add: QRCodeWidget 생성 (TeamNADA#364)

Widgets/WidgetsBundle/QRCodeWidget.swift

@@ -0,0 +1,54 @@
+//
+//  QRCodeWidget.swift
+//  WidgetsExtension
+//
+//  Created by kimhyungyu on 2023/02/05.
+//
+
+import WidgetKit
+import SwiftUI
+
+struct QRCodeProvider: TimelineProvider {
+    func placeholder(in context: Context) -> QRCodeEntry {
+        QRCodeEntry(date: Date())
+    }
+
+    func getSnapshot(in context: Context, completion: @escaping (QRCodeEntry) -> Void) {
+        let entry = QRCodeEntry(date: Date())
+        completion(entry)
+    }
+
+    func getTimeline(in context: Context, completion: @escaping (Timeline<Entry>) -> Void) {
+        var entries: [QRCodeEntry] = []
+
+        let currentDate = Date()
+        for hourOffset in 0 ..< 5 {
+            let entryDate = Calendar.current.date(byAdding: .hour, value: hourOffset, to: currentDate)!
+            let entry = QRCodeEntry(date: entryDate)
+            entries.append(entry)
+        }
+
+        let timeline = Timeline(entries: entries, policy: .never)
+        completion(timeline)
+    }
+}
+
+struct QRCodeEntry: TimelineEntry {
+    let date: Date
+}
+struct QRCodeWidget: Widget {
+    let kind: String = "QRCodeWidget"
+
+    var body: some WidgetConfiguration {
+        StaticConfiguration(kind: kind,
+                            provider: QRCodeProvider()) { entry in
+            QRCodeEntryView(entry: entry)
+        }
+}
+
+struct QRCodeWidget_Previews: PreviewProvider {
+    static var previews: some View {
+        QRCodeEntryView(entry: QRCodeEntry(date: Date()))
+            .previewContext(WidgetPreviewContext(family: .systemSmall))
+    }
+}