在iOS的SwiftUI中的主应用程序和小部件之间共享数据14 [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将数据获取到小部件?

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

推荐答案

您可以为小部件和应用程序添加 AppGroup 功能(

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，您可以按照此答案中的说明读取/写入数据.

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

使用AppGroup授权，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>)!

并访问如下网址:

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

然后，您可以按照此答案中的说明使用共享文件容器:

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

• 如何通过iOS WidgetKit读取由应用创建的文件?

您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，您可以按照此答案中的说明使用共享的CoreData容器:

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

• 从CoreData中为iOS 14小部件获取数据

_{这是一个 GitHub存储库，其中包含包括应用程序组在内的不同窗口小部件示例小部件.}

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

这篇关于在iOS的SwiftUI中的主应用程序和小部件之间共享数据14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！