WidgetKit

import WidgetKit
import SwiftUI

struct SimpleWidget: Widget {
    let kind: String = "SimpleWidget"
    
    var body: some WidgetConfiguration {
        StaticConfiguration(kind: kind, provider: Provider()) { entry in
            SimpleWidgetEntryView(entry: entry)
        }
        .configurationDisplayName("My Widget")
        .description("This is an example widget.")
        .supportedFamilies([.systemSmall, .systemMedium, .systemLarge])
    }
}

import WidgetKit

struct Provider: TimelineProvider {
    func placeholder(in context: Context) -> SimpleEntry {
        SimpleEntry(date: Date(), text: "Placeholder")
    }
    
    func getSnapshot(in context: Context, completion: @escaping (SimpleEntry) -> ()) {
        let entry = SimpleEntry(date: Date(), text: "Snapshot")
        completion(entry)
    }
    
    func getTimeline(in context: Context, completion: @escaping (Timeline<Entry>) -> ()) {
        var entries: [SimpleEntry] = []
        
        let currentDate = Date()
        for hourOffset in 0 ..< 5 {
            let entryDate = Calendar.current.date(byAdding: .hour, value: hourOffset, to: currentDate)!
            let entry = SimpleEntry(date: entryDate, text: "Hour \(hourOffset)")
            entries.append(entry)
        }
        
        let timeline = Timeline(entries: entries, policy: .atEnd)
        completion(timeline)
    }
}

struct SimpleEntry: TimelineEntry {
    let date: Date
    let text: String
}

import SwiftUI
import WidgetKit

struct SimpleWidgetEntryView: View {
    var entry: Provider.Entry
    
    var body: some View {
        VStack {
            Text(entry.date, style: .time)
                .font(.headline)
            Text(entry.text)
                .font(.caption)
        }
        .containerBackground(.fill.tertiary, for: .widget)
    }
}