Embedded SwiftUI example

[porter-stripe]

Summary

• Adds a sample SwiftUI integration with embedded
• Does not define the public API for the SwiftUI helpers yet. But we will likely expose something like EmbeddedPaymentElementView and a lightweight EmbeddedPaymentViewModel.
• Few highlights/notable things
  • Use of a container view in makeUIView is required. Instead of directly attaching the embedded view to SwiftUI, we use a container. This container gives us a fixed point to apply layout constraints and measure the embedded view's size. If we skipped the container and used the embedded view directly, its height would be undefined, causing constraint breakages and leading SwiftUI to treat it as zero.
  • Passing a binding between the UIViewRepresentable and the SwiftUI: There is a workaround that would allow us to remove this, but we lose the ability to animate smoothly. Passing this binding to the SwfitUI view allows us to animate the height.

Payment

Simulator.Screen.Recording.-.iOS.18.-.2025-01-08.at.10.07.20.mp4

Height animation

Simulator.Screen.Recording.-.iOS.18.-.2025-01-08.at.10.08.43.mp4

Motivation

• Embedded GA

Testing

• Manual

Changelog

N/A

[github-actions]

🚨 New dead code detected in this PR:

EmbeddedPaymentElement.swift:485 warning: Parameter 'embeddedPaymentElement' is unused
EmbeddedPaymentElementDelegate.swift:27 warning: Parameter 'embeddedPaymentElement' is unused

Please remove the dead code before merging.

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