Let me explain, I have a parent view with a SearchBarView, im passing down a focus state binding like this .
SearchBarView(searchText:$object.searchQuery, searching: $object.searching, focused: _searchIsFocused
That works perfectly as #FocusState var searchIsFocused: Bool is defined in parent view passing it down to the SearchBarView (child view ). In parent I can check the change in value and everything ok.
The problem relies when in parent I have the SearchBarView inside .toolbar {} and ToolBarItem(). nothing happens, not change in value of focus, etc. I have my SearchBarView in the top navigation bar and still want to use it there.. but I need to be able to know when it is in focus. if I use inside any VStack or whatever, everything perfectly..
-- EDIT --
providing more code to test
SearchBarView
struct SearchBarView: View {
#Environment(\.colorScheme) var colorScheme
#Binding var searchText: String
#Binding var searching: Bool
#FocusState var focused: Bool
var body: some View {
ZStack {
Rectangle()
.foregroundColor(colorScheme == .dark ? Color("darkSearchColor") : Color.white)
.overlay(
RoundedRectangle(cornerRadius: 13)
.stroke(.black.opacity(0.25), lineWidth: 1)
)
HStack {
Image(systemName: "magnifyingglass").foregroundColor( colorScheme == .dark ? .gray : .gray )
TextField("Search..", text: $searchText )
.focused($focused, equals: true)
.padding(EdgeInsets(top: 0, leading: 0, bottom: 0, trailing: 20))
.disableAutocorrection(true).onSubmit {
let _ = print("Search textfield Submited by return button")
}
}
.foregroundColor(colorScheme == .dark ? Color("defaultGray") :.gray)
.padding(.leading, 13)
.padding(.trailing, 20).overlay(
HStack {
Spacer()
if searching {
ActivityIndicator().frame(width:15,height:15).aspectRatio(contentMode: .fit).padding(.trailing,15)
}
}
)
.onChange(of: focused) { searchIsFocused in
let _ = print("SEARCH IS FOCUSED VALUE: \(searchIsFocused) ")
}
}
.frame(height: 36)
.cornerRadius(13)
}
}
-- home View Code --
struct HomeView: View {
#Environment(\.colorScheme) var colorScheme
#FocusState var searchIsFocused: Bool
#State var searching:Bool = false
#State var searchQuery: String = ""
var body: some View {
NavigationStack {
GeometryReader { geofull in
ZStack(alignment: .bottom) {
Color("background")//.edgesIgnoringSafeArea([.all])
ScrollView(showsIndicators: false) {
VStack {
// Testing Bar inside VStack.. Here It Works. comment the bar the leave
// the one inside the .toolbar ToolbarItem to test
SearchBarView(searchText:$searchQuery, searching: $searching, focused: _searchIsFocused).padding(0)
}.toolbar {
//MARK: Navbar search field
ToolbarItem(placement:.principal) {
SearchBarView(searchText:$searchQuery, searching: $searching, focused: _searchIsFocused).padding(0)
}
}
.onChange(of: searchIsFocused) { searchIsFocused in
let _ = print("HOME VIEW searchIsFocused VALUE: \(searchIsFocused) ")
}
}
}
}
}
}
}
Related
I'm trying to change a view in response to changing a Toggle. I figure out a way to do it as long as I mirror the state value the toggle is using.
Is there a way to do it without creating another variable?
Here's my code. You can see that there are three animations triggered.
