SwiftUI List disable cell press - swift

I am using xCode 11 beta 7 with SwiftUI.
I have a simple list which each list element has several buttons. Currently when the user presses the cell(not the buttons) it is highlighting the back of the list cell(probably not the correct terminology for SwiftUI).
How do i disable this behaviour? I could not locate an obvious api to disable it.
List {
HStack {
Group {
Button(action: {}) {
Text("Read").padding(5)
}.onTapGesture {
print("1")
}
.padding()
.background(Color.blue)
.cornerRadius(5)
}
Group {
Button(action: {}) {
Text("Notify").padding(5)
}.onTapGesture {
print("2")
}
.padding()
.background(Color.purple)
.cornerRadius(5)
}
Group {
Button(action: {}) {
Text("Write").padding(5)
}.onTapGesture {
print("3")
}
.padding()
.background(Color.yellow)
.cornerRadius(5)
}
}
}

Same answer as in How to remove highlight on tap of List with SwiftUI?
I know I'm a bit late, but it's for those of you who are searching (like me 😇)
What I found
I guess you should take a look at the short article How to disable the overlay color for images inside Button and NavigationLink from #TwoStraws
Just add the .buttonStyle(PlainButtonStyle()) modifier to your item in the List and you'll have what you wanted. It also makes the Buttons work again in the List, which is another problem I encountered.
A working example for Swift 5.1 :
import Combine
import SwiftUI
struct YourItem: Identifiable {
let id = UUID()
let text: String
}
class YourDataSource: ObservableObject {
let willChange = PassthroughSubject<Void, Never>()
var items = [YourItem]()
init() {
items = [
YourItem(text: "Some text"),
YourItem(text: "Some other text")
]
}
}
struct YourItemView: View {
var item: YourItem
var body: some View {
VStack(alignment: .leading) {
Text(item.text)
HStack {
Button(action: {
print("Like")
}) {
Image(systemName: "heart.fill")
}
Button(action: {
print("Star")
}) {
Image(systemName: "star.fill")
}
}
}
.buttonStyle(PlainButtonStyle())
}
}
struct YourListView: View {
#ObservedObject var dataSource = YourDataSource()
var body: some View {
List(dataSource.items) { item in
YourItemView(item: item)
}
.navigationBarTitle("List example", displayMode: .inline)
.edgesIgnoringSafeArea(.bottom)
}
}
#if DEBUG
struct YourListView_Previews: PreviewProvider {
static var previews: some View {
YourListView()
}
}
#endif
As said in the article, it also works with NavigationLinks. I hope it helped some of you 🤞🏻

This is my simplest solution that is working for me (lo and behold, I'm building my first app in Swift and SwiftUI as well as this being my first post on SO):
Wherever you have buttons, add .buttonStyle(BorderlessButtonStyle())
Button(action:{}){
Text("Hello")
}.buttonStyle(BorderlessButtonStyle())
Then on your list, add .onTapGesture {return}
List{
Text("Hello")
}.onTapGesture {return}

Instead of using a button try it with a gesture instead
Group {
Text("Notify").padding(5).gesture(TapGesture().onEnded() {
print("action2")
})
.padding()
.background(Color.purple)
.cornerRadius(5)
}

