Hi, asking this here because this is not about google maps ios sdk issue but regarding the use of binding. My map view currently looks simple. import SwiftUI import GoogleMaps import GoogleMapsUtils struct MapView: UIViewRepresentable {       var geoJsonParser: GMUGeoJSONParser?       func makeUIView(context: Self.Context) -> GMSMapView {     let mapView = GMSMapView.map(withFrame: CGRect.zero, camera: GMSCameraPosition())     mapView.delegate = context.coordinator     return mapView   }       func updateUIView(_ mapView: GMSMapView, context: Context) {     mapView.clear()           if let geoJsonParser {       print(geoJsonParser.features)     }   }       func makeCoordinator() -> Coordinator {     Coordinator(owner: self)   }     } class Coordinator: NSObject, GMSMapViewDelegate {      let owner: MapView       init(owner: MapView) {     self.owner = owner   }       func mapView(_ mapView: GMSMapView, didTapAt coordinate: CLLocationCoordinate2D) {     print("tapped at coordinate")     print(owner)   } } class Coordinator: NSObject, GMSMapViewDelegate {      let owner: MapView       init(owner: MapView) {     self.owner = owner   }       func mapView(_ mapView: GMSMapView, didTapAt coordinate: CLLocationCoordinate2D) {     print("tapped at coordinate")     print(owner.geoJsonParser)   } } My question is when i tap on the map, the mapView didTapAtCoordinate gets called but the geoJsonParser variable is always nil. So I thought i would use Binding in this case since when the MapView struct is used, I pass a @State geoJsonParser to its parameter. My question is, from within the MapView struct, I am not sure what else I could be lacking so that print(owner.geoJsonParser) will not return nil I tried to set the variable to var geoJsonParser: Binding? = nil But after tapping on the map and the mapView didTapAtCoordinate is called, print(owner.geoJsonParser) returns an error Cannot convert value of type 'Binding<[any GMUGeometryContainer]>' to expected argument type '[any GMUGeometryContainer]' Same error message in the print statement in updateUIView(). Any idea what could be wrong here? My goal is to have owner.geoJsonFeature not be nil.

A sample struct code struct Test { @Binding var name: String? } Why does it force me to have to instantiate it with Test(name: "blabla") Is there a way to not have to initialize this in the param? since It is an optional type. Binding<String?> works differently from @Binding, so ive read. Though one can do Binding<String?>? or is this the only possible way to do it?

Hi. I am not sure why i get the error message AttributeGraph: cycle detected through attribute but this does happen i noticed if i have a Text component render html. Here is the code import SwiftUI struct ContentView: View {   @State private var isShowingAlertSheet = false   @State private var alertTitle: String?   @State private var alertDescription: String?       var body: some View {     VStack {       Button(         "click me", action: {           alertTitle = "TITLE HERE"           alertDescription = "<b>hey</b>"           isShowingAlertSheet = true         }       )     }     .sheet(isPresented: $isShowingAlertSheet) {       DetailView(alertTitle: $alertTitle, alertDescription: $alertDescription)     }   } } struct ContentView_Previews: PreviewProvider {   static var previews: some View {     ContentView()   } } struct DetailView: View {       @Binding var alertTitle: String?   @Binding var alertDescription: String?       var body: some View {     VStack {       Text(alertTitle ?? "")         .font(.system(size: 20))         .padding(.top, 10)         .padding(.bottom, 0)         .presentationDetents([.height(250)])       Text(fixTextSize(alertDescription?.htmlMutableAttributedString))         .frame(maxWidth: .infinity)         .padding(.top, 10)       Spacer()     }     .padding()   }       func fixTextSize(_ mutableAttributedString: NSMutableAttributedString?) -> AttributedString {     if let mutableAttributedString {       mutableAttributedString.addAttribute(NSAttributedString.Key.font, value: UIFont.systemFont(ofSize: 16), range: NSMakeRange(0, mutableAttributedString.length))       return AttributedString(mutableAttributedString)     }     return AttributedString()   } } extension String {   var htmlMutableAttributedString: NSMutableAttributedString? {     if let attributedString = try? NSMutableAttributedString(data: Data(self.utf8), options: [.documentType: NSAttributedString.DocumentType.html], documentAttributes: nil) {       attributedString.addAttribute(NSAttributedString.Key.foregroundColor, value: UIColor(.black), range: NSMakeRange(0, attributedString.length))       return attributedString     }     return nil   } } Thoughts?