import SwiftUI
struct OverlayView: View {
#State var toggle: Bool = false
#State var animatedToggle: Bool = false
var body: some View {
VStack {
Image(systemName: "figure.arms.open")
.resizable()
.scaledToFit()
.foregroundColor(animatedToggle ? .green : .red) // << animated
.opacity(animatedToggle ? 1 : 0.2) // << animated
if animatedToggle { // << animated
Spacer()
}
Toggle("Overlay", isOn: $toggle)
.onChange(of: toggle) { newValue in
withAnimation {
animatedToggle = toggle
}
}
}
}
}
Just use the .animation view modifier
.animation(.default, value: toggle)
Then remove the second variable
struct OverlayView: View {
#State var toggle: Bool = false
var body: some View {
VStack {
Image(systemName: "figure.arms.open")
.resizable()
.scaledToFit()
.foregroundColor(toggle ? .green : .red)
.opacity(toggle ? 1 : 0.2)
if toggle {
Spacer()
}
Toggle("Overlay", isOn: $toggle)
}.animation(.default, value: toggle)
}
}
I'm seeing very strange behavior within a view. Here's my layout:
struct EventDetailViewContainer: View {
let eventID: EventRecord.ID
#State var event: EventRecord = EventRecord(keyResults: [], text: "", achievesKR: false)
#State var editing: Bool = true
var body: some View {
if #available(iOS 15.0, *) {
VStack {
HStack {
Spacer()
Toggle("Editing", isOn: $editing)
.padding()
}
EventDetailView(event: $event, editing: $editing)
}
} else {
// Fallback on earlier versions
}
}
}
#available(iOS 15.0, *)
struct EventDetailView: View {
#Binding var event: EventRecord
#Binding var editing: Bool
#FocusState var textIsFocused: Bool
var body: some View {
VStack {
TextField(
"Event text",
text: $event.text
)
.focused($textIsFocused)
.disabled(!editing)
.padding()
DatePicker("Event Date:", selection: $event.date)
.disabled(!editing)
.padding()
Toggle("Goal is Reached?", isOn: $event.achievesKR)
.disabled(!editing)
.padding()
HStack {
Text("Notes:")
Spacer()
}
.padding()
TextEditor(text: $event.notes)
.disabled(!editing)
.padding()
Spacer()
}
}
}
struct EventRecord: Identifiable, Equatable {
typealias ID = Identifier
struct Identifier: Identifiable, Equatable, Hashable {
typealias ID = UUID
let id: UUID = UUID()
}
let id: ID
var keyResults: [KeyResult.ID]
var date: Date
var text: String
var notes: String
var achievesKR: Bool
init(
id: ID = ID(),
keyResults: [KeyResult.ID],
date: Date = Date(),
text: String,
notes: String = "",
achievesKR: Bool
) {
self.id = id
self.keyResults = keyResults
self.date = date
self.text = text
self.notes = notes
self.achievesKR = achievesKR
}
}
So this works perfectly when I run it as an iPad app, but when I run it on the simulator, the the top toggle doesn't respond to text input.
The strange thing is, when I simply duplicate the toggle, the top one doesn't work and the bottom one works perfectly:
struct EventDetailViewContainer: View {
let eventID: EventRecord.ID
#State var event: EventRecord = EventRecord(keyResults: [], text: "", achievesKR: false)
#State var editing: Bool = true
var body: some View {
if #available(iOS 15.0, *) {
VStack {
HStack {
Spacer()
Toggle("Editing", isOn: $editing)
.padding()
}
HStack {
Spacer()
Toggle("Editing", isOn: $editing)
.padding()
}
EventDetailView(event: $event, editing: $editing)
}
} else {
// Fallback on earlier versions
}
}
}
It seems like this should be totally unrelated to the touch behavior of the other views.
Btw this is being displayed in the context of a navigation view.
Is there anything that can explain this? And how can I get it working without adding this extra view on top?
edit: Here's a gif of this behavior being demonstrated. The two controls are exactly the same, but the lower one responds to touch and the upper one does not.
Problem:
I am unable to force my alpha, beta, or gamma buttons to turn ON when an input parameter is passed from Landing.swift.
I do not understand why when onAppear fires in the stack, the output becomes:
gamma is the title
beta is the title
alpha is the title
gamma is the title
beta is the title
alpha is the title
Confused -> Why is this outputting 2x when the ForEach loop has only 3 elements inside?
Background:
I am trying to pass a parameter from one view (Landing.swift) to another (ContentView.swift) and then based on that parameter force the correct button (in ContentView) to trigger an ON state so it's selected. I have logic shown below in ButtonOnOff.swift that keeps track of what's selected and not.
