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Advanced Dismissing Views

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I've referenced this tutorial for using a button action to dismiss sheets https://www.hackingwithswift.com/quick-start/swiftui/how-to-make-a-view-dismiss-itself

but I'm having trouble extending the idea to my usecase below:

I return a success from the server and switch the published property passwordChangeSuccessDismissSheet to true.

    @Published var passwordChangeSuccessDismissSheet = false

    @Published var passwordChangeFailedAfter = false

    func changeSlpUserPassword() {
        guard !isSending else {
            return
        }
        isSending = true
        let slpChangePassword = UserSLPChangePasswordRequest(old_Password: oldPassword, new_Password: newPassword)
        UserAccountWebService().changeSlpUserPassword(userSlpPass: slpChangePassword) { result in
            switch result {
            case .success():
                print("passwordChanged")
                DispatchQueue.main.async {
                    self.passwordChangeSuccessDismissSheet = true
                }
            case .failure(let error):
                print(error)
                DispatchQueue.main.async {
                    self.isSending = false
                    self.passwordChangeFailedAfter = true
                }
            }
        }
    }

As far as the view goes, I have the parent view with a button to bring up the sheet using the typical binding and modifier:

                    Button(action: { passwordChangeTapped = true }, label: {
                        Text("Change password")
                            .font(.custom("Poppins", size: 22))
                            .fontWeight(.regular)
                            .foregroundColor(Color(#colorLiteral(red: 0.9803921569, green: 0.6784313725, blue: 0.2823529412, alpha: 1)))
                    })

Inside of the sheet, I only use a navigation bar item for a "Cancel" button which will dismiss the sheet:

            .navigationBarItems(trailing: Button(action: {
                showSheetPresented.toggle()
            }, label: {
                Text("Cancel")
            }))

The goal is for the sheet view to be listening for the change in my @Published property so that it will dismiss once the server returns the successful response.

Nothing seems to be working.

Any help would be great!

2      

You have not shown how you have defined the class that has the @Published parameters, so I have taken Paul's example code and modified it to be for a class instead. Hopefully this will give you some ideas of how to change your code.

class DisplayThis: ObservableObject {
    @Published var displayIt = false
}

struct DismissingView1: View {
    @Environment(\.presentationMode) var presentationMode
    @StateObject var displayThis: DisplayThis

    private func changeDisplay() {
        if !displayThis.displayIt {
            presentationMode.wrappedValue.dismiss()
        }
    }

    var body: some View {
        Button("Dismiss Me") {
            displayThis.displayIt = false
        }
    }
}

struct ContentView: View {
    @StateObject var displayThis: DisplayThis

    var body: some View {
        Button("Show Detail") {
            displayThis.displayIt = true
        }
        .sheet(isPresented: $displayThis.displayIt) {
            DismissingView1(displayThis: displayThis)
        }
    }
}

If you did use this idea in the simplest program where there is just a ContentView, you would need to change the app swift file to prevent a compliation error.

from

ContentView()

to

ContentView(displayThis: .init())

2      

Hi @Greenamberred I'm not sure I understand what you mean about the class with the @Published parameter. The only class involved is my View Controller with the @Published var passwordChangeSuccessDismissSheet = false block.

I've given this a shot and still am not finding the right results. If I understand, your private function which runs the presentationMode.wrappedValue.dismiss() should be in my view somewhere and be listening to the @Published property that lives in my View Controller, as stated above.

Let me know if I can share some more context or code on this because maybe my navigation and Sheet hirearchy is causing some of the problems?

Thanks for the help!

2      

Yes, seeing the code for the view would be useful to try help you more specifically.

Somewhere you should be using the equivalent of

@Environment(\.presentationMode) var presentationMode
…
presentationMode.wrappedValue.dismiss()

or

.sheet(isPresented: $displayThis.displayIt) {  …

but using your parameters

passwordChangeSuccessDismissSheet and showSheetPresented.

2      

I'll just drop the entire view for you. This is a user account view, with a sheet to change their password. As I mentioned, the goal here is to dismiss the "change password sheet" once the @Published property switches to True from my class.

I think ultimately what doesn't make sense is how I "listen" to the @Published property while at the same time bind to the local @State properties in my view that manage the sheet as well.

Ignore all the Account Image stuff.

struct SLPAccountProfileView: View {

    let slpAccountProfilePicVM = SLPAccountProfilePicture()

    @StateObject var slpAccountVM = SLPChangeAccountPassword()

    private let userAccountProperties = SLPDataManager.shared.returnUsersProfileDetails()

    @State private var passwordChangeTapped = false

    @State var selectedImage: UIImage?

    @State var profileImage: Image?

    @State var imagePickerPresented = false

    var body: some View {
        NavigationView {
            VStack {
                if profileImage == nil {
                    Button(action: { imagePickerPresented = true }, label: {
                        Image("ProfilePlaceholder")
                            .clipShape(Circle())
                            .frame(width: 72, height: 72)
                    })

                        .sheet(isPresented: $imagePickerPresented, onDismiss: loadImageFirstTime, content: {
                            ImagePicker(image: $selectedImage)

                        })
                } else if let image = profileImage {
                    VStack {
                        Button(action: { imagePickerPresented = true }, label: {
                            image
                                .resizable()
                                .scaledToFill()
                                .clipped()
                                .clipShape(Circle())
                                .frame(width: 72, height: 72)
                        })

                            .sheet(isPresented: $imagePickerPresented, onDismiss: loadNewImage, content: {
                                ImagePicker(image: $selectedImage)
                            })
                    }
                }
                VStack {
                    List {
                        Section(header: Text("Name")){

