Class

WKInterfacePaymentButton

A button that you can use to trigger payments through Apple Pay.

Declaration

class WKInterfacePaymentButton : WKInterfaceObject

Overview

Use a payment button to initiate an Apple Pay transaction on Apple Watch.

Figure 1

Apple Pay Button

A screenshot of the Apple Pay Button.

Do not subclass or create instances of this class yourself. Instead, drag a Payment Button object from your Object Library and add it to your storyboard. Then define an outlet in your interface controller class and connect it to the payment button object. For example, to refer to a table object in your interface, define a property with the following syntax in your interface controller class:

@IBOutlet weak var paymentButton: WKInterfacePaymentButton!

During the initialization of your interface controller, WatchKit creates a new instance of this class and assigns it to your outlet. At that point, you can use the object in your outlet to make changes to the payment button. This class does not provide any new public methods or properties. However, it does inherit the methods and properties of its superclass, the WKInterfaceObject class.

To respond to taps in the payment button, declare a method of this form in the interface controller class that manages the button:

@IBAction func beginApplePayTransaction()

You can change the name of your action method to anything you like. In your Xcode storyboard, connect the button’s selector to the custom action method defined in your class. In the action method, create the payment request and present the payment sheet by calling a PKPaymentAuthorizationController object’s present(completion:) method.

Payment buttons can be used only to initiate Apple Pay transactions.

Relationships

Inherits From

Conforms To

See Also

Controls

class WKInterfaceLabel

An interface element that displays static text.

class WKInterfaceDate

A label that displays the current date or time.

class WKInterfaceTimer

A label that displays a countdown or count-up timer.

class WKInterfaceButton

A button in the user interface of your watchOS app.

class WKInterfaceSwitch

An interface element that toggles between an On and Off state.

class WKInterfaceSlider

An interface element that lets users select a single floating-point value from a range of values.

class WKInterfaceActivityRing

A view that displays data from a HealthKit activity summary object.

class WKInterfaceMap

An interface element that displays a noninteractive map for the location you specify.