Related

Dismissing a SwiftUI sheet with a lot of navigation views

I have a button that opens up a Profile & Settings view in a sheet that has additional navigation views in it.
I am aware how to dismiss the sheet, however this method seems to not work with additional navigation views, as when I'm deeper into the navigation and I tap "Done" to dismiss the sheet, it only returns me back to the previous navigation view until I go back to the main Profile & Settings view.
The view with the button:
import SwiftUI
struct TodayView: View {
#State private var showSheet = false
var body: some View {
NavigationView {
ScrollView {
VStack(alignment: .leading) {
TodayTabDateComponent()
.padding(.top, -10)
ForEach(0 ..< 32) { item in
VStack(alignment: .leading) {
Text("Title")
Text("Description")
}
.padding(.vertical)
}
}
.frame(maxWidth: .infinity, alignment: .leading)
.padding(.horizontal)
}
.navigationTitle("Today")
.toolbar {
ToolbarItem(placement: .navigationBarLeading) {
Button(action: {
showSheet = true
}, label: {
Image(systemName: "person.circle.fill")
.foregroundColor(.primary)
})
.sheet(isPresented: $showSheet) {
ProfileAndSettingsView()
}
}
}
}
}
}
struct TodayView_Previews: PreviewProvider {
static var previews: some View {
TodayView()
}
}
The Profile & Settings view:
import SwiftUI
struct ProfileAndSettingsView: View {
#Environment(\.presentationMode) var presentationMode
var body: some View {
NavigationView {
VStack {
List {
Section {
NavigationLink {
UserProfileView()
} label: {
HStack(alignment: .center) {
Image("avatar")
.resizable()
.aspectRatio(contentMode: .fit)
.clipShape(Circle())
.frame(width: 60, height: 60)
VStack(alignment: .leading) {
Text("Name Surname")
.font(.title2)
.fontWeight(.bold)
Text("Profile Settings, Feed Preferences\n& Linked Accounts")
.font(.caption)
}
}
}
.padding(.vertical, 6)
} }
.listStyle(.insetGrouped)
.navigationTitle("Profile & Settings")
.navigationBarTitleDisplayMode(.inline)
.toolbar {
ToolbarItem(placement: .navigationBarTrailing) {
Button {
presentationMode.wrappedValue.dismiss()
} label: {
Text("Done")
}
}
}
}
}
}
}
struct ProfileAndSettingsView_Previews: PreviewProvider {
static var previews: some View {
ProfileAndSettingsView()
}
}
I have looked into the issue but couldn't find any working solutions.
Is your issue here that you're applying the .sheet to the Button inside the Toolbar? I think you need to apply it to the NavigationView itself?
import SwiftUI
struct TodayView: View {
#State private var showSheet = false
var body: some View {
NavigationView {
....
}
.navigationTitle("Today")
.toolbar {
ToolbarItem(placement: .navigationBarLeading) {
Button(action: {
showSheet = true
}, label: {
Image(systemName: "person.circle.fill")
.foregroundColor(.primary)
})
}
}
.sheet(isPresented: $showSheet) {
ProfileAndSettingsView()
}
}
}
}
If you're targeting iOS15 or higher don't use presentationMode use #Environment(\.isPresented) private var isPresented instead this will perform the action that you want.
presentationMode was deprecated and replaced by isPresented and dismiss
I believe that presentationMode performs a similar action as dismiss does which according to Apple Docs (on the dismiss)
If you do this, the sheet fails to dismiss because the action applies to the environment where you declared it, which is that of the detail view, rather than the sheet. In fact, if you’ve presented the detail view in a NavigationView, the dismissal pops the detail view the navigation stack.
The dismiss action has no effect on a view that isn’t currently presented. If you need to query whether SwiftUI is currently presenting a view, read the isPresented environment value.
If you're targeting a lower iOS version you can create your own key like so
struct SheetOpen: EnvironmentKey {
static var defaultValue: Binding<Bool> = .constant(false)
}
extension EnvironmentValues {
var sheetOpen: Binding<Bool> {
get { self[SheetOpen.self] }
set { self[SheetOpen.self] = newValue }
}
}
Where you have your sheet defined you do this
.sheet(isPresented: $showSheet) {
ProfileAndSettingsView()
.environment(\.sheetOpen, $showSheet)
}
Then you can use it like any other environment variable
#Environment(\.sheetOpen) var sheetOpen
To dismiss it you simply do this sheetOpen.wrappedValue.toggle()

After using the keyboard and going directly to the details, only half of the screen is displayed when you return

By using NavigationLink directly after activating the keyboard and returning to the page, the position of the keyboard appears with a white background and the space is compressed.
Here my own speculation may be that although the keyboard has been closed, but it seems that the page does not know, if you re-click the search to activate the keyboard, and then hit enter, the page will return to normal. It seems that Navigationlink skipped the normal keyboard closing step.
But now I'm not sure how to verify my suspicions and how to solve the problem. Here is part of my code, please can someone help me, thank you very much.
import SwiftUI
struct HomePageView: View {
#Environment(\.presentationMode) var presentationMode
#StateObject var viewModel: HomePageViewModel
var body: some View {
ZStack(alignment: .bottomTrailing) {
VStack{
SearchBar(draft: $viewModel.searchDraft, barType: .item)
ScrollView(showsIndicators: false) {
itemListComponent
}
}
.padding(.horizontal, 16)
addItemButton
}
.onTapGesture {
self.endTextEditing()
}
.sheet(isPresented: $viewModel.itemCreateViewIsShow) {
NavigationView {
ItemEditorView(ItemEditorViewModel(context))
}
}
.background(Color("background"))
.navigationTitle("appName".localized())
.navigationViewStyle(.stack)
}
#FetchRequest(fetchRequest: Item.fetchAllItems()) private var items: FetchedResults<Item>
#ViewBuilder
private var itemListComponent: some View {
HStack (alignment: .center, spacing: 0) {
Text("item.sort.storage".localized())
Spacer(minLength: 0)
}
.frame(height: 52)
LazyVStack {
ForEach(items) { item in
NavigationLink(
destination:ItemDetailView(item: item, isShowing: $viewModel.isItemDetailViewPresented)
) {
ItemCellView(item: item)
}
.isDetailLink(false)
}
}
}
private var addItemButton: some View {
Button {
viewModel.addItemButtonPressed()
} label: {
Image("plus.customize")
.resizable()
.scaledToFit()
.frame(width: 22, height: 22)
.padding(17)
.background(Color("primary"))
.clipShape(Circle())
}
.padding(.trailing)
.padding(.bottom)
}
}