                            SLPAccountListItems(item: "\(userAccountProperties?.first_name ?? "empty")" + " \(userAccountProperties?.last_name ?? "empty")")
                        }
                        .font(.custom("Poppins", size: 12))
                        .foregroundColor(Color(#colorLiteral(red: 0.9803921569, green: 0.6784313725, blue: 0.2823529412, alpha: 1)))

                        Section(header: Text("Email")){

                            SLPAccountListItems(item: userAccountProperties?.email ?? "empty")

                        }
                        .font(.custom("Poppins", size: 12))
                        .foregroundColor(Color(#colorLiteral(red: 0.9803921569, green: 0.6784313725, blue: 0.2823529412, alpha: 1)))

                        Section(header: Text("Phone Number")) {

                            SLPAccountListItems(item: userAccountProperties?.mobile_number ?? "empty")

                        }
                        .font(.custom("Poppins", size: 12))
                        .foregroundColor(Color(#colorLiteral(red: 0.9803921569, green: 0.6784313725, blue: 0.2823529412, alpha: 1)))

                        Section(header: Text("Timezone")) {

                            SLPAccountListItems(item: userAccountProperties?.timezone ?? "empty")

                        }
                        .font(.custom("Poppins", size: 12))
                        .foregroundColor(Color(#colorLiteral(red: 0.9803921569, green: 0.6784313725, blue: 0.2823529412, alpha: 1)))
                    }
                    .listStyle(GroupedListStyle())

                    Button(action: { SLPDataManager.shared.logOut() }, label: {
                        Text("Log Out")
                            .font(.custom("Poppins", size: 18))
                            .fontWeight(.medium)
                            .foregroundColor(Color(#colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)))
                            .frame(width: 200, height: 50)
                            .background(Color(#colorLiteral(red: 0.1521442533, green: 0.4429811835, blue: 0.6690705419, alpha: 1)))
                            .cornerRadius(10)
                            .overlay(
                                RoundedRectangle(cornerRadius: 8)
                                    .stroke(Color(#colorLiteral(red: 0.9803921569, green: 0.6784313725, blue: 0.2823529412, alpha: 1)), lineWidth: 1.3)
                            )

                    })
                        .padding(2)
                    Button(action: { passwordChangeTapped = true }, label: {
                        Text("Change password")
                            .font(.custom("Poppins", size: 22))
                            .fontWeight(.regular)
                            .foregroundColor(Color(#colorLiteral(red: 0.9803921569, green: 0.6784313725, blue: 0.2823529412, alpha: 1)))
                    })
                        .padding(.bottom, 60)
                        .padding(.top, 10)
                }
            }
            .navigationViewStyle(StackNavigationViewStyle())
            .navigationBarHidden(true)
            .sheet(isPresented: $passwordChangeTapped, content: {
                PasswordChangeView(showSheetPresented: $passwordChangeTapped)
            })
        }
    }
}

struct PasswordChangeView: View {

    @StateObject var slpAccountVM = SLPChangeAccountPassword()

    @Binding var showSheetPresented: Bool

    var body: some View {

        NavigationView {
            VStack {
                Text("Change password")
                    .headline1TextStyle()
                    .padding(.bottom, 20)

                VStack {
                    HStack {
                        Image(systemName: "number")
                            .font(.system(size: 27, weight: .ultraLight))
                            .foregroundColor(slpAccountVM.isOldPasswordValid() ? .green : .black)

                        SecureField("Current password", text: $slpAccountVM.oldPassword)
                            .modifier(TextFieldStyle())
                    }
                    .padding(.bottom, 10)

                    HStack {
                        Image(systemName: "number")
                            .font(.system(size: 27, weight: .ultraLight))
                            .foregroundColor(slpAccountVM.isNewPasswordValid() ? .green : .black)

                        SecureField("New password", text: $slpAccountVM.newPassword)
                            .modifier(TextFieldStyle())
                    }
                    .padding(.bottom, 10)

//                    Text("You will be logged out after changing your password")
//                        .font(.custom("Poppins", size: 14))
//                        .fontWeight(.medium)
//                        .foregroundColor(.gray)
//                        .frame(maxWidth: 300, alignment: .center)
                }
                Spacer()

                if slpAccountVM.passwordFormVerified {
                    Button(action: { slpAccountVM.changeSlpUserPassword() }, label: {

                        ActivityIndicator(isAnimating: slpAccountVM.isSending)

                        Text(slpAccountVM.isSending ? "Submitting..." : "Submit")
                            .font(.custom("Poppins", size: 18))
                            .fontWeight(.medium)
                            .foregroundColor(Color(#colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)))
                            .frame(width: 200, height: 50)
                            .background(Color(#colorLiteral(red: 0.1521442533, green: 0.4429811835, blue: 0.6690705419, alpha: 1)))
                            .cornerRadius(10)
                            .overlay(
                                RoundedRectangle(cornerRadius: 8)
                                    .stroke(Color(#colorLiteral(red: 0.9803921569, green: 0.6784313725, blue: 0.2823529412, alpha: 1)), lineWidth: 1.3)
                            )

                    })
                }
                if slpAccountVM.passwordChangeFailedAfter == true {
                    Text("Something went wrong while trying to change your password. Please contact support if you continue to experience problems")
                        .font(.custom("Poppins", size: 14))
                        .fontWeight(.medium)
                        .foregroundColor(.red)
                        .frame(maxWidth: 300, alignment: .center)
                }

            }
            .navigationBarItems(trailing: Button(action: {
                showSheetPresented.toggle()
            }, label: {
                Text("Cancel")
            }))
        }

    }

}

2      

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