SwiftUI improvements

[markmur]

What changes are you making?

• Rename CheckoutViewController.Representable to CheckoutSheet, Deprecate CheckoutViewController.Representable
• Add modifiers for colorScheme, backgroundColor, tintColor and title
• Removes the need for onReceive
• Improve sample app by adding cart functionality, triggering the checkout from another sheet
• Add tests for SwiftUI lifecycle methods
• Add tests for configuration modifiers
• Update readme

Video walkthrough of improved sample app

swift-ui-improvements.mp4

.sheet(isPresented: $isShowingCheckout, onDismiss: didDismiss) {
-  CheckoutViewController.Representable(checkout: $checkoutURL, delegate: eventHandler)
-    .onReceive(eventHandler.$didCancel, perform: { didCancel in
-      if didCancel {
-        isShowingCheckout = false
-      }
-    })
+  CheckoutSheet(checkout: $checkoutURL)
+    .title("Custom title")
+    .colorScheme(.automatic)
+    .backgroundColor(.black)
+    .tintColor(.systemBlue)
+    .onCancel {}
+    .onComplete { event in }
+    .onPixelEvent { event in }
+    .onFail { error in }
}

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Before you merge

Important

• I've added tests to support my implementation
• I have read and agree with the Contribution Guidelines.
• I have read and agree with the Code of Conduct.
• I've updated the README.
• I've updated any documentation related to these changes.

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Checklist for releasing a new version

• I have bumped the version number in the podspec file.
• I have bumped the version number in the README.
• I have added a Changelog entry.

Tip

See the Contributing documentation for instructions on how to publish a new version of the library.