How to make a TextField or TextEditor have default focus

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How to make a TextField or TextEditor have default focus 관련

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How to make a TextField or TextEditor have default focus | SwiftUI by Example

How to make a TextField or TextEditor have default focus

Updated for Xcode 15

SwiftUI on macOS provides a defaultFocus() modifier that lets us activate one view as the first responder to user input as soon as a view is shown. Sadly it doesn't exist on iOS, but we can work around that using onAppear().

First, here's the code with the workaround in place, suitable for use on iOS:

struct ContentView: View {
    enum FocusedField {
        case firstName, lastName
    }

    @State private var firstName = ""
    @State private var lastName = ""
    @FocusState private var focusedField: FocusedField?

    var body: some View {
        Form {
            TextField("First name", text: $firstName)
                .focused($focusedField, equals: .firstName)

            TextField("Last name", text: $lastName)
                .focused($focusedField, equals: .lastName)
        }
        .onAppear {
            focusedField = .firstName
        }
    }
}

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And here's the code using defaultFocus(), suitable for use on macOS:

struct ContentView: View {
    enum FocusedField {
        case firstName, lastName
    }

    @State private var firstName = ""
    @State private var lastName = ""
    @FocusState private var focusedField: FocusedField?

    var body: some View {
        Form {
            TextField("First name", text: $firstName)
                .focused($focusedField, equals: .firstName)

            TextField("Last name", text: $lastName)
                .focused($focusedField, equals: .lastName)
        }
        .defaultFocus($focusedField, .firstName)
    }
}