WidgetKit - Small 代码记录

//
//  ssss.swift
//  ssss
//
//  Created by 黄震 on 2020/10/2.
//

import WidgetKit
import SwiftUI
import Intents

struct Provider: IntentTimelineProvider {
    func placeholder(in context: Context) -> SimpleEntry {
        SimpleEntry(date: Date(), configuration: ConfigurationIntent())
    }
    
    func getSnapshot(for configuration: ConfigurationIntent, in context: Context, completion: @escaping (SimpleEntry) -> ()) {
        let entry = SimpleEntry(date: Date(), configuration: configuration)
        completion(entry)
    }
    
    func getTimeline(for configuration: ConfigurationIntent, in context: Context, completion: @escaping (Timeline<Entry>) -> ()) {
        var entries: [SimpleEntry] = []
        
        // Generate a timeline consisting of five entries an hour apart, starting from the current date.
        let currentDate = Date()
        for hourOffset in 0 ..< 5 {
            let entryDate = Calendar.current.date(byAdding: .hour, value: hourOffset, to: currentDate)!
            let entry = SimpleEntry(date: entryDate, configuration: configuration)
            entries.append(entry)
        }
        
        let timeline = Timeline(entries: entries, policy: .atEnd)
        completion(timeline)
    }
}

struct SimpleEntry: TimelineEntry {
    let date: Date
    let configuration: ConfigurationIntent
}

struct ssssEntryView : View {
    var entry: Provider.Entry
    
    var body: some View {
        GeometryReader { geo in
            VStack(alignment: .leading, spacing: 10) {
                Text("标题1 ")
                    .font(.subheadline)
                    .foregroundColor(Color.red)
                VStack(alignment: .leading, spacing: 4) {
                    Text("标题2 ")
                        .padding(.top, 11.0)
                    Text("内容2")
                        .font(.subheadline)
                }
                VStack(alignment: .leading, spacing: 4) {
                    Text("标题三")
                        .padding(.top, 5.0)
                    Text("内容三")
                        .foregroundColor(Color.blue)
                        .font(Font.system(size: 14))
                }
            }
            .font(.caption)
            .padding(EdgeInsets(top: 14, leading: 16, bottom: 18, trailing: 16))
            .frame(width: geo.size.width, height: geo.size.height, alignment: .topLeading)
            .fixedSize(horizontal: true, vertical: true)
        }
    }
}

@main
struct ssss: Widget {
    let kind: String = "ssss"
    
    var body: some WidgetConfiguration {
        IntentConfiguration(kind: kind, intent: ConfigurationIntent.self, provider: Provider()) { entry in
            ssssEntryView(entry: entry)
        }
        .configurationDisplayName("My Widget")
        .description("This is an example widget.")
    }
}

struct ssss_Previews: PreviewProvider {
    static var previews: some View {
        ssssEntryView(entry: SimpleEntry(date: Date(), configuration: ConfigurationIntent()))
            .previewContext(WidgetPreviewContext(family: .systemSmall))
    }
}