WidgetKit中无法调用简单API的问题求助

问题场景 #

在WidgetKit组件中调用https://jsonplaceholder.typicode.com/posts/1接口时持续失败，返回DNS解析错误，但该接口在主应用、JavaScript脚本及cURL命令中均可正常访问。

实现代码 #

import WidgetKit
import SwiftUI

struct Post: Decodable {
    let title: String
}

struct Provider: AppIntentTimelineProvider {
    
    func placeholder(in context: Context) -> SimpleEntry {
        SimpleEntry(date: Date(), title: "Loading...", configuration: ConfigurationAppIntent())
    }

    func snapshot(for configuration: ConfigurationAppIntent, in context: Context) async -> SimpleEntry {
        SimpleEntry(date: Date(), title: "Preview Title", configuration: configuration)
    }

    func timeline(for configuration: ConfigurationAppIntent, in context: Context) async -> Timeline<SimpleEntry> {
        var entries: [SimpleEntry] = []

        let currentDate = Date()
        
        let title = await fetchPostTitle() ?? "Failed to load title"

        for hourOffset in 0..<5 {
            let entryDate = Calendar.current.date(byAdding: .hour, value: hourOffset, to: currentDate)!
            let entry = SimpleEntry(date: entryDate, title: title, configuration: configuration)
            entries.append(entry)
        }

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

    private func fetchPostTitle() async -> String? {
        let url = URL(string: "https://jsonplaceholder.typicode.com/posts/1")!
        
        do {
            let (data, _) = try await URLSession.shared.data(from: url)
            let post = try JSONDecoder().decode(Post.self, from: data)
            return post.title
        } catch {
            print("Error fetching post: \(error)")
            return nil
        }
    }
}

struct SimpleEntry: TimelineEntry {
    let date: Date
    let title: String
    let configuration: ConfigurationAppIntent
}

struct PostWidgetEntryView : View {
    var entry: Provider.Entry

    var body: some View {
        VStack {
            Text("Post Title:")
            Text(entry.title)
                .font(.headline)
                .multilineTextAlignment(.center)
                .padding()
            
            Text("Time:")
            Text(entry.date, style: .time)
                .font(.footnote)
        }
    }
}

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

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

错误信息（中文翻译） #

networkd_settings_read_from_file 沙箱阻止此进程读取位于"/Library/Preferences/com.apple.networkd.plist"的networkd设置文件，请添加例外。
此进程的沙箱配置文件阻止与网络内容过滤器通信，请修改沙箱配置文件以允许访问com.apple.nesessionmanager.content-filter Mach服务
nw_resolver_can_use_dns_xpc_block_invoke 沙箱不允许访问com.apple.dnssd.service服务
nw_resolver_create_dns_service_locked [C1.1] DNSServiceCreateDelegateConnection失败: ServiceNotRunning(-65563)
连接1: 收到失败通知
连接1: 连接失败 10:-72000, 原因-1
连接1: 遇到错误(10:-72000)
任务 <32EC2820-3C35-4D72-BDD6-541D73FFE25E>.<1> HTTP加载失败, 0/0字节 (错误码: -1003 [10:-72000])
任务 <32EC2820-3C35-4D72-BDD6-541D73FFE25E>.<1> 执行结束，错误[-1003] Error Domain=NSURLErrorDomain Code=-1003 "无法找到指定主机名的服务器。" UserInfo={_kCFStreamErrorCodeKey=-72000, NSUnderlyingError=0x12f606760 {Error Domain=kCFErrorDomainCFNetwork Code=-1003 "(null)" UserInfo={_kCFStreamErrorDomainKey=10, _kCFStreamErrorCodeKey=-72000, _NSURLErrorNWResolutionReportKey=在1ms内解析了0个端点，使用未知查询方式, _NSURLErrorNWPathKey=satisfied (路径已满足), 接口: en0[802.11], ipv4, dns, 使用wifi}}, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <32EC2820-3C35-4D72-BDD6-541D73FFE25E>.<1>, _NSURLErrorRelatedURLSessionTaskErrorKey=(
    "LocalDataTask <32EC2820-3C35-4D72-BDD6-541D73FFE25E>.<1>"
), NSLocalizedDescription=无法找到指定主机名的服务器。, NSErrorFailingURLStringKey=https://jsonplaceholder.typicode.com/posts/1, NSErrorFailingURLKey=https://jsonplaceholder.typicode.com/posts/1, _kCFStreamErrorDomainKey=10}
nw_resolver_create_dns_service_locked [C2.1] DNSServiceCreateDelegateConnection失败: ServiceNotRunning(-65563)
连接2: 收到失败通知
连接2: 连接失败 10:-72000, 原因-1
连接2: 遇到错误(10:-72000)
任务 <69DF6341-40DA-4519-B132-F827D665243F>.<2> HTTP加载失败, 0/0字节 (错误码: -1003 [10:-72000])
任务 <69DF6341-40DA-4519-B132-F827D665243F>.<2> 执行结束，错误[-1003] Error Domain=NSURLErrorDomain Code=-1003 "无法找到指定主机名的服务器。" UserInfo={_kCFStreamErrorCodeKey=-72000, NSUnderlyingError=0x140822a20 {Error Domain=kCFErrorDomainCFNetwork Code=-1003 "(null)" UserInfo={_kCFStreamErrorDomainKey=10, _kCFStreamErrorCodeKey=-72000, _NSURLErrorNWResolutionReportKey=在0ms内解析了0个端点，使用未知查询方式, _NSURLErrorNWPathKey=satisfied (路径已满足), 接口: en0[802.11], ipv4, dns, 使用wifi}}, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDownloadTask <69DF6341-40DA-4519-B132-F827D665243F>.<2>, _NSURLErrorRelatedURLSessionTaskErrorKey=(
    "LocalDownloadTask <69DF6341-40DA-4519-B132-F827D665243F>.<2>"
), NSLocalizedDescription=无法找到指定主机名的服务器。, NSErrorFailingURLStringKey=https://jsonplaceholder.typicode.com/posts/1, NSErrorFailingURLKey=https://jsonplaceholder.typicode.com/posts/1, _kCFStreamErrorDomainKey=10}
[S:1] 收到错误: 连接已失效。

解决步骤 #

问题根源在于Widget扩展的沙箱权限未配置网络出站权限，按以下步骤修复：

• 在Xcode中选中Widget对应的target（注意不是主应用target）
• 切换到Signing & Capabilities标签页
• 找到App Sandbox权限配置项，确保勾选了**Outgoing Connections (Client)**选项
• 重新运行Widget组件

完成以上操作后，Widget即可正常发起网络请求并解析API返回的数据。

内容的提问来源于stack exchange，提问作者bartzalewski