For instance, there are 3 buttons in ContentView (alpha, beta, and gamma) and based on the selected input button choice from Landing, the respective alpha, beta, or gamma button (in ContentView) should turn ON.
I am dynamically generating these 3 buttons in ContentView and want the flexibility to extend to possibly 10 or more in the future. Hence why I'm using the ForEach in ContentView. I need some help please understanding if I'm incorrectly using EnvironmentObject/ObservedObject or something else.
Maintaining the ON/OFF logic works correctly with the code. That is, if you manually press alpha, it'll turn ON but the other two will turn OFF and so forth.
Thanks for your help in advance! :)
Testing.swift
import SwiftUI
#main
struct Testing: App {
#StateObject var buttonsEnvironmentObject = ButtonOnOff()
var body: some Scene {
WindowGroup {
Landing().environmentObject(buttonsEnvironmentObject)
}
}
}
Landing.swift
import SwiftUI
struct Landing: View {
#State private var tag:String? = nil
var body: some View {
NavigationView {
ZStack{
HStack{
NavigationLink(destination: ContentView(landingChoice:tag ?? ""), tag: tag ?? "", selection: $tag) {
EmptyView()
}
Button(action: {
self.tag = "alpha"
}) {
HStack {
Text("alpha")
}
}
Button(action: {
self.tag = "beta"
}) {
HStack {
Text("beta")
}
}
Button(action: {
self.tag = "gamma"
}) {
HStack {
Text("gamma")
}
}
}
.navigationBarHidden(true)
}
.navigationViewStyle(StackNavigationViewStyle())
}
}
}
ContentView.swift
import SwiftUI
struct ContentView: View {
var btnName:String
#EnvironmentObject var buttonEnvObj:ButtonOnOff
init(landingChoice:String){
self.btnName = landingChoice
print("\(self.btnName) is the input string")
}
var body: some View {
VStack{
Form{
Section{
ScrollView(.horizontal, showsIndicators: false) {
HStack(spacing:10) {
ForEach(0..<buttonEnvObj.buttonNames.count) { index in
BubbleButton(label: "\(buttonEnvObj.buttonNames[index])")
.padding(EdgeInsets(top: 5, leading: 5, bottom: 5, trailing: 0))
.onAppear {
print("\(buttonEnvObj.buttonNames[index]) is the title")
}
}
}
}.frame(height: 50)
}
}
}
}
}
struct BubbleButton: View{
#EnvironmentObject var buttonBrandButtons:ButtonOnOff
var label: String
var body: some View{
HStack{
Button(action: {
print("Button action")
buttonBrandButtons.changeState(buttonName: self.label)
}) {
ZStack {
VStack{
HStack {
Spacer()
Text(label)
.font(.system(size: 12,weight:.regular, design: .default))
.foregroundColor(buttonBrandButtons.buttonBrand[self.label]! ? Color.white : Color.gray)
Spacer()
}
}
.frame(height:30)
.fixedSize()
}
}
.background(buttonBrandButtons.buttonBrand[self.label]! ? Color.blue : .clear)
.cornerRadius(15)
.overlay(buttonBrandButtons.buttonBrand[self.label]! ?
RoundedRectangle(cornerRadius: 15).stroke(Color.blue,lineWidth:1) : RoundedRectangle(cornerRadius: 15).stroke(Color.gray,lineWidth:1))
.animation(.linear, value: 0.15)
}
}
}
ButtonOnOff.swift
import Foundation
class ButtonOnOff:ObservableObject{
var buttonNames = ["alpha","beta","gamma"]
#Published var buttonBrand:[String:Bool] = [
"alpha":false,
"beta":false,
"gamma":false
]
func changeState(buttonName:String) -> Void {
for (key,_) in buttonBrand{
if key == buttonName && buttonBrand[buttonName] == true{
buttonBrand[buttonName] = false
} else{
buttonBrand[key] = (key == buttonName) ? true : false
}
}
print(buttonBrand)
}
}
For a short answer just add
.onAppear(){
buttonEnvObj.changeState(buttonName: self.btnName)
}
to ContentView that will highlight the button that was selected.
