SwiftUI: Index out of range when deleting TextField() but not Text()

Question

The code below throws an index out of range error when deleting TextField() but not when deleting Text().

Here is the full error: Fatal error: Index out of range: file Swift/ContiguousArrayBuffer.swift, line 444

import SwiftUI

struct Information: Identifiable {
    let id: UUID
    var title: String
}

struct ContentView: View {

    @State var infoList = [
        Information(id: UUID(), title: "Word"),
        Information(id: UUID(), title: "Words"),
        Information(id: UUID(), title: "Wording"),
    ]


var body: some View {
    
    Form {
        ForEach(0..<infoList.count, id: \.self){ item in
            Section{
                
                
//                    Text(infoList[item].title) //<-- this doesn't throw error when deleted
                
                    TextField(infoList[item].title, text: $infoList[item].title)
            
            }
        }.onDelete(perform: deleteItem)
    }

}

    private func deleteItem(at indexSet: IndexSet) {
        self.infoList.remove(atOffsets: indexSet)
    }
}

Does this answer your question https://stackoverflow.com/a/58911168/12299030? Also might be helpful https://stackoverflow.com/a/61435489/12299030. — Asperi, Oct 06 '20 at 10:46
The first link seems to work but I am having trouble making it work with Identifiable. In particular getting the index to pass to EditorView. — Brenton Beltrami, Oct 06 '20 at 11:09

score 0 · Answer 1 · answered Oct 06 '20 at 14:28

@Asperi's response about creating a dynamic container was correct. I just had to tweak a bit to make it compatible with Identifiable. Final code below:

import SwiftUI

struct Information: Identifiable {
let id: UUID
var title: String

}

struct ContentView: View {

@State var infoList = [
    Information(id: UUID(), title: "Word"),
    Information(id: UUID(), title: "Words"),
    Information(id: UUID(), title: "Wording"),
]




var body: some View {
    
    Form {
        ForEach(0..<infoList.count, id: \.self){ item in
            
            EditorView(container: self.$infoList, index: item, text: infoList[item].title)
                
            
        }.onDelete(perform: deleteItem)

      
    }

}

private func deleteItem(at indexSet: IndexSet) {
    
    
    
    self.infoList.remove(atOffsets: indexSet)
}
}


struct EditorView : View {
var container: Binding<[Information]>
var index: Int

@State var text: String

var body: some View {
    TextField("", text: self.$text, onCommit: {
        self.container.wrappedValue[self.index] = Information(id: UUID(), title: text)
    })
}
}

SwiftUI: Index out of range when deleting TextField() but not Text()

1 Answers1