How to Delete List Rows from SwiftUI

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SwiftUI makes it easy to delete rows from a list using the onDelete() modifier. In this blog post, we’ll learn how to use the onDelete() modifier to allow the user to delete items from a list.

To get started, let’s create a simple list of strings that we’ll use as our data source:

@State var data = ["Item 1", "Item 2", "Item 3", "Item 4"]

Next, we’ll create a List and bind it to our data source using the ForEach view:

List {
    ForEach(data, id: \.self) { item in
        Text(item)
    }
}

This will create a simple list of items that can’t be deleted by the user. To enable deleting, we’ll need to add the onDelete() modifier to our ForEach view:

List {
    ForEach(data, id: \.self, content: { item in
        Text(item)
    }).onDelete { (indexSet: IndexSet) in
        data.remove(atOffsets: indexSet)
    }
}

The onDelete() modifier takes a closure that is called whenever the user tries to delete an item. The closure receives an IndexSet that contains the indices of the items being deleted.

To actually delete the items, we’ll need to update our data source and apply the changes to the list. One way to do this is to use the remove(atOffsets:) method of the MutableCollection protocol:

// Full code
struct ContentView: View {
    @State var data = ["Item 1", "Item 2", "Item 3", "Item 4"]
    var body: some View {
        VStack {
            List {
                ForEach(data, id: \.self, content: { item in
                    Text(item)
                }).onDelete { (indexSet: IndexSet) in
                    data.remove(atOffsets: indexSet)
                }
            }
        }
        .padding()
    }
}

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