Bring widgets to life

3:54 - Usage for the container background modifier

.containerBackground(for: .widget) {
    Color.cosmicLatte
}

4:22 - Define a preview for the caffeine tracker widget

#Preview(as: WidgetFamily.systemSmall) {
    CaffeineTrackerWidget()
} timeline: {
    CaffeineLogEntry.log1
    CaffeineLogEntry.log2
    CaffeineLogEntry.log3
    CaffeineLogEntry.log4
}

5:41 - Add a numeric text content transition

struct TotalCaffeineView: View {
    let totalCaffeine: Measurement<UnitMass>

    var body: some View {
        VStack(alignment: .leading) {
            Text("Total Caffeine")
                .font(.caption)

            Text(totalCaffeine.formatted())
                .font(.title)
                .minimumScaleFactor(0.8)
                .contentTransition(.numericText(value: totalCaffeine.value))
        }
        .foregroundColor(.espresso)
        .bold()
        .frame(maxWidth: .infinity, alignment: .leading)
    }
}

6:21 - Set up transition on LastDrinkView

struct LastDrinkView: View {
    let log: CaffeineLog

    var body: some View {
        VStack(alignment: .leading) {
            Text(log.drink.name)
                .bold()
            Text("\(log.date, format: Self.dateFormatStyle) · \(caffeineAmount)")
        }
        .font(.caption)
        .id(log)
        .transition(.push(from: .bottom))
    }

    var caffeineAmount: String {
        log.drink.caffeine.formatted()
    }

    static var dateFormatStyle = Date.FormatStyle(
        date: .omitted, time: .shortened)
}

7:18 - Configuring animation for the transition

struct LastDrinkView: View {
    let log: CaffeineLog

    var body: some View {
        VStack(alignment: .leading) {
            Text(log.drink.name)
                .bold()
            Text("\(log.date, format: Self.dateFormatStyle) · \(caffeineAmount)")
        }
        .font(.caption)
        .id(log)
        .transition(.push(from: .bottom))
        .animation(.smooth(duration: 1.8), value: log)
    }

    var caffeineAmount: String {
        log.drink.caffeine.formatted()
    }

    static var dateFormatStyle = Date.FormatStyle(
        date: .omitted, time: .shortened)
}

9:18 - Reload the timeline for a widget

WidgetCenter.shared.reloadTimelines(ofKind: "LocationForecast")

13:06 - App intent to log a caffeine drink

import AppIntents

struct LogDrinkIntent: AppIntent {
    static var title: LocalizedStringResource = "Log a drink"
    static var description = IntentDescription("Log a drink and its caffeine amount.")

    @Parameter(title: "Drink", optionsProvider: DrinksOptionsProvider())
    var drink: Drink

    init() {}

    init(drink: Drink) {
        self.drink = drink
    }

    func perform() async throws -> some IntentResult {
        await DrinksLogStore.shared.log(drink: drink)
        return .result()
    }
}

15:10 - Create view to log a new drink

struct LogDrinkView: View {
    var body: some View {
        Button(intent: LogDrinkIntent(drink: .espresso)) {
            Label("Espresso", systemImage: "plus")
                .font(.caption)
        }
        .tint(.espresso)
    }
}

16:28 - Use the invalidatable content modifier

struct TotalCaffeineView: View {
    let totalCaffeine: Measurement<UnitMass>

    var body: some View {
        VStack(alignment: .leading) {
            Text("Total Caffeine")
                .font(.caption)

            Text(totalCaffeine.formatted())
                .font(.title)
                .minimumScaleFactor(0.8)
                .contentTransition(.numericText(value: totalCaffeine.value))
                .invalidatableContent()
        }
        .foregroundColor(.espresso)
        .bold()
        .frame(maxWidth: .infinity, alignment: .leading)
    }
}