I have a simple app in SwiftUI, and I try to delete list items in app , project is working, but still list items not able to delete, I do not know what I did not put in my codes, any idea will be appreciated.
struct MyView: View {
@State private var selectedUsers: MyModel?
var body: some View {
ScrollView(.vertical, showsIndicators: false, content: {
VStack(content: {
ForEach(datas){ data in
MyRowView(data: data)
.contextMenu {
Button(action: {
self.delete(item: data)
}) {
Text("delete")
}
}
.onTapGesture {
selectedUsers = data
}
} .onDelete { (indexSet) in
selectedUsers.remove(atOffsets: indexSet)
}})
})}
private func delete(item data: MyModel) {
if let index = datas.firstIndex(where: { $0.id == data.id }) {
datas.remove(at: index)
}
}}
model:
struct MyModel: Identifiable, Hashable, Codable {
var id = UUID().uuidString
var name: String
}
var datas = [
MyModel(name: "david"),
MyModel(name: "marry"),
]
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I am searching for a long time, how we can use custom emoji in SwiftUI, for a chat app, there is some example on internet but they are not for custom emoji, is it possible in SwiftUI?
I have a simple app in SwiftUI, and I try to delete all list items with context menu , when I click context menu button, I want to remove all items, is it possible?
struct MyView: View {
@State private var selectedUsers: MyModel?
var body: some View {
ScrollView(.vertical, showsIndicators: false, content: {
VStack(content: {
ForEach(datas){ data in
MyRowView(data: data)
.contextMenu {
Button(action: {
self.delete(item: data)
}) {
Text("delete")
}
}
.onTapGesture {
selectedUsers = data
}
} .onDelete { (indexSet) in
selectedUsers.remove(atOffsets: indexSet)
}})
})}
private func delete(item data: MyModel) {
if let index = datas.firstIndex(where: { $0.id == data.id }) {
datas.remove(at: index)
}
}}
model:
struct MyModel: Identifiable, Hashable, Codable {
var id = UUID().uuidString
var name: String
}
var datas = [
MyModel(name: "david"),
MyModel(name: "marry"),
]
I have list items in SwiftUI, and when I delete list items I want to delete after alert menu, like
"do want to delete your list items, ""yes" or "no"
is it possible?
struct MyView: View {
@State private var selectedUsers: MyModel?
var body: some View {
ScrollView(.vertical, showsIndicators: false, content: {
VStack(content: {
ForEach(datas){ data in
MyRowView(data: data)
.contextMenu {
Button(action: {
self.delete(item: data)
}) {
Text("delete")
}
}
.onTapGesture {
selectedUsers = data
}
} .onDelete { (indexSet) in
self.datas.remove(atOffsets: indexSet)
}})
})}
private func delete(item data: MyModel) {
if let index = datas.firstIndex(where: { $0.id == data.id }) {
datas.remove(at: index)
}
}}
I have list items in SwiftUI, and when I delete list items, but when I click the delete button, it delete item randomly, I want to delete seleted item, where is the mistake?
struct MyView: View {
@State private var selectedUsers: MyModel?
@State var datas: [MyModel]
@State private var confirmDelete = false
var body: some View {
ScrollView(.vertical, showsIndicators: false, content: {
VStack(content: {
ForEach(datas){ data in
MyRowView(data: data)
.contextMenu {
Button(action: {
self.delete(item: data)
}) {
Text("delete")
}
}
.onTapGesture {
selectedUsers = data
}
.confirmationDialog( "Are you sure ?",
isPresented: $confirmDelete,
titleVisibility: .visible
){
Button(role: .destructive) {
self.delete(item: data)
} label: {
Text("ok")
}
Button(role: .cancel) {
} label: {
Text("cancel")
}
}
} .onDelete { (indexSet) in
self.datas.remove(atOffsets: indexSet)
}})
})}
private func delete(item data: MyModel) {
if let index = datas.firstIndex(where: { $0.id == data.id }) {
datas.remove(at: index)
}
}}
I am trying to use confirmationDialog to delete an item in a List.