As for a solution that can be expanded at will. I would suggest a single source of truth for everything and a little simplifying.
struct Landing: View {
#EnvironmentObject var buttonEnvObj:ButtonOnOff
#State private var tag:String? = nil
var body: some View {
NavigationView {
ZStack{
HStack{
NavigationLink(destination: ContentView(), tag: tag ?? "", selection: $tag) {
EmptyView()
}
//Put your buttons here
HStack{
//Use the keys of the dictionary to create the buttons
ForEach(buttonEnvObj.buttonBrand.keys.sorted(by: <), id: \.self){ key in
//Have the button set the value when pressed
Button(action: {
self.tag = key
buttonEnvObj.changeState(buttonName: key)
}) {
Text(key)
}
}
}
}
.navigationBarHidden(true)
}
.navigationViewStyle(StackNavigationViewStyle())
}
}
}
struct ContentView: View {
#EnvironmentObject var buttonEnvObj:ButtonOnOff
var body: some View {
VStack{
Form{
Section{
ScrollView(.horizontal, showsIndicators: false) {
HStack(spacing:10) {
//Change this to use the dictionary
ForEach(buttonEnvObj.buttonBrand.sorted(by: {$0.key < $1.key }), id:\.key) { key, value in
BubbleButton(key: key, value: value)
.padding(EdgeInsets(top: 5, leading: 5, bottom: 5, trailing: 0))
.onAppear {
print("\(value) is the title")
}
}
}
}.frame(height: 50)
}
}
}
}
}
struct BubbleButton: View{
#EnvironmentObject var buttonBrandButtons:ButtonOnOff
var key: String
var value: Bool
var body: some View{
HStack{
Button(action: {
print("Button action")
buttonBrandButtons.changeState(buttonName: key)
}) {
ZStack {
VStack{
HStack {
Spacer()
Text(key)
.font(.system(size: 12,weight:.regular, design: .default))
.foregroundColor(value ? Color.white : Color.gray)
Spacer()
}
}
.frame(height:30)
.fixedSize()
}
}
.background(value ? Color.blue : .clear)
.cornerRadius(15)
.overlay(value ?
RoundedRectangle(cornerRadius: 15).stroke(Color.blue,lineWidth:1) : RoundedRectangle(cornerRadius: 15).stroke(Color.gray,lineWidth:1))
.animation(.linear, value: 0.15)
}
}
}
class ButtonOnOff:ObservableObject{
//Get rid of this so you can keep the single source
//var buttonNames = ["alpha","beta","gamma"]
//When you want to add buttons just add them here it will all adjust
#Published var buttonBrand:[String:Bool] = [
"alpha":false,
"beta":false,
"gamma":false
]
func changeState(buttonName:String) -> Void {
for (key,_) in buttonBrand{
if key == buttonName && buttonBrand[buttonName] == true{
buttonBrand[buttonName] = false
} else{
buttonBrand[key] = (key == buttonName) ? true : false
}
}
print(buttonBrand)
}
}
I'm building a custom modal and when I drag the modal, any subviews that have animation's attached, they animate while I'm dragging. How do I stop this from happening?
I thought about passing down an #EnvironmentObject with a isDragging flag, but it's not very scalable (and doesn't work well with custom ButtonStyles)
import SwiftUI
struct ContentView: View {
var body: some View {
Text("Hello, world!")