I wish to ask suggestion on how to avoid this. i dont want every tab switch to reload the component..worse, fetch from url s this where mvvm comes in? so that even if component is reloaded, the mvvm data will be used? i think it is overkill though. my first and 3rd tab fetches data and loads markers in a map. my 2nd tab is a wkwebview that loads a url i noticed that whej i switch to the 3rd tab, the 1st tab gets reloaded still. thoughts on how to avood reloading? also tried setting tag to each tab item and setting a state variable to tab view to keep track of tab switching. to no avail. thoughts?

I have managed to do tasks when an info window of a GMSMarker is clicked. This is where the magic happens func mapView(_ mapView: GMSMapView, didTapInfoWindowOf marker: GMSMarker) However, this time, I wish to open a custom view as a new window. I have not seen any helpful posts so I decided to try and ask the question here if anyone has experienced doing so. My goal is when the info window is clicked, i wish to open my custom view as a new window. Currently, I only know NavigationView and NavigationLink when opening up new windows but I am not sure how to use this in a GMSMarker info window click event. Thoughts?

struct Test { var body: some View {     AsyncView(       operation: { try await getData("https://localhost") },       content: { json         Text("data retrieved")       }     )   } func getData(_ url: String) async throws -> String {     return try await getRequest(url)   } } static func getRequest(_ sourceData: String?, _ useWindowsChar1252: Bool = false) async throws -> String {     guard let sourceData else {       return ""     }           var request = URLRequest(url: URL(string: sourceData.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!)!)     request.httpMethod = "get"           let (data, _) = try await URLSession(configuration: .ephemeral).data(for: request)     return useWindowsChar1252 ?       String(data: data, encoding: .windowsCP1252)! :       String(decoding: data, as: UTF8.self)   } You can just have one tab item in the TabView and the http request keeps on looping. any idea? struct MyTabView: View {       var body: some View { TabView { Test()         .tabItem {           Label("test", systemImage: "leaf")         } } } } Trying to understand the cause. Because If I put the AsyncView, say inside a ZStack, it works ok. Thoughts?

