一个Android开发学习开发ios桌面小组件

1 创建widget extension

2 创建完成之后理论上就可以运行了

关键代码包括 TimelineProvider TimelineEntry

正常代码是下面这样的

js 复制代码

//
//  home_widget_study.swift
//  home_widget_study
//
//  Created by gy on 2025/3/7.
//

import WidgetKit
import SwiftUI

struct Provider: TimelineProvider {
    func placeholder(in context: Context) -> SimpleEntry {
        SimpleEntry(date: Date(), emoji: "😀")
    }

    func getSnapshot(in context: Context, completion: @escaping (SimpleEntry) -> ()) {
        let entry = SimpleEntry(date: Date(), emoji: "😀")
        completion(entry)
    }

    func getTimeline(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, emoji: "😀")
            entries.append(entry)
        }

         //entries 定义了刷新的时间 这里数组长度为5 每个元素的时间相差一小时 意思就是从小组件添加之后一小时刷新一次 好像这个时间不能设置的太短 最短好像是5分钟
        let timeline = Timeline(entries: entries, policy: .atEnd)
        completion(timeline)
    }

//    func relevances() async -> WidgetRelevances<Void> {
//        // Generate a list containing the contexts this widget is relevant in.
//    }
}


//里面的属性可以根据自己的需求 自定义
//但是这个date 好像是必须的 意思是下次刷新的时间 因为小组件不会自己刷新
struct SimpleEntry: TimelineEntry {
    let date: Date
    let emoji: String
}

struct home_widget_studyEntryView : View {
    var entry: Provider.Entry

    var body: some View {
        VStack {
            Text("Time:")
            Text(entry.date, style: .time)

            Text("Emoji:")
            Text(entry.emoji)
        }
    }
}

struct home_widget_study: Widget {
    let kind: String = "home_widget_study"

    var body: some WidgetConfiguration {
        StaticConfiguration(kind: kind, provider: Provider()) { entry in
            if #available(iOS 17.0, *) {
                home_widget_studyEntryView(entry: entry)
                    .containerBackground(.fill.tertiary, for: .widget)
            } else {
                home_widget_studyEntryView(entry: entry)
                    .padding()
                    .background()
            }
        }
        .configurationDisplayName("My Widget")
        .description("This is an example widget.")
    }
}

#Preview(as: .systemSmall) {
    home_widget_study()
} timeline: {
    SimpleEntry(date: .now, emoji: "😀")
    SimpleEntry(date: .now, emoji: "🤩")
}

如果你的TimerLineProvider初始代码如下，运行会报错。你可以参考上面的代码修改调整一下。下面的代码好像是高版本的写法。

js 复制代码

func placeholder(in context: Context) -> SimpleEntry {
        SimpleEntry(date: Date(),model: 0)
    }

    func snapshot(for configuration: ConfigurationAppIntent, in context: Context) async -> SimpleEntry {
        SimpleEntry(date: Date(), configuration: configuration,model: "456")
    }
    
    func timeline(for configuration: ConfigurationAppIntent, in context: Context) async -> Timeline<SimpleEntry> {
        var entries: [SimpleEntry] = []

        print("timelinetimelinetimelinetimelinetimeline===================")
        // Generate a timeline consisting of five entries an hour apart, starting from the current date.
        let currentDate = Date()
        let userdefaults = UserDefaults(suiteName: "group.com.aiintelligent.iossoftware.homewidget")
        let model = userdefaults?.string(forKey: "model") ?? "model"
        let a = print("==========model===",model)
        for hourOffset in 0 ..< 5 {
            let entryDate = Calendar.current.date(byAdding: .minute, value: hourOffset, to: currentDate)!
            let entry = SimpleEntry(date: entryDate,model: model)
            entries.append(entry)
        }

        return Timeline(entries: entries, policy: .atEnd)
    }

如果你的widget body 是如下代码也参照上面的修改这个好像也是高版本代码

js 复制代码

var body: some WidgetConfiguration {
        AppIntentConfiguration(kind: kind, intent: ConfigurationAppIntent.self, provider: Provider()) { entry in
            1EntryView(entry: entry)
                .containerBackground(.fill.tertiary, for: .widget)
        }
    }

3 主动刷新小组件

js 复制代码

WidgetCenter.shared.reloadTimelines(ofKind: "home_widget_study")

ofKind 在这里

4 主程序与小组件之间通信传递数据

group_name 需要在开发者后台配置在小组件跟主程序使用的group_name一定要一样，切必须是开发者后台配置的值。

js 复制代码

 var userdefaults = UserDefaults(suiteName: "group_name")