But what happens is that the wrong item gets deleted. Why?
Here is my code:
struct MyView: View {
@State private var selectedUsers: MyModel?
@State var datas: [MyModel]
@State private var confirmDelete = false
var body: some View {
ScrollView(.vertical, showsIndicators: false, content:
{
VStack(content: {
ForEach(datas){ data in
MyRowView(data: data)
.contextMenu {
Button(action: {
self.delete(item: data)
}) {
Text("delete")
}
}
.onTapGesture {
selectedUsers = data
}
.alert(isPresented: $confirmDelete) {
Alert(title: Text("title"),
message: Text("message"),
primaryButton: .destructive(Text("Delete")) {
self.delete(item: data)
},
secondaryButton: .cancel())
}
} .onDelete { (indexSet) in
self.datas.remove(atOffsets: indexSet)
}})
})}
private func delete(item data: MyModel) {
if let index = datas.firstIndex(where: { $0.id == data.id }) {
datas.remove(at: index)
}
}}
I have multiple alert dialog in project, just one of them is work, but I am still do not know why I am not use second one, so how we can use multiple .alert dialog in SwiftUI?
struct MyView: View {
@State private var selectedUsers: MyModel?
@State var datas: [MyModel]
@State private var deleteRow = false
@State private var deleteRows = false
var body: some View {
ScrollView(.vertical, showsIndicators: false, content:
{
VStack(content: {
ForEach(datas){ data in
MyRowView(data: data)
.contextMenu {
Button(action: {
deleteRow = true
}) {
Text("delete")
}
Button(action: {
deleteRows = true
}) {
Text("delete")
}
}
.onTapGesture {
selectedUsers = data
}
.alert(isPresented: $deleteRow) {
Alert(title: Text("title"),
message: Text("message"),
primaryButton: .destructive(Text("Delete")) {
self.delete(item: data)
},
secondaryButton: .cancel())
}
.alert(isPresented: $deleteRows) {
Alert(title: Text("title"),
message: Text("message"),
primaryButton: .destructive(Text("Delete")) {
self.datas.removeAll()
},
secondaryButton: .cancel())
}
} .onDelete { (indexSet) in
self.datas.remove(atOffsets: indexSet)
}})
})}
private func delete(item data: MyModel) {
if let index = datas.firstIndex(where: { $0.id == data.id }) {
datas.remove(at: index)
}
}}
I have small SwiftUI app, and it throw an error like "Cannot find 'state' in scope" for this line
Register(state: state)
I guess it must be like that, but it is throw an error, I do not know what I missed? Any idea?
struct Register: View {
@ObservedObject private var viewModel: RegisterViewModel
init(state: AppState) {
self.viewModel =RegisterViewModel(authAPI: AuthService(), state: state)
}
var body: some View {
}
}
struct Register_Previews: PreviewProvider {
@ObservedObject private var viewModel:
RegisterViewModel
@State var pushActive = false
init(state: AppState) {
self.viewModel = RegisterViewModel(authAPI: AuthService(), state: state)
}
static var previews: some View {
Register(state: state)
}
}
class RegisterViewModel: ObservableObject {
@Published var state: AppState
init(authAPI: AuthAPI, state: AppState) {
self.authAPI = authAPI
self.state = state
}
}
}
I have SwiftUI project, and I want to use register for my project, it throw an error as a "Function is unused" for signUp in this line of code:
Button {
self.viewModel.signUp
} label: {
Text("Register")
.padding()
}
I do not know why?
struct Register: View {
@ObservedObject private var viewModel: RegisterViewModel
@State var pushActive = false
init(state: AppState) {
self.viewModel = RegisterViewModel(authAPI: AuthService(), state: state)
}
var body: some View {
Button {
self.viewModel.signUp
} label: {
Text("Register")
.padding()
}
}
viewmodel:
class RegisterViewModel: ObservableObject {
@Published var email: String = ""
@Published var password: String = ""
@Published var state: AppState
private var cancellableBag = Set<AnyCancellable>()
private let authAPI: AuthAPI
init(authAPI: AuthAPI, state: AppState) {
self.authAPI = authAPI
self.state = state
}
func signUp() {
authAPI.signUp(email: email, password: password)
.receive(on: RunLoop.main)
.map(resultMapper)
.store(in: &cancellableBag)
}
}
}
I am use firebase for my SwiftUI App, and I want to register with mail, but when I typing my mail it is throw an error like
Oops! Something went wrong. Please try again.
