Initializer

init(value:step:label:onEditingChanged:)

Creates a stepper configured to increment or decrement a binding to a value using a step value you provide.

Declaration 宣言 

init<V>(value: Binding<V>, step: V.Stride = 1, label: () -> Label, onEditingChanged: @escaping (Bool) -> Void = { _ in }) where V : Strideable
Available when Label conforms to View. LabelがViewに準拠する場合に利用可能です。

Parameters パラメータ

value

The Binding to a value that you provide.

step

The amount to increment or decrement value each time the user clicks or taps the stepper’s increment or decrement buttons. Defaults to 1.

label

A view describing the purpose of this stepper.

onEditingChanged

A closure that’s called when editing begins and ends. For example, on iOS, the user may touch and hold the increment or decrement buttons on a stepper which causes the execution of the onEditingChanged closure at the start and end of the gesture.

Discussion 議論

Use this initializer to create a stepper that increments or decrements a bound value by a specific amount each time the user clicks or taps the stepper’s increment or decrement buttons.

In the example below, a stepper increments or decrements value by the step value of 5 at each click or tap of the control’s increment or decrement button:


struct StepperView: View {
    @State private var value = 1
    let step = 5
    var body: some View {
        Stepper(value: $value,
                step: step) {
            Text("Current value: \(value), step: \(step)")
        }
            .padding(10)
    }
}

A view displaying a stepper that increments or decrements a value by

See Also 参照

ステッパーを作成する

init<V>(LocalizedStringKey, value: Binding<V>, step: V.Stride, onEditingChanged: (Bool) -> Void)
Creates a stepper with a title key and configured to increment and decrement a binding to a value and step amount you provide.
Available when Label is Text. LabelがTextである時に利用可能です。
init<S, V>(S, value: Binding<V>, step: V.Stride, onEditingChanged: (Bool) -> Void)
Creates a stepper with a title and configured to increment and decrement a binding to a value and step amount you provide.
Available when Label is Text. LabelがTextである時に利用可能です。