在 iOS 14 的 SwiftUI 中的主应用程序和小部件之间共享数据 [英] Share data between main App and Widget in SwiftUI for iOS 14

问题描述

@main
struct ClockWidgetExt: Widget {
    private let kind: String = "ClockWidgetExt"
    
    public var body: some WidgetConfiguration {
        StaticConfiguration(kind: kind, provider: Provider(), placeholder: PlaceholderView()) { entry in
            HomeTestView()
        }
        .configurationDisplayName("My Widget")
        .description("This is an example widget.")
    }
}

如何从我的主应用程序获取数据到小部件?

How can I get data from my Main App to the widget?

推荐答案

您可以为您的小部件和应用程序添加 AppGroup 功能 (这里 很好地解释了如何添加它.

You can add the AppGroup capability for both your Widget and App (here is a very good explanation how to add it).

代替

UserDefaults.standard

只需为您的 AppGroup 使用共享的 UserDefaults:

just use the shared UserDefaults for your AppGroup:

UserDefaults(suiteName: <your_app_group>)

然后你可以像这个答案中解释的那样读/写数据.

Then you can read/write data like explained in this answer.

通过 AppGroup 权限，您可以访问共享的文件容器:

With the AppGroup entitlement you get access to the shared File Container:

let containerURL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: <your_app_group>)!

并访问这样的网址:

let someFileURL = containerURL.appendingPathComponent("SomeFile.txt")

然后您可以使用您的共享文件容器，如本答案中所述:

Then you can use your shared File Container like explained in this answer:

• 如何读取由 iOS WidgetKit 应用创建的文件?

你也可以创建一个共享的 CoreData 容器:

You can create a shared CoreData container as well:

let storeURL = containerURL.appendingPathComponent("DataModel.sqlite")
let description = NSPersistentStoreDescription(url: storeURL)

let container = NSPersistentContainer(name: "DataModel")
container.persistentStoreDescriptions = [description]
container.loadPersistentStores { ... }

然后你可以使用你的共享 CoreData Container，就像这个答案中解释的那样:

Then you can use your shared CoreData Container like explained in this answer:

• 从 CoreData for iOS 14 小部件获取数据

_{这是一个 GitHub 存储库，其中包含不同的 Widget 示例，包括应用程序组小部件.}

_{Here is a GitHub repository with different Widget examples including the App Group Widget.}

这篇关于在 iOS 14 的 SwiftUI 中的主应用程序和小部件之间共享数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！