I do not know why? here is my code:
StatusViewModel:
class StatusViewModel: Identifiable, ObservableObject {
var title: String
var message: String
init(title: String = "", message: String = "") {
self.title = title
self.message = message
}
static var signUpSuccessStatus: StatusViewModel {
return StatusViewModel(title: "Successful", message: "Your account has been created successfully")
}
static var logInSuccessStatus: StatusViewModel {
return StatusViewModel(title: "Successful", message: "Your account has been logged in successfully")
}
static var errorStatus: StatusViewModel {
return StatusViewModel(title: "Error", message: "Oops! Something went wrong. Please try again.")
}
}
RegisterViewModel:
import Foundation
import Combine
class RegisterViewModel: ObservableObject {
@Published var email: String = ""
@Published var password: String = ""
@Published var statusViewModel: StatusViewModel?
@Published var state: AppState
private var cancellableBag = Set<AnyCancellable>()
private let authAPI: AuthAPI
init(authAPI: AuthAPI, state: AppState) {
self.authAPI = authAPI
self.state = state
}
func signUp() {
authAPI.signUp(email: email, password: password)
.receive(on: RunLoop.main)
.map(resultMapper)
.replaceError(with: StatusViewModel.errorStatus)
.assign(to: \.statusViewModel, on: self)
.store(in: &cancellableBag)
}
}
extension RegisterViewModel {
private func resultMapper(with user: User?) -> StatusViewModel {
if user != nil {
state.currentUser = user
return StatusViewModel.signUpSuccessStatus
} else {
return StatusViewModel.errorStatus
}
}
}
struct Register: View {
@ObservedObject private var viewModel: RegisterViewModel
@State var pushActive = false
init(state: AppState) {
self.viewModel = RegisterViewModel(authAPI: AuthService(), state: state)
}
var body: some View {
NavigationLink(destination: HomeView(state: viewModel.state),
isActive: self.$pushActive) {
Button {
self.viewModel.signUp()
} label: {
Text("Register")
.padding()
}
}
}
}
I have multiple register screen in swiftUI, I did not understand how I will connect first register screen to second register screen, normally first register screen connect to main screen, but I want to connect first register screen to second register screen, and connect second register screen to main screen, how can I do it, any idea?
StatusViewModel:
class StatusViewModel: Identifiable, ObservableObject {
var title: String
var message: String
init(title: String = "", message: String = "") {
self.title = title
self.message = message
}
static var signUpSuccessStatus: StatusViewModel {
return StatusViewModel(title: "Successful", message: "Your account has been created successfully")
}
static var logInSuccessStatus: StatusViewModel {
return StatusViewModel(title: "Successful", message: "Your account has been logged in successfully")
}
static var errorStatus: StatusViewModel {
return StatusViewModel(title: "Error", message: "Oops! Something went wrong. Please try again.")
}
}
RegisterViewModel:
import Foundation
import Combine
class RegisterViewModel: ObservableObject {
@Published var email: String = ""
@Published var password: String = ""
@Published var statusViewModel: StatusViewModel?
