Customizing Content Card Templates

This tutorial explains how to customize the UI of content card in your application.

Overview

Messaging extension provides a way to customize content cards based on the template type. You can customize the content card templates using the ContentCardCustomizing protocol.

Implementing ContentCardCustomizing

Perform the following steps to customize content card templates:

  1. Conform to the ContentCardCustomizing protocol in your class or struct.
  2. Implement the desired methods of the ContentCardCustomizing protocol.

Below is an example implementation of ContentCardCustomizing. In this example, the HomePageCardCustomizer class conforms to the ContentCardCustomizing protocol and customizes the SmallImageTemplate content card template:

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Swift

class HomePageCardCustomizer: ContentCardCustomizing {

    func customize(template: SmallImageTemplate) {
        // customize UI elements
        template.title.textColor = .primary
        template.title.font = .subheadline
        template.body?.textColor = .secondary
        template.buttons?.first?.text.font = .system(size: 13)

        // customize stack structure
        template.rootHStack.spacing = 15
        template.textVStack.alignment = .leading
        template.textVStack.spacing = 10

        // add custom modifiers
        template.buttonHStack.modifier = AEPViewModifier(ButtonHStackModifier())
        template.rootHStack.modifier = AEPViewModifier(RootHStackModifier())

        // customize the dismiss buttons
        template.dismissButton?.image.iconColor = .primary
        template.dismissButton?.image.iconFont = .system(size: 10)
    }

    struct RootHStackModifier : ViewModifier {
        func body(content: Content) -> some View {
             content
                .frame(maxWidth: .infinity, alignment: .leading)
                .padding(.trailing)
         }
    }

    struct ButtonHStackModifier : ViewModifier {
        func body(content: Content) -> some View {
             content
                .frame(maxWidth: .infinity, alignment: .trailing)
         }
    }
}

Applying Customizations

To apply the customizations to the content card templates, pass the customizer to the getContentCardsUI API. The customizer will be called for each content card template type that is recognized by the Messaging extension.

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Swift

let homePageSurface = Surface(path: "homepage")
let homePageCardCustomizer = HomePageCardCustomizer()
Messaging.getContentCardsUI(for: homePageSurface,
                             customizer: homePageCardCustomizer) { result in
    // handle result
}

Customize the content card templates for different surfaces by creating a customizer for each surface. For example, the following code snippet customizes the content card templates for the "homepage" and "detailpage" content cards separately:

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Swift

let homePageSurface = Surface(path: "homepage")
let homePageCustomizer = HomePageCardCustomizer()
Messaging.getContentCardsUI(for: homePageSurface,
                             customizer: homePageCustomizer) { result in
    // handle result
}

let detailPageSurface = Surface(path: "detailpage")
let detailPageCustomizer = DetailPageCardCustomizer()
Messaging.getContentCardsUI(for: detailPageSurface,
                             customizer: detailPageCustomizer) { result in
    // handle result
}