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WWDC22 · 11 min · SwiftUI & UI Frameworks / App Services

Go further with Complications in WidgetKit

Discover how you can use WidgetKit to create beautiful complications on watch faces. We’ll introduce you to the watchOS-specific features found in WidgetKit, and help you migrate from existing ClockKit complications. For more on WidgetKit, watch “Complications and Widgets: Reloaded” from WWDC22.

Watch at developer.apple.com ↗

Transcript all transcripts

Code shown on screen · 9 snippets

Large Corner swift · at 3:06 ↗ 
struct CornerView: View {
    let value: Double

    var body: some View {

        ZStack {
            AccessoryWidgetBackground()
            Image(systemName: "cup.and.saucer.fill")
                .font(.title.bold())
                .widgetAccentable()
        }

    }
}
Corner with Gauge swift · at 3:27 ↗ 
struct CornerView: View {
    let value: Double

    var body: some View {

        ZStack {
            AccessoryWidgetBackground()
            Image(systemName: "cup.and.saucer.fill")
                .font(.title.bold())
                .widgetAccentable()
        }
        .widgetLabel {
            Gauge(value: value,
              in: 0...500) {
                Text("MG")
            } currentValueLabel: {
                Text("\(Int(value))")
            } minimumValueLabel: {
                Text("0")
            } maximumValueLabel: {
                Text("500")
            }
        }


    }
}
Circular Gauge swift · at 4:24 ↗ 
struct CircularView: View {
    let value: Double

    var body: some View {

        Gauge(value: value,
              in: 0...500) {
            Text("MG")
        } currentValueLabel: {
            Text("\(Int(value))")
        }
        .gaugeStyle(.circular)

    }
}
Circular Gauge with Widget Label swift · at 4:34 ↗ 
struct CircularView: View {
    let value: Double

    var body: some View {
        let mg = value.inMG()

        Gauge(value: value,
              in: 0...500) {
            Text("MG")
        } currentValueLabel: {
            Text("\(Int(value))")
        }
        .gaugeStyle(.circular)
        .widgetLabel {
            Text("\(mg, formatter: mgFormatter) Caffeine")
        }

    }

    var mgFormatter: Formatter {
        let formatter = MeasurementFormatter()
        formatter.unitOptions = [.providedUnit]
        return formatter
    }
}

extension Double {
    func inMG() -> Measurement<UnitMass> {
        Measurement<UnitMass>(value: self, unit: .milligrams)
    }
}
Circular Stack with Widget Label swift · at 4:51 ↗ 
struct CircularView: View {
    let value: Double

    var body: some View {
        let mg = value.inMG()

        ZStack {
            AccessoryWidgetBackground()
            Image(systemName: "cup.and.saucer.fill")
                .font(.title.bold())
                .widgetAccentable()
        }
        .widgetLabel {
            Text("\(mg, formatter: mgFormatter) Caffeine")
        }

    }

    var mgFormatter: Formatter {
        let formatter = MeasurementFormatter()
        formatter.unitOptions = [.providedUnit]
        return formatter
    }
}

extension Double {
    func inMG() -> Measurement<UnitMass> {
        Measurement<UnitMass>(value: self, unit: .milligrams)
    }
}
Circular Stack or Gauge swift · at 5:12 ↗ 
struct CircularView: View {
    let value: Double
    @Environment(\.showsWidgetLabel) var showsWidgetLabel

    var body: some View {
        let mg = value.inMG()
        if showsWidgetLabel {
            ZStack {
                AccessoryWidgetBackground()
                Image(systemName: "cup.and.saucer.fill")
                    .font(.title.bold())
                    .widgetAccentable()
            }
            .widgetLabel {
                Text("\(mg, formatter: mgFormatter) Caffeine")
            }
        }
        else {
            Gauge(value: value,
                  in: 0...500) {
                Text("MG")
            } currentValueLabel: {
                Text("\(Int(value))")
            }
            .gaugeStyle(.circular)
        }

    }

    var mgFormatter: Formatter {
        let formatter = MeasurementFormatter()
        formatter.unitOptions = [.providedUnit]
        return formatter
    }
}

extension Double {
    func inMG() -> Measurement<UnitMass> {
        Measurement<UnitMass>(value: self, unit: .milligrams)
    }
}
Widget Migrator swift · at 9:47 ↗ 
var widgetMigrator: CLKComplicationWidgetMigrator {
    self
}
Static Migration Configuration swift · at 9:56 ↗ 
func widgetConfiguration(from complicationDescriptor: CLKComplicationDescriptor) async -> CLKComplicationWidgetMigrationConfiguration? {
    CLKComplicationStaticWidgetMigrationConfiguration(kind: "CoffeeTracker", extensionBundleIdentifier: widgetBundle)
}
Intent Migration Configuration swift · at 10:03 ↗ 
func widgetConfiguration(from complicationDescriptor: CLKComplicationDescriptor) async -> CLKComplicationWidgetMigrationConfiguration? {
    CLKComplicationIntentWidgetMigrationConfiguration(kind: "CoffeeTracker", extensionBundleIdentifier: widgetBundle, intent: intent, localizedDisplayName: "Coffee Tracker")
}

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