thank you for your answer,I have to show the data from my db,I get the data shown on List,when I get the data shown on pickerI get the the error:Thread 1: Fatal error: Index out of rangeit seems like i get nothing from users[]do you know how to modify it?I will really appreciate it if you can show me how to fill a foreach in picker to show all the data from users[]here is my code:ContentView.swift:import SwiftUI
struct SwiftUIView_Main: View {
var body: some View {
ContentViewpicker()
// ListView()
}
}
struct ContentViewpicker: View {
var body: some View {
let users = UserList().users
return Picker(selection: /*@START_MENU_TOKEN@*/.constant(1)/*@END_MENU_TOKEN@*/, label: /*@START_MENU_TOKEN@*/Text("Picker")/*@END_MENU_TOKEN@*/) {
Text(users[0].name).tag(1)
}
}
}
struct ListView: View {
@ObservedObject var store = UserList()
var body: some View {
List (store.users,id: \.id) { (user) in
UserRow(user: user)
}
}
}
struct UserRow: View {
var user: User
var body: some View {
HStack {
Text(String(user.id))
Text(user.name)
}
}
}
struct SwiftUIView_Main_Previews: PreviewProvider {
static var previews: some View {
SwiftUIView_Main().previewLayout(.fixed(width: 1194, height: 834))
}
}UserList.swift:import Foundation
import Combine
class UserList: ObservableObject {
@Published var users: [User] = []
init() {
load()
}
func load() {
let url = URL(string: "http://localhost:3000/user")!
URLSession.shared.dataTask(with: url) { data, response, error in
DispatchQueue.main.async {
self.users = try! JSONDecoder().decode([User].self, from: data!)
}
}.resume()
}
}
//struct User: Decodable, Identifiable {
struct User: Decodable {
var id: Int
var name: String
}
yw18
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thank you for your code ,it worked!I want to ask another question: I transfered the view from the FirstView to SecondView, from SecondView to ThirdView.How to transferthe view from ThirdView to FirstView?here is my code:import SwiftUI
struct ContentView: View {
@State var showSecondView:Bool = false
var body: some View {
ZStack{
Button(action: {
self.showSecondView.toggle()
}) {
Text("showSecondView")
}
if self.showSecondView {
SecondView(showSecondView: self.$showSecondView)
.frame(maxWidth: .infinity, maxHeight: .infinity)
.background(Color.red)
.animation(.easeInOut)
.transition(.move(edge: .bottom))
}
}
}
}
struct SecondView: View {
@Binding var showSecondView:Bool
@State var showThirdView:Bool = false
var body: some View {
ZStack{
Button(action: {
self.showThirdView.toggle()
}) {
Text("showThirdView")
}
if self.showThirdView {
ThirdView(showThirdView: self.$showThirdView)
.frame(maxWidth: .infinity, maxHeight: .infinity)
.background(Color.yellow)
.animation(.easeInOut)
.transition(.move(edge: .bottom))
}
}
}
}
struct ThirdView: View {
@Binding var showThirdView:Bool
var body: some View {
ZStack{
Button(action: {
}) {
Text("showFirstView")
}
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}