SwiftUI : Using NavigationView leads to image and text gone

What I'm gonna do is..
If I click a menu, then it goes to a detailed menu-description page.
but It seems to something wrong. the code is the below.
[contentview.swift]
var body: some View {
VStack(alignment:.leading){
List{
Text("Menu")
.font(.title)
.fontWeight(.heavy)
ForEach(menu){ section in
Section(header: Text(section.name) , content: {
ForEach(section.items.indices)
{
index in ItemRow(item:section.items[index])
}
})
}
}.listStyle(GroupedListStyle())
}
}
[ItemRow.swift]
struct ItemRow: View {
let item: MenuItem
var body: some View {
VStack{
//NavigationView{
NavigationLink(destination: ItemDetail(item:item)) {
HStack{
Image(item.thumbnailImage)
VStack(alignment:.leading){
Text(item.name)
.font(.headline)
Text("$\(item.price)")
}
}
}
//}
}
}
}
I intentionally commented out the 'NaviagationView'.
because If I activate that comment relating to NavigationNiew..
See? It seems weird. I still wonder what i did wrong..
Before adding the navigation code, the menu was shown on the Preview well.
Could you give me some tips?
===============================
My Problem has been solved!
[ContentView.swift]
struct ContentView: View {
var body: some View {
ItemList()
}
}
[ItemList.swift]
struct ItemList: View {
var body: some View {
NavigationView{
VStack(alignment:.leading){
List{
Text("Menu")
.font(.title)
.fontWeight(.heavy)
ForEach(menu){ section in
Section(header: Text(section.name) , content: {
ForEach(section.items.indices)
{
index in
//ItemRow(item:section.items[index])
NavigationLink(destination: ItemDetail(item:section.items[index])) {
HStack{
Image(section.items[index].thumbnailImage)
VStack(alignment:.leading){
Text(section.items[index].name)
.font(.headline)
Text("$\(section.items[index].price)")
}
}
}
}
})
}
}.listStyle(GroupedListStyle())
}
}
}
}
There is usually only one NavigationView in an app. It is usually the outer most View.
In this case put it above the VStack in the ContentView.
One of the most common exceptions are sheets.

is it possible get List array to load horizontally in swiftUI?

Do I need to dump using List and just load content into a Scrollview/HStack or is there a horizontal equivalent to stack? I would like to avoid having to set it up differently, but am willing todo so if there is no alternative... it just means recoding multiple other views.
current code for perspective:
import SwiftUI
import Combine
struct VideoList: View {
#Environment(\.presentationMode) private var presentationMode
#ObservedObject private(set) var viewModel: ViewModel
#State private var isRefreshing = false
var btnBack : some View { Button(action: {
self.presentationMode.wrappedValue.dismiss()
}) {
HStack {
Image("Home") // set image here
.aspectRatio(contentMode: .fit)
.foregroundColor(.white)
}
}
}
var body: some View {
NavigationView {
List(viewModel.videos.sorted { $0.id > $1.id}, id: \.id) { video in
NavigationLink(
destination: VideoDetails(viewModel: VideoDetails.ViewModel(video: video))) {
VideoRow(video: video)
}
}
.onPullToRefresh(isRefreshing: $isRefreshing, perform: {
self.viewModel.fetchVideos()
})
.onReceive(viewModel.$videos, perform: { _ in
self.isRefreshing = false
})
}
.onAppear(perform: viewModel.fetchVideos)
.navigationViewStyle(StackNavigationViewStyle())
.navigationBarBackButtonHidden(true)
.navigationBarItems(leading: btnBack)
}
}
In general, List is List and it by design is vertical-only. For all horizontal case we should use ScrollView+HStack or ScrollView+LazyHStack (SwiftUI 2.0).
Anyway here is a simple demo of possible way that can be applicable in some particular cases. Prepared & tested with Xcode 12 / iOS 14.
Note: all tuning and alignments fixes are out of scope - only possibility demo.
struct TestHorizontalList: View {
let data = Array(1...20)
var body: some View {
GeometryReader { gp in
List {
ForEach(data, id: \.self) {
RowDataView(item: $0)
.rotationEffect(.init(degrees: 90)) // << rotate content back
}
}
.frame(height: gp.size.width) // initial fit in screen
.rotationEffect(.init(degrees: -90)) // << rotate List
}
}
}
struct RowDataView: View {
let item: Int
var body: some View {
RoundedRectangle(cornerRadius: 25.0).fill(Color.blue)
.frame(width: 80, height: 80)
.overlay(
Text("\(item)")
)
}
}

