Stepper iOS Tutorial

The UIStepper control  provides a simple way to change a numeral value. It consists of +/- symbols that increment/decrement an internal value. In this tutorial we will change the value of a label field using the UIStepper buttons.  This tutorial is made with Xcode 10 and built for iOS 12.

Open Xcode and create a new Single View App.

For product name, use IOSStepperTutorial and then fill out the Organization Name and Organization Identifier with your customary values. Enter Swift as Language and choose Next.

Go to the Storyboard and drag a Label and a Stepper to the main View. Select the Label and in the Attributes inspector change the font in System Bold 25.0 and select the center alignment button. Give the Label a text Value of "0".

Select the Resolve Auto Layout Issues button and select Reset to Suggested Constraints.

Select the Assistant Editor and make sure the ViewController.swift file is visible. Ctrl-drag or right-click-drag from the Label to the ViewController class and create the following Outlet.

Ctrl-drag or right-click-drag from the Stepper to the ViewController class and create the following Outlet.

Ctrl-drag or right-click-drag from the Stepper to the ViewController class and create the following Action.

The Storyboard should look like this.

Go to the ViewController.swift file and change the viewDidLoad method to

override func viewDidLoad() {
  super.viewDidLoad()
  
  stepper.wraps = true 
  stepper.autorepeat = true
  stepper.maximumValue = 10
}

@IBAction func stepperValueChanged(_ sender: UIStepper) {
    valueLabel.text = Int(sender.value).description
}

The description value of the Stepper is assigned to the text property of the Label.

Build and Runthe project, When the user clicks on the +/- symbols, the current value of the stepper will be assigned to the stepper label.

You can download the source code of the IOSStepperTutorial at the ioscreator repository on github .