Stepper And Slider

Part of the Introduction to SwiftUI section of Coddy's Swift journey. Lesson 26 of 50.

A Stepper has - and + buttons that change a number. The in: range keeps the value inside limits:

@State private var cups = 1

Stepper("Cups: \(cups)", value: $cups, in: 1...5)

At 5 the + button stops working, and at 1 the - button does. step: changes by more than one at a time.

A Slider picks a Double by dragging:

@State private var volume = 50.0

Slider(value: $volume, in: 0...100, step: 5)

The state is a Double, so write 50.0, not 50, when you declare it.

Challenge

Easy

Let the user choose how many tickets to buy. Replace the text with a Stepper titled Tickets: 1, Tickets: 2, ... bound to tickets, from 1 to 4. Give the stepper the identifier tickets.

Try it yourself

import SwiftUI

@main
struct CoddyApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Introduction to SwiftUI

1Introduction

What Is SwiftUI The App File

4Modifiers

Padding Backgrounds Modifier Order Frames And Shapes Recap - Badge Maker

7Lists

ForEach Identifiable Items List Adding Items Recap - Shopping List

10Project - Coddy Coffee

Project Overview Drink Screens

Choose A Size

Quantity And Total

Place The Order

2Showing Content

Text Views Numbers In Text Fonts Colors SF Symbols Recap - Price Tag

5State & Buttons

Buttons The @State Property True Or False State Conditional Views Recap - Score Keeper

8Navigation

NavigationStack NavigationLink Passing Data Sheets And Alerts Recap - Plant Guide

11Final Challenges

Tip Calculator To-Do List True Or False Game

3Stacks & Layout

VStack HStack Alignment And Spacing Spacer And ZStack Recap - Weather Card

6User Input

TextField ToggleStepper And SliderPicker Recap - Order Form

9Sharing Data

The @Binding Property Observable Objects Environment Objects Recap - Step Counter

Practice on your own: Swift playground