TextField FocusState Demo for iOS 15 SwiftUI

TextFieldFocus.swift

//
//  Focus State Example
//
//  Created by Michael Robert Ellis on 12/7/21.
//

import SwiftUI

struct MyObject: Identifiable, Equatable {
    var id: String
    public var value: String
    init(name: String, value: String) {
        self.id = name
        self.value = value
    }
}

struct ContentView: View {

    @State var myObjects: [MyObject] = [
        MyObject(name: "aa", value: "1"),
        MyObject(name: "bb", value: "2"),
        MyObject(name: "cc", value: "3"),
        MyObject(name: "dd", value: "4")
    ]
    @State var focus: MyObject?

    var body: some View {
        ScrollView(.vertical) {
            VStack {
                Text("Header")
                ForEach(self.myObjects) { obj in
                    Divider()
                    FocusField(displayObject: obj, focus: $focus, nextFocus: {
                        guard let index = self.myObjects.firstIndex(of: $0) else {
                            return
                        }
                        self.focus = myObjects.indices.contains(index + 1) ? myObjects[index + 1] : nil
                    })
                }
                Divider()
                Text("Footer")
            }
        }
    }
}

struct FocusField: View {

    @State var displayObject: MyObject
    @FocusState var isFocused: Bool
    @Binding var focus: MyObject?
    var nextFocus: (MyObject) -> Void

    var body: some View {
        TextField("Test", text: $displayObject.value)
            .onChange(of: focus, perform: { newValue in
                self.isFocused = newValue == displayObject
            })
            .focused(self.$isFocused)
            .submitLabel(.next)
            .onSubmit {
                self.nextFocus(displayObject)
            }
    }
}

A general purpose solution to this is to use a ViewModifier and FocusState that use UUID or Int.

I made this for work a while back and haven’t needed it since, but I’d be happy To include it and your credits in the gist if you want.

…

On Sun, Apr 14, 2024 at 10:48 AM André J ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ A general purpose solution to this is to use a ViewModifier and FocusState that use UUID or Int. — Reply to this email directly, view it on GitHub <https://gist.github.com/michael94ellis/4e877ae9ddecf19b55bbc8b8248ac69f#gistcomment-5022935> or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGEF4OCYJOW5FPKO6RMLWOLY5KJLVBFKMF2HI4TJMJ2XIZLTSKBKK5TBNR2WLJDUOJ2WLJDOMFWWLO3UNBZGKYLEL5YGC4TUNFRWS4DBNZ2F6YLDORUXM2LUPGBKK5TBNR2WLJDHNFZXJJDOMFWWLK3UNBZGKYLEL52HS4DFVRZXKYTKMVRXIX3UPFYGLK2HNFZXIQ3PNVWWK3TUUZ2G64DJMNZZDAVEOR4XAZNEM5UXG5FFOZQWY5LFVEYTCMZUHEZTCOBYU52HE2LHM5SXFJTDOJSWC5DF> . You are receiving this email because you authored the thread. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub> .