@Published var state: AppState
private var cancellableBag = Set<AnyCancellable>()
private let authAPI: AuthAPI
init(authAPI: AuthAPI, state: AppState) {
self.authAPI = authAPI
self.state = state
}
func signUp() {
authAPI.signUp(email: email, password: password)
.receive(on: RunLoop.main)
.map(resultMapper)
.replaceError(with: StatusViewModel.errorStatus)
.assign(to: \.statusViewModel, on: self)
.store(in: &cancellableBag)
}
}
extension RegisterViewModel {
private func resultMapper(with user: User?) -> StatusViewModel {
if user != nil {
state.currentUser = user
return StatusViewModel.signUpSuccessStatus
} else {
return StatusViewModel.errorStatus
}
}
}
first register screen:
struct Register: View {
@ObservedObject private var viewModel: RegisterViewModel
@State var pushActive = false
init(state: AppState) {
self.viewModel = RegisterViewModel(authAPI: AuthService(), state: state)
}
var body: some View {
VStack(){
TextField("Email Address",text:$viewModel.email)
.autocapitalization(.none)
.padding()
HStack(spacing: 15){
TextField("Password", text: $viewModel.password)
.autocapitalization(.none)
}
NavigationLink(destination: HomeView(state: viewModel.state),
isActive: self.$pushActive) {
Button {
self.viewModel.signUp()
} label: {
Text("Register")
.padding()
}
}
}
}
second register screen:
struct SecondRegister: View {
var body: some View {
GeometryReader { geometry in
ZStack{
VStack(alignment: .center, spacing: 3){
TextField("First Name",text:self.$first_name)
.autocapitalization(.none)
.padding()
TextField("Last Name", text: self.$last_name)
.autocapitalization(.none)
.padding()
}
Button {
} label: {
Text("Next")
.padding()
}
}
}.padding()
}.padding(.top,60)
}
}
I have simple app in SwiftUI, when I use @Binding var show : Bool for second register screen,
it is throw an error for this line of code
init(state: AppState) {
self.viewModel = RegisterViewModel(authAPI: AuthService(), state: state)
}
as a "Return from initializer without initializing all stored properties" any idea?
first screen:
import SwiftUI
struct RegisterFirstScreen: View {
@Binding var show : Bool
init(state: AppState) {
self.viewModel = RegisterViewModel(authAPI: AuthService(), state: state)
}
var body: some View {
NavigationLink(destination: RegisterSecondScreen(state: viewModel.state, show: $show),
isActive: self.$pushActive) {
Button {
viewModel.signUp()
} label: {
Text("Register Now")
.padding()
}
}
}
second screen:
struct RegisterSecondScreen: View {
@ObservedObject var state: AppState
@Binding var show : Bool
var body: some View {
Text("Next main screen")
}}
I have register screen and I am not able to register info to firebase, I put user info on simulator, but it just hold on on screen, and no any change on firebase, any idea? where I missed?
import SwiftUI
import Firebase
struct Register: View {
@State var name = ""
@State var about = ""
@Binding var show : Bool
var body: some View {
VStack(alignment: .center, spacing: 3){
TextField("Name",text:self.$name)
.padding()
TextField(" about", text: self.$about)
.padding()
if self.loading{
HStack{
Spacer()
Indicator()
Spacer()
}
}
else{
Button {
if self.name != "" && self.about != "" {
self.loading.toggle()
CreateUser(name: self.name, about: self.about) { (status) in
if status{
self.show.toggle()
}
}
}
else{
self.alert.toggle()
}
} label: {
Text("Next")
.padding()
}
}
}
import Foundation
import Firebase
func CreateUser(name: String,about : String, completion : @escaping (Bool)-> Void){
let db = Firestore.firestore()
let storage = Storage.storage().reference()
let uid = Auth.auth().currentUser?.uid
db.collection("users").document(uid!).setData(["name":name,"about":about, "uid":uid!]) { (err) in
if err != nil{
print((err?.localizedDescription)!)
return
}
completion(true)
UserDefaults.standard.set(true, forKey: "status")
UserDefaults.standard.set(name, forKey: "UserName")
NotificationCenter.default.post(name: NSNotification.Name("statusChange"), object: nil)
}
}
I have small problem in my project, it throw an error as a
Extra arguments at positions #3, #4
for
Auth.auth().signIn()
line, I do not know what I missed?
