NEW: Start my new Ultimate Portfolio App course with a free Hacking with Swift+ trial! >>

Issue with computed property not being updated for showing Sheet

Forums > SwiftUI

@rmwa  

This code has the following issue: The first click on any list item will show the sheet with "This is sheet 0" - meaning that @State property "var example: Int" is not updated as part of the button code (exit live preview and start again, will reproduce the issue)

Any idea what is happening here !?

Code:

import SwiftUI

struct testing2: View {
    @State private var showSheet = false
    @State var example: Int = 0
    var computedItem: String {
        "This is sheet \(example)"
    }

    var body: some View {
        List(0 ..< 5) { item in
            Button("List item: \(item)") {
                self.example = item
                showSheet.toggle()
            }
        }
        .sheet(isPresented: $showSheet, content: {
            Text("\(computedItem)")
        })
    }
}

struct testing2_Previews: PreviewProvider {
    static var previews: some View {
        testing2()
    }
}

   

@State
    private var showSheet = false
    @State
    private var number: Int = 0

    var body: some View {
        List {
            ForEach(0..<5) { item in
                Button(
                    action: {
                        number = item
                        showSheet.toggle()
                    },
                    label: {
                        Text("Item: \(item)")
                    }
                )
            }
        }
        .sheet(
            isPresented: $showSheet) {
            Text("This is sheet: \(number)")
        }
    }

This works as expected.

   

@rmwa  

   

Hacking with Swift is sponsored by RevenueCat

SPONSORED Building and maintaining in-app subscription infrastructure is hard. Luckily there's a better way. With RevenueCat, you can implement subscriptions for your app in hours, not months, so you can get back to building your app.

Try it for free

Sponsor Hacking with Swift and reach the world's largest Swift community!

Reply to this topic…

You need to create an account or log in to reply.

All interactions here are governed by our code of conduct.

 
Unknown user

You are not logged in

Log in or create account
 

Link copied to your pasteboard.