.padding()
.showModal(isShowing: .constant(true))
}
}
extension View {
func showModal(isShowing: Binding<Bool>) -> some View {
ViewOverlay(isShowing: isShowing, presenting: { self })
}
}
struct ViewOverlay<Presenting>: View where Presenting: View {
#Binding var isShowing: Bool
let presenting: () -> Presenting
#State var bottomState: CGFloat = 0
var body: some View {
ZStack(alignment: .center) {
presenting().blur(radius: isShowing ? 1 : 0)
VStack {
if isShowing {
Container()
.background(Color.red)
.offset(y: bottomState)
.gesture(
DragGesture()
.onChanged { value in
bottomState = value.translation.height
}
.onEnded { _ in
if bottomState > 50 {
withAnimation {
isShowing = false
}
}
bottomState = 0
})
.transition(.move(edge: .bottom))
}
}
}
}
}
struct Container: View {
var body: some View {
// I want this to not animate when dragging the modal
Text("CONTAINER")
.frame(maxWidth: .infinity, maxHeight: 200)
.animation(.spring())
}
}
UPDATE:
extension View {
func animationsDisabled(_ disabled: Bool) -> some View {
transaction { (tx: inout Transaction) in
tx.animation = tx.animation
tx.disablesAnimations = disabled
}
}
}
Container()
.animationsDisabled(isDragging || bottomState > 0)
In real life the Container contains a button with an animation on its pressed state
struct MyButtonStyle: ButtonStyle {
func makeBody(configuration: Self.Configuration) -> some View {
configuration.label
.scaleEffect(configuration.isPressed ? 0.9 : 1)
.animation(.spring())
}
}
Added the animationsDisabled function to the child view which does in fact stop the children moving during the drag.
What it doesn't do is stop the animation when the being initially slide in or dismissed.
Is there a way to know when a view is essentially not moving / transitioning?
Theoretically SwiftUI should not translate animation in this case, however I'm not sure if this is a bug - I would not use animation in Container in that generic way. The more I use animations the more tend to join them directly to specific values.
Anyway... here is possible workaround - break animation visibility by injecting different hosting controller in a middle.
Tested with Xcode 12 / iOS 14
struct ViewOverlay<Presenting>: View where Presenting: View {
#Binding var isShowing: Bool
let presenting: () -> Presenting
#State var bottomState: CGFloat = 0
var body: some View {
ZStack(alignment: .center) {
presenting().blur(radius: isShowing ? 1 : 0)
VStack {
Color.clear
if isShowing {
HelperView {
Container()
.background(Color.red)
}
.offset(y: bottomState)
.gesture(
DragGesture()
.onChanged { value in
bottomState = value.translation.height
}
.onEnded { _ in
if bottomState > 50 {
withAnimation {
isShowing = false
}
}
bottomState = 0
})
.transition(.move(edge: .bottom))
}
Color.clear
}
}
}
}
struct HelperView<Content: View>: UIViewRepresentable {
let content: () -> Content
func makeUIView(context: Context) -> UIView {
let controller = UIHostingController(rootView: content())
return controller.view
}
func updateUIView(_ uiView: UIView, context: Context) {
}
}
In Container, declare a binding var so you can pass the bottomState to the Container View:
struct Container: View {
#Binding var bottomState: CGFloat
.
.
.
.
}
Dont forget to pass bottomState to your Container View wherever you use it:
Container(bottomState: $bottomState)
Now in your Container View, you just need to declare that you don't want an animation while bottomState is being changed:
Text("CONTAINER")
.frame(maxWidth: .infinity, maxHeight: 200)
.animation(nil, value: bottomState) // You Need To Add This
.animation(.spring())
In .animation(nil, value: bottomState), by nil you are asking SwiftUI for no animations, while value of bottomState is being changed.
This approach is tested using Xcode 12 GM, iOS 14.0.1.
You must use the modifiers of the Text in the order i put them. that means that this will work:
.animation(nil, value: bottomState)
.animation(.spring())
but this won't work:
.animation(.spring())
.animation(nil, value: bottomState)
I also made sure that adding .animation(nil, value: bottomState) will only disable animations when bottomState is being changed, and the animation .animation(.spring()) should always work if bottomState is not being changed.
So this is my updated answer. I don't think there is a pretty way to do it so now I am doing it with a custom Button.
import SwiftUI
struct ContentView: View {
#State var isShowing = false
var body: some View {
Text("Hello, world!")
