• This component allows users to increment or decrement a value by clicking + and - signs on stepper.

Stepper | Apple Developer Documentation

A control that performs increment and decrement actions.

https://developer.apple.com/documentation/swiftui/stepper

• We can use a stepper to:
  1. Change a value up or down by 1
  2. Operate strictly over a prescribed range.
  3. Step by specific amounts over a stepper’s range of possible values

Stepper("Stepper", value: Binding<Strideable>)

what is Strideable?

1. Create an integer variable with value 10, and bind it into value: with $ sign

@State var stepperValue: Int = 10
    
    var body: some View {
        Stepper("Stepper", value: $stepperValue)
    }

2. add a variable inside the text, using \(variable)

Stepper("Stepper: \(stepperValue)", value $stepperValue).padding(20)

We will create a rectangle that changes the size by clicking the stepper

• Choose a stepper with onIncrement and onDecrement

Stepper("Stepper 2") {
...
} onDecrement: {
...
}

• Create integer 0 variable

@State var add: Int = 0

• Add add into a rounded rectangle width

RoundedRectangle(cornerRadius: 25.0)
	.frame(width: 100 + CGFloat(add), height: 100)

• add variable into the increment and decrement

Stepper("Stepper 2") {
add += 10
} onDecrement: {
add -= 10
}

• Add easeInOut animation to Stepper by creating outside function

func incrementWidth(amount: CGFloat){
	withAnimation(.easeInOut){
			add += Int(amount)
		}
}

Stepper("Stepper 2") {
                incrementWidth(amount: 10)
            } onDecrement: {
                incrementWidth(amount: -10)
            }

Stepper enables users to increase or decrease a value by clicking the + and - signs.

The view element can be edited or modified smoothly using withAnimation.

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