)
.padding()
}
}
}
case .loading:
ProgressView()
default:
EmptyView()
}
}
}
.navigationTitle("CatPedia")
.toolbar {
Button {
showingSearchView = true
} label: {
Label("Search", systemImage: "magnifyingglass")
}
}
}
.task {
await vm.getCatCategories()
}
.alert("Error", isPresented: $vm.hasError, presenting: vm.state) { detail in
Button("Retry") {
Task {
await vm.getCatCategories()
}
}
} message: { detail in
if case let .failed(error) = detail {
Text(error.localizedDescription)
}
}
.sheet(isPresented: $showingSearchView) {
SearchView(vm: vm, path: $path)
}
}
}
SearchView:
struct SearchView: View {
let vm: CatCategoriesViewModel
#Environment(\.dismiss) private var dismiss
#Binding var path: [CatDetailView]
#State private var searchText = ""
var body: some View {
NavigationStack {
List {
ForEach(vm.filteredCats, id: \.id) { cat in
Button(cat.name) {
dismiss()
path.append(CatDetailView(cat: cat))
}
}
}
.navigationTitle("Search")
.searchable(text: $searchText, prompt: "Find a cat..")
.onChange(of: searchText, perform: vm.search)
}
}
}

Answer 1

It can be a little tricky, but I'd suggest using a combination of Apple's documentation on "Control a presentation link programmatically" and shared state. To achieve the shared state, I passed a shared view model into the sheet.
I have simplified your example to get it working in a more generic way. Hope this will work for you!
ExampleParentView.swift
import SwiftUI
struct ExampleParentView: View {
#StateObject var viewModel = ExampleViewModel()
var body: some View {
NavigationStack(path: $viewModel.targetDestination) {
List {
NavigationLink("Destination A", value: TargetDestination.DestinationA)
NavigationLink("Destination B", value: TargetDestination.DestinationB)
}
.navigationDestination(for: TargetDestination.self) { target in
switch target {
case .DestinationA:
DestinationA()
case .DestinationB:
DestinationB()
}
}
.navigationTitle("Destinations")
Button(action: {
viewModel.showModal = true
}) {
Text("Click to open sheet")
}
}
.sheet(isPresented: $viewModel.showModal, content: {
ExampleSheetView(viewModel: viewModel)
.interactiveDismissDisabled()
})
}
}
ExampleViewModel.swift
import Foundation
import SwiftUI
class ExampleViewModel: ObservableObject {
#Published var showModal = false
#Published var targetDestination: [TargetDestination] = []
}
enum TargetDestination {
case DestinationA
case DestinationB
}
ExampleSheetView.swift
import SwiftUI
struct ExampleSheetView: View {
let viewModel: ExampleViewModel
var body: some View {
VStack {
Text("I am the sheet")
Button(action: {
viewModel.showModal = false
viewModel.targetDestination.append(.DestinationA)
}) {
Text("Close the sheet and navigate to `A`")
}
Button(action: {
viewModel.showModal = false
viewModel.targetDestination.append(.DestinationB)
}) {
Text("Close the sheet and navigate to `B`")
}
}
}
}
DestinationA.swift
import SwiftUI
struct DestinationA: View {
var body: some View {
Text("Destination A")
}
}
DestinationB.swift
import SwiftUI
struct DestinationB: View {
var body: some View {
Text("Destination B")
}
}