Initializer

init(_:value:step:onEditingChanged:)

Creates a stepper with a title and configured to increment and decrement a binding to a value and step amount you provide.

Declaration 宣言 

init<S, V>(_ title: S, value: Binding<V>, step: V.Stride = 1, onEditingChanged: @escaping (Bool) -> Void = { _ in }) where S : StringProtocol, V : Strideable
Available when Label is Text. LabelがTextである時に利用可能です。

Parameters パラメータ

title

A string describing the purpose of the stepper.

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 button, respectively. Defaults to 1.

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 Stepper(_:value:step:onEditingChanged:) to create a stepper with a custom title that increments or decrements a binding to value by the step size you specify.

In the example below, the stepper increments or decrements the binding value by 5 each time one of the user clicks or taps the control’s increment or decrement buttons:


struct StepperView: View {
    @State private var value = 1
    let step = 5
    let title: String


    var body: some View {
        Stepper(title, value: $value, step: step)
            .padding(10)
    }
}

A view displaying a stepper that increments or decrements by 1 each

See Also 参照

ステッパーを作成する

init<V>(value: Binding<V>, step: V.Stride, label: () -> Label, onEditingChanged: (Bool) -> Void)
Creates a stepper configured to increment or decrement a binding to a value using a step value you provide.
Available when Label conforms to View. LabelがViewに準拠する場合に利用可能です。
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。