WWDC 2026：苹果要把 AI 从"功能"做成"系统"

import AppIntents

// 1. 定义一个实体类型，让系统理解你的数据
struct TravelPlanEntity: AppEntity {
    var id: String
    var destination: String
    var departureDate: Date
    var notes: String

    static var typeDisplayRepresentation = TypeDisplayRepresentation(name: "出差计划")
    static var defaultQuery = TravelPlanQuery()

    var displayRepresentation: DisplayRepresentation {
        DisplayRepresentation(title: "\(destination) 出差", subtitle: "\(departureDate.formatted(date: .abbreviated, time: .shortened))")
    }
}

// 2. 定义一个 App Intent，让系统可以执行你的功能
struct CreateTravelPlanIntent: AppIntent {
    static var title: LocalizedStringResource = "创建出差计划"
    static var description = IntentDescription("根据邮件或对话中的出差信息，自动创建出差计划")
    static var openAppWhenRun = true

    @Parameter(title: "目的地")
    var destination: String

    @Parameter(title: "出发日期")
    var departureDate: Date

    @Parameter(title: "备注")
    var notes: String?

    func perform() async throws -> some IntentResult & ReturnsItem<TravelPlanEntity> {
        // 实际项目中这里会调用你的数据层
        let plan = TravelPlanEntity(
            id: UUID().uuidString,
            destination: destination,
            departureDate: departureDate,
            notes: notes ?? ""
        )
        // 保存到本地数据库或 CloudKit
        try await TravelPlanStore.shared.save(plan)
        return .result(item: plan)
    }
}

// 3. 定义快捷动作，让 Siri / Spotlight 可以直接触发
struct TravelPlanShortcuts: AppShortcutsProvider {
    static var appShortcuts: [AppShortcut] {
        AppShortcut(
            intent: CreateTravelPlanIntent(),
            phrases: [
                "用\(.applicationName)创建出差计划去\(\.$destination)",
                "帮我安排去\(\.$destination)的出差"
            ],
            shortTitle: "创建出差计划",
            systemImageName: "airplane"
        )
    }
}

import FoundationModels

@MainActor
func summarizeEmail(content: String) async throws -> String {
    // 创建一个系统指令，约束模型输出格式
    let instructions = Instructions(
        "你是一个邮件摘要助手。用中文输出，不超过三句话，只提取关键行动项。"
    )

    // 调用设备端模型
    let session = LanguageModelSession(instructions: instructions)
    let response = try await session.respond(to: "总结以下邮件内容：\n\(content)")

    return response.content
}