Hi. My view gets animated with a call frmo a block of code withAnimation.{ } how can i place this inside the view so that the binding variable will be the one to trigger the animation. Same as how sheets work. THis is my sample view import SwiftUI struct GradientLegendView: View {       @Binding var isShowingLegend: Bool       var labels: [String]?   var colors: [Color]?   var width: Float   var height: Float   var viewRect = Rectangle()       var body: some View {     if isShowingLegend {       HStack {         VStack {           if let labels {             ForEach(labels, id:\.self) { label in               Text(label)                 .frame(maxWidth: .infinity, alignment: .leading)                 .font(.system(size: 14))                 .foregroundColor(.black)                 .backgroundStyle(.red)                 .padding(0)                               if label != labels.last {                 Spacer()               }             }           }         }         .frame(maxHeight: .infinity)         .padding(8)         Rectangle()           .foregroundColor(.clear)           .background(LinearGradient(gradient: Gradient(colors: colors ?? []), startPoint: .top, endPoint: .bottom))           .padding(8)           .frame(width: 30)       }       .frame(width: CGFloat(width), height: CGFloat(height))       .background(.white.opacity(0.7))       .cornerRadius(5)       .shadow(color: Color.gray.opacity(0.7), radius: 8, x: 0, y: 0)       .padding()       .transition(.move(edge: isShowingLegend ? .leading : .trailing))     }   } } struct GradientLegendView_Previews: PreviewProvider {       static var previews: some View {     GradientLegendView(       isShowingLegend: .constant(true),       labels: SampleData.createHeatmapLegendLabelArray(),       colors: SampleData.createHeatmapLegendColorArray(),       width: 120,       height: 200     )   } } struct Sample { static func createHeatmapLegendLabelArray() -> [String] {     return ["Great", "Major", "Strong", "Moderate", "Small"]   }        func createHeatmapLegendColorArray() -> [Color] {     return [.red, .purple, .orange, .green]   } } And i use it here and run the animation using withAnimation { } @State private var isShowingLegend = true var body: some View {     Text("Hey") .frame(maxWidth: .infinity, maxHeight: .infinity)     .edgesIgnoringSafeArea(.all)     .task {       setupMenuItems()     }     .overlay(       HStack {           GradientLegendView(             isShowingLegend: $isShowingLegend,             labels: SampleData.createHeatmapLegendLabelArray(),             colors: SampleData.createHeatmapLegendColorArray(),             width: 120,             height: 200)         Spacer()       },       alignment: .bottom     ) } Now, say i also have a button instead of Text("hey") where the action code is withAnimation(isShowingLegend ? .easeIn(duration: 0.5) : .easeOut(duration: 0.5)) {         isShowingLegend.toggle()       } Is it possible that this withAnimatoin be placed inslide GradientLegendView and will execute if the isShowingLegend value is change?

Ive read posts where you can pass 2 .environmentObject() but what i noticed is that if i call object1.objectWillChange.send() , object2 also is affected is this normal? or supposedly only published properties of object1 only gets affected? discussion quwstion. thoughts?

Hi, i wish to ask for suggestions. I am in a dilemna using an environment object. Please see code. struct ContentView: View {       @State var show = false   @StateObject var appData = AppData()   @StateObject var toolbarData = ToolbarData()   var body: some View {     NavigationStack(path: $appData.path) {       ZStack(alignment: .leading) {         VStack(spacing: 0) {           HStack {             Button(action: {               withAnimation(.default) {                 show.toggle()               }             }) {               Image(systemName: "line.3.horizontal")             }             Text("Home")             Spacer()             ToolbarView()             OverflowMenu()               .padding([.leading], Default.instance.PADDING_BETWEEN_MENU_ITEM)           }           .padding()           .foregroundColor(.primary)           .overlay(Rectangle().stroke(Color.primary.opacity(0.1), lineWidth: 1).shadow(radius: 3).edgesIgnoringSafeArea(.top))           MainContent(navigationManager: navigationManager)             .frame(maxWidth: .infinity, maxHeight: .infinity)         }          .environmentObject(toolbarData)         .background(Color.primary.opacity(self.show ? (self.dark ? 0.05 : 0.2) : 0))       }       .navigationBarHidden(true)     }     .navigationViewStyle(.stack)     .environmentObject(appData)   } } struct ContentView_Previews: PreviewProvider {   static var previews: some View {     ContentView()   } } struct ToolbarView: View {       @Binding var toolbarData: ToolbarData       var body: some View {     HStack {       if let item = toolbarData.toolbarItem, item.visible {         Button {           item.action()         } label: {           if let iconLink = item.iconLink {             NavigationLink(destination: iconLink) {               Image(systemName: item.icon)             }           }           else {             Image(systemName: item.icon)           }         }         .disabled(item.disabled)         .opacity(item.opacity)         .padding([.leading, .trailing], Default.instance.PADDING_BETWEEN_MENU_ITEM)       }   } } final class ToolbarData: ObservableObject {   @Published var toolbarItem: ToolbarItemProperties? } final class ToolbarItemProperties {   var disabled = false } In the MainContent , my code runs this toolbarData.toolbarItemProperties.disabled = false I do not want MainContent to be rebuilt. Inside MainContent, I modify toolbarItemProperties (from an environment object). And i call objectWillChange.send(). Problem is, it will rebuild the ContentView widget including MainContent. What can be the correct approach to having to eb able to change the value of toolbarItemProperties and rebuild it but ignoring MainContent to rebuild again. Thoughts?

