Neues Icon, parallele Downloads

ABS Client/DownloadWidgetExtension/DownloadActivityAttributes.swift

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+import ActivityKit
+import Foundation
+
+/// Shared between the main app (to drive the activity lifecycle) and the
+/// DownloadWidgetExtension (to render the Lock Screen / Dynamic Island UI).
+/// Both targets must compile this exact definition — keep them in sync.
+struct DownloadActivityAttributes: ActivityAttributes {
+    /// Item title set once at activity start; never changes during the download.
+    let itemTitle: String
+
+    struct ContentState: Codable, Hashable {
+        /// Overall fraction across all tracks (0.0 – 1.0).
+        var progress: Double
+        /// Total bytes written to disk so far, shown as "X MB downloaded".
+        var bytesDownloaded: Int64
+    }
+}

ABS Client/DownloadWidgetExtension/DownloadLiveActivityWidget.swift

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+import ActivityKit
+import SwiftUI
+import WidgetKit
+
+// MARK: - Widget configuration
+
+struct DownloadLiveActivityWidget: Widget {
+    var body: some WidgetConfiguration {
+        ActivityConfiguration(for: DownloadActivityAttributes.self) { context in
+            // Lock Screen / Notification Center banner
+            DownloadLockScreenView(context: context)
+                .activityBackgroundTint(Color(.systemBackground).opacity(0.6))
+        } dynamicIsland: { context in
+            DynamicIsland {
+                // Expanded region shown when the user long-presses the island
+                DynamicIslandExpandedRegion(.leading) {
+                    Image(systemName: "arrow.down.circle.fill")
+                        .foregroundStyle(.blue)
+                        .font(.title2)
+                }
+                DynamicIslandExpandedRegion(.center) {
+                    Text(context.attributes.itemTitle)
+                        .font(.caption.bold())
+                        .lineLimit(1)
+                        .minimumScaleFactor(0.8)
+                }
+                DynamicIslandExpandedRegion(.bottom) {
+                    VStack(spacing: 4) {
+                        ProgressView(value: context.state.progress)
+                            .tint(.blue)
+                        HStack {
+                            Text(bytesFormatted(context.state.bytesDownloaded))
+                                .font(.caption2)
+                                .foregroundStyle(.secondary)
+                            Spacer()
+                            Text(percentFormatted(context.state.progress))
+                                .font(.caption2.bold())
+                                .monospacedDigit()
+                        }
+                    }
+                }
+            } compactLeading: {
+                Image(systemName: "arrow.down.circle.fill")
+                    .foregroundStyle(.blue)
+                    .font(.caption)
+            } compactTrailing: {
+                Text(percentFormatted(context.state.progress))
+                    .font(.caption2.bold())
+                    .monospacedDigit()
+            } minimal: {
+                Image(systemName: "arrow.down.circle.fill")
+                    .foregroundStyle(.blue)
+                    .font(.caption2)
+            }
+        }
+    }
+}
+
+// MARK: - Lock Screen view
+
+struct DownloadLockScreenView: View {
+    let context: ActivityViewContext<DownloadActivityAttributes>
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            HStack(spacing: 8) {
+                Image(systemName: "arrow.down.circle.fill")
+                    .foregroundStyle(.blue)
+                Text(context.attributes.itemTitle)
+                    .font(.subheadline.bold())
+                    .lineLimit(1)
+                Spacer()
+                Text(percentFormatted(context.state.progress))
+                    .font(.subheadline.bold())
+                    .monospacedDigit()
+            }
+            ProgressView(value: context.state.progress)
+                .tint(.blue)
+            Text(bytesFormatted(context.state.bytesDownloaded) + " heruntergeladen")
+                .font(.caption)
+                .foregroundStyle(.secondary)
+        }
+        .padding()
+    }
+}
+
+// MARK: - Helpers
+
+private func percentFormatted(_ fraction: Double) -> String {
+    String(format: "%.0f%%", fraction * 100)
+}
+
+private func bytesFormatted(_ bytes: Int64) -> String {
+    let mb = Double(bytes) / (1_024 * 1_024)
+    if mb >= 1 { return String(format: "%.1f MB", mb) }
+    let kb = Double(bytes) / 1_024
+    if kb >= 1 { return String(format: "%.0f KB", kb) }
+    return "\(bytes) B"
+}
+
+// MARK: - Previews
+
+private let previewAttributes = DownloadActivityAttributes(itemTitle: "The Name of the Wind")
+
+#Preview("Lock Screen", as: .content, using: previewAttributes) {
+    DownloadLiveActivityWidget()
+} contentStates: {
+    DownloadActivityAttributes.ContentState(progress: 0.35, bytesDownloaded: 52_428_800)
+    DownloadActivityAttributes.ContentState(progress: 0.9, bytesDownloaded: 135_266_304)
+}
+
+#Preview("Dynamic Island Expanded", as: .dynamicIsland(.expanded), using: previewAttributes) {
+    DownloadLiveActivityWidget()
+} contentStates: {
+    DownloadActivityAttributes.ContentState(progress: 0.35, bytesDownloaded: 52_428_800)
+    DownloadActivityAttributes.ContentState(progress: 0.9, bytesDownloaded: 135_266_304)
+}
+
+#Preview("Dynamic Island Compact", as: .dynamicIsland(.compact), using: previewAttributes) {
+    DownloadLiveActivityWidget()
+} contentStates: {
+    DownloadActivityAttributes.ContentState(progress: 0.35, bytesDownloaded: 52_428_800)
+    DownloadActivityAttributes.ContentState(progress: 0.9, bytesDownloaded: 135_266_304)
+}
+
+#Preview("Dynamic Island Minimal", as: .dynamicIsland(.minimal), using: previewAttributes) {
+    DownloadLiveActivityWidget()
+} contentStates: {
+    DownloadActivityAttributes.ContentState(progress: 0.35, bytesDownloaded: 52_428_800)
+}

ABS Client/DownloadWidgetExtension/DownloadWidgetBundle.swift

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+// MARK: - Widget Extension Entry Point
+//
+// HOW TO WIRE THIS UP IN XCODE (one-time setup):
+//
+// 1. File > New > Target > Widget Extension
+//    - Product Name: DownloadWidgetExtension
+//    - Bundle ID:    com.local.ABS-Client.DownloadWidgetExtension
+//    - Uncheck "Include Configuration App Intent"
+//    - Minimum deployment: iOS 16.2 (first stable ActivityKit release)
+//
+// 2. In the new target's Build Phases > Compile Sources, add:
+//    - DownloadWidgetBundle.swift          (this file)
+//    - DownloadLiveActivityWidget.swift
+//    - DownloadActivityAttributes.swift    (the copy in this folder)
+//
+// 3. In the main app target's Build Phases > Compile Sources, confirm:
+//    - DownloadActivityAttributes.swift    (the copy in Services/)
+//    is included. The two copies must stay identical.
+//
+// 4. In the main app's Build Phases > Embed App Extensions, add the
+//    DownloadWidgetExtension.appex product.
+
+import SwiftUI
+import WidgetKit
+
+@main
+struct DownloadWidgetBundle: WidgetBundle {
+    var body: some Widget {
+        DownloadLiveActivityWidget()
+    }
+}