SwiftUI 2 Observable objects in one view which depend on each other

Thanks for all the support I have received, I trying to build an macos app that tags pdfs for machine learning purposes. I have followed Stanford SwiftUI course, and I want to create main view for my app that contains the document and to type a regex string to find in the document. The deal is I need to create a document chooser, to add documents to be analized, but I don't know how to deal with 2 view models in the same view. In fact one of those view models depend on the other one. The solution I found (not a solution a messy workaround) is to initialize the document manager as a separate view and use it as a navigation view, with a navigation link, but the look is horrible. I'll paste the code and explain it better.
This is the stores view
struct PDFTaggerDocumentStoreView: View {
#EnvironmentObject var store:PDFTaggerDocumentStore
var body: some View {
NavigationView {
List {
Spacer()
Text("Document Store").fontWeight(.heavy)
Button(action: {self.store.addDocument()}, label: {Text("Add document")})
Divider()
ForEach(store.documents){ doc in
NavigationLink(destination: PDFTaggerMainView(pdfTaggerDocument: doc)) {
Text(self.store.name(for: doc))
}
}
.onDelete { indexSet in
indexSet.map{self.store.documents[$0]}.forEach { (document) in
self.store.removeDocuments(document)
}
}
}
}
}
}
The main view.
struct PDFTaggerDocumentView: View {
#ObservedObject var document:PDFTaggerDocument
#State private var expression = ""
#State private var regexField = ""
#State private var showExpressionEditor = false
var body: some View {
VStack {
ZStack {
RoundedRectangle(cornerRadius: 15, style: .continuous)
.stroke(Color.white, lineWidth: 0.5)
.frame(width: 600)
.padding()
VStack {
Text("Try expression ")
HStack {
TextField("Type regex", text: $document.regexString)
.frame(width: 200)
Image(nsImage: NSImage(named: "icons8-save-80")!)
.scaleEffect(0.3)
.onTapGesture {
self.showExpressionEditor = true
print(self.document.regexString)
print(self.regexField)
}
.popover(isPresented: $showExpressionEditor) {
ExpressionEditor().environmentObject(self.document)
.frame(width: 200, height: 300)
}
}
Picker(selection: $expression, label: EmptyView()) {
ForEach(document.expressionNames.sorted(by: >), id:\.key) { key, value in
Text(key)
}
}
Button(action: self.addToDocument, label: {Text("Add to document")})
.padding()
.frame(width: 200)
}
.frame(width:600)
.padding()
}
.padding()
Rectangle()
.foregroundColor(Color.white).overlay(OptionalPDFView(pdfDocument: document.backgroundPDF))
.frame(width:600, height:500)
.onDrop(of: ["public.file-url"], isTargeted: nil) { (providers, location) -> Bool in
let result = providers.first?.hasItemConformingToTypeIdentifier("public.file-url")
providers.first?.loadDataRepresentation(forTypeIdentifier: "public.file-url") { data, error in
if let safeData = data {
let newURL = URL(dataRepresentation: safeData, relativeTo: nil)
DispatchQueue.main.async {
self.document.backgroundURL = newURL
}
}
}
return result!
}
}
}
I'd like to be able to initialize both views models in the same view, and make the document view, be dependent on the document chooser model.
Is there a way I can do it?
Thanks a lot for your time.