func login(email: String, password: String, name: String, surname: String) -> Future<User?, Never> {
return Future<User?, Never> { promise in
Auth.auth().signIn(withEmail: email, password: password, name: name, surname: surname) {(authResult, _) in
guard let id = authResult?.user.providerID,
let email = authResult?.user.email else {
promise(.success(nil))
return
}
let user = User(id: id, email: email, name:name, surname:surname)
promise(.success(user))
}
}
}
model:
import Foundation
struct User {
let id: String
let email: String
let name: String
let surname: String
}
I have register screen in SwiftUI, and I want to use two screen for register users, one view have mail and password, and other view have name surname and occupation, but I am still do not understand how I will connect both register view, any idea?
RegistrationViewModel:
enum RegistrationState {
case successfullyRegistered
case failed(error: Error)
case na
}
protocol RegistrationViewModel {
func create()
var service: RegistrationService { get }
var state: RegistrationState { get }
var hasError: Bool { get }
var newUser: RegistrationCredentials { get }
init(service: RegistrationService)
}
final class RegistrationViewModelImpl: ObservableObject, RegistrationViewModel {
let service: RegistrationService
@Published var state: RegistrationState = .na
@Published var newUser = RegistrationCredentials(email: "",
password: "",
firstName: "",
lastName: "",
occupation: "")
@Published var hasError: Bool = false
private var subscriptions = Set<AnyCancellable>()
init(service: RegistrationService) {
self.service = service
setupErrorSubscription()
}
func create() {
service
.register(with: newUser)
.sink { [weak self] res in
switch res {
case .failure(let error):
self?.state = .failed(error: error)
default: break
}
} receiveValue: { [weak self] in
self?.state = .successfullyRegistered
}
.store(in: &subscriptions)}}
private extension RegistrationViewModelImpl {
func setupErrorSubscription() {
$state
.map { state -> Bool in
switch state {
case .successfullyRegistered,
.na:
return false
case .failed:
return true}}
.assign(to: &$hasError)}}
firstscreen:
struct RegisterView: View {
@StateObject private var viewModel = RegistrationViewModelImpl(
service: RegistrationServiceImpl()
)
var body: some View {
NavigationView {
VStack(spacing: 32) {
VStack(spacing: 16) {
InputTextFieldView(text: $viewModel.newUser.email,
placeholder: "Email",
keyboardType: .emailAddress,
systemImage: "envelope")
InputPasswordView(password: $viewModel.newUser.password,
placeholder: "Password",
systemImage: "lock")
}
ButtonView(title: "Next") {
viewModel.create()
}
}
.padding(.horizontal, 15)
.alert(isPresented: $viewModel.hasError,
content: {
if case .failed(let error) = viewModel.state {
return Alert(
title: Text("Error"),
message: Text(error.localizedDescription))
} else {
return Alert(
title: Text("Error"),
message: Text("Something went wrong"))
}})}}}
secondscreen:
import SwiftUI
struct SecondRegisterView: View {
@StateObject private var viewModel = RegistrationViewModelImpl(
service: RegistrationServiceImpl()
)
var body: some View {
NavigationView {
VStack(spacing: 32) {
VStack(spacing: 16) {
InputTextFieldView(text: $viewModel.newUser.firstName,
placeholder: "First Name",
keyboardType: .namePhonePad,
systemImage: nil)
InputTextFieldView(text: $viewModel.newUser.lastName,
placeholder: "Last Name",
keyboardType: .namePhonePad,
systemImage: nil)
InputTextFieldView(text: $viewModel.newUser.occupation,
placeholder: "Occupation",
keyboardType: .namePhonePad,
systemImage: nil)
}
ButtonView(title: "Sign up") {
viewModel.create()
}
}
.padding(.horizontal, 15)
.navigationTitle("Register")
.applyClose()
.alert(isPresented: $viewModel.hasError,
content: {
if case .failed(let error) = viewModel.state {
return Alert(
title: Text("Error"),
message: Text(error.localizedDescription))
} else {
return Alert(
title: Text("Error"),
message: Text("Something went wrong"))
}
})
}
}
}