.padding()
.onTapGesture(count: 1, perform: {
withAnimation(.spring()) {
self.isShowing.toggle()
}
})
.showModal(isShowing: self.$isShowing)
}
}
extension View {
func showModal(isShowing: Binding<Bool>) -> some View {
ViewOverlay(isShowing: isShowing, presenting: { self })
}
}
struct ViewOverlay<Presenting>: View where Presenting: View {
#Binding var isShowing: Bool
let presenting: () -> Presenting
#State var bottomState: CGFloat = 0
#State var isDragging = false
var body: some View {
ZStack(alignment: .center) {
presenting().blur(radius: isShowing ? 1 : 0)
VStack {
if isShowing {
Container()
.background(Color.red)
.offset(y: bottomState)
.gesture(
DragGesture()
.onChanged { value in
isDragging = true
bottomState = value.translation.height
}
.onEnded { _ in
isDragging = false
if bottomState > 50 {
withAnimation(.spring()) {
isShowing = false
}
}
bottomState = 0
})
.transition(.move(edge: .bottom))
}
}
}
}
}
struct Container: View {
var body: some View {
CustomButton(action: {}, label: {
Text("Pressme")
})
.frame(maxWidth: .infinity, maxHeight: 200)
}
}
struct CustomButton<Label >: View where Label: View {
#State var isPressed = false
var action: () -> ()
var label: () -> Label
var body: some View {
label()
.scaleEffect(self.isPressed ? 0.9 : 1.0)
.gesture(DragGesture(minimumDistance: 0).onChanged({_ in
withAnimation(.spring()) {
self.isPressed = true
}
}).onEnded({_ in
withAnimation(.spring()) {
self.isPressed = false
action()
}
}))
}
}
The problem is that you can't use implicit animations inside the container as they will be animated when it moves. So you need to explicitly set an animation using withAnimation also for the button pressed, which I now did with a custom Button and a DragGesture.
It is the difference between explicit and implicit animation.
Take a look at this video where this topic is explored in detail:
https://www.youtube.com/watch?v=3krC2c56ceQ&list=PLpGHT1n4-mAtTj9oywMWoBx0dCGd51_yG&index=11
I made a SearchBarView view to use in various other views (for clarity, I removed all the layout modifiers, such as color and padding):
struct SearchBarView: View {
#Binding var text: String
#State private var isEditing = false
var body: some View {
HStack {
TextField("Search…", text: $text, onCommit: didPressReturn)
.overlay(
HStack {
Image(systemName: "magnifyingglass")
.frame(minWidth: 0, maxWidth: .infinity, alignment: .leading)
if isEditing {
Button(action: {
self.text = ""
}) {
Image(systemName: "multiply.circle.fill")
}
}
}
)
}
func didPressReturn() {
print("did press return")
}
}
It looks and works great to filter data in a List.
But now I'd like to use the SearchBarView to search an external database.
struct SearchDatabaseView: View {
#Binding var isPresented: Bool
#State var searchText: String = ""
var body: some View {
NavigationView {
VStack {
SearchBarView(text: $searchText)
// need something here to respond to onCommit and initiate a network call.
}
.navigationBarTitle("Search...")
.navigationBarItems(trailing:
Button(action: { self.isPresented = false }) {
Text("Done")
})
}
}
}
For this, I only want to start the network access when the user hits return. So I added the onCommit part to SearchBarView, and the didPressReturn() function is indeed only called when tapping return. So far, so good.
What I don't understand is how SearchDatabaseView that contains the SearchBarView can respond to onCommit and initiate the database searh - how do I do that?
Here is possible approach
struct SearchBarView: View {
#Binding var text: String
var onCommit: () -> () = {} // inject callback
#State private var isEditing = false
var body: some View {
HStack {
TextField("Search…", text: $text, onCommit: didPressReturn)
.overlay(
HStack {
Image(systemName: "magnifyingglass")
.frame(minWidth: 0, maxWidth: .infinity, alignment: .leading)
if isEditing {
Button(action: {
self.text = ""
}) {
Image(systemName: "multiply.circle.fill")
}
}
}
)
}
func didPressReturn() {
print("did press return")
// do internal things...
self.onCommit() // << external callback
}
}
so now in SearchDatabaseView you can
VStack {
SearchBarView(text: $searchText) {
// do needed things here ...
}
}