Adding textfield input to array during forEach in SwiftUI

Question

I'm new to Swift / SwiftUI and trying to store the textfield value in an array during a foreach. However I'm encountering a Thread 1: Fatal error: Index out of range message. Should the storing the value happen outside the view(View Model) or can it be done inside a View??

struct OrderView: View {
    
    @Binding var groupsize: Int
    
    @State var nameArray = [String]()
    
    var body: some View {
            
            VStack {          
                
                ForEach(0 ..< groupsize) { index in
                    TextField("Insert name", text: $nameArray[index])}
                
            }
              
    }
}

This is since the number of values I want to store depends on the groupsize variable that comes from the previous view. — mendokusai
– mendokusai, Commented May 10, 2021 at 19:32
Do ForEach(0 ..< groupsize - 1), but as @George_E mentioned, this might not be a good design choice — aheze
– aheze, Commented May 10, 2021 at 19:52

workingdog support Ukraine · Accepted Answer · 2021-05-11 02:35:50Z

3

taking all the good advice of the comments, you could try something like this:

struct OrderView: View {
    @Binding var groupsize: Int
    @State var nameArray = [String]()
    
    var body: some View {
        VStack {
            if nameArray.count > 0 {
                ForEach(0 ..< groupsize) { index in
                    TextField("Insert name", text: $nameArray[index])}
            }
        }.onAppear(perform: {
            if groupsize > 0 {
                nameArray = [String](repeating: "", count: groupsize)
            }
        })
    }
}

answered May 11, 2021 at 2:35

workingdog support Ukraine

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