I have a model struct struct Temp { var cityUrlId: String {     get {       print(_cityUrlId)       print("gettting="+StringTool.nullToString(_cityUrlId).trim())              return _cityUrlId     }     set(newValue) {       print("newvalue="+newValue)       _cityUrlId = _cityUrlId       print("_cityUrlId="+_cityUrlId!)     }   } } The parent view has a state variable e.g. @State var temp: Temp and a child view as a new window with @Binding var temp: Temp My question is that when the temp in child view sets a value for cityUrlId property, it's ok. but once i set a new value in the parent view, the getter returns nil. why is that? is the solution for this have to be a class for Temp instead of a struct?

struct TideForecastInfoView: View {       var geometryProxy: GeometryProxy       var body: some View {     VStack {       getHeaders(geometryProxy)               TideForecastEntryView(geometryProxy: geometryProxy)           .padding(2)     }     .background(.white)     .clipShape(RoundedRectangle(cornerRadius: 14))     .shadow(radius: 8)   }       @ViewBuilder   func getHeaders(_ geometryProxy: GeometryProxy) -> some View {     HStack {       HStack {         Text("tide")           .frame(maxWidth: geometryProxy.size.width * 0.25)         Text("time")           .frame(maxWidth: geometryProxy.size.width * 0.5)         Text("height")           .frame(maxWidth: geometryProxy.size.width * 0.25)       }       .padding(8)     }     .frame(maxWidth: .infinity)     .background(.gray)   }   } struct TideForecastEntryView: View {       var geometryProxy: GeometryProxy       var body: some View {     HStack {       Text("High Tide")         .frame(maxWidth: geometryProxy.size.width * 0.25)       Text("1:08 AM (Tue 03) January")         .frame(maxWidth: geometryProxy.size.width * 0.5, alignment: .leading)       Text("1.31 m (4.3 ft)")         .frame(maxWidth: geometryProxy.size.width * 0.25)     }   } } Result looks like this 03 should be on the first line and maybe parts of the January word. is there something else missing in the Text view option that i need to declare? Also how to vertical align top for text High Tide. it is always vertically centered. I tried to set alignment: .top in the frame but doesnt do anything. Thoughts?

Apple docs does not have a sample that does this. What do i need to use. My line chart has too many points in the x axis. How to lessen them? I saw something about Chart { } .chartXAxis { // Is this the right property? What should go in here? }

Please see screenshot. Currently the one in white has an animation in the middle. i wish to set the background of the body's view to transparent so that only the animation from my app is visible (it's like the home screen but only my animation is shown when the app is run. Is that possible? I tried to set VStack's background color opacity to 0 but nothing happpens. Or is it something else that needs to be modified? Thoughts?

I have a question regarding releasing an app to a device. I tried to release a debug app but I noticed that when i disconnect the cable from the device, the app cannot be run anymore. So instead, I have to transfer a release app to the device. However, there are some things I do not understand with regards to profiles. Do i have to create a provisioning profile just to be able to have my release built app installed in my iPhone? Or is there another way. Because while looking into this, I came to a conclusion that I have to have a developer account (which forces me to pay 100usd per year). And i have no plans to publish any app until I manage to finish 3 of them. I only plan to get a developer account once. all 3 are tried and tested in a real device. Thoughts?

See sample class class A { var proxy: A init () { proxy = self } } In Java, i could do something like this class A { A proxy; A () { proxy = this } } so when i instantiate A sample = new A(); the proxy variable will be set to the "this" keyword. But in Swift, the only related keyword to it is self but it does not behave the same way. It merely serves somewhat of a pointer to properties and methods that it belongs to it. Is this possible in Swift? if yes, how to go about this? I could not find any solution (perhaps because there is a term for that style? which I have no clue about) thoughts?