切换 iCloud 同步 iOS15 / SwiftUI

Question

I have recently added iCloud into my iOS15 / SwiftUI App and wanted to implement an on/off toggle for it. I have already researched all forum posts and the best solution I came up with is:

struct PersistenceController {
...
init(inMemory: Bool = false) {
    container = NSPersistentCloudKitContainer(name: "myAppName")
    
    if !iCloudSync {
        let description = container.persistentStoreDescriptions.first
        description?.cloudKitContainerOptions = nil
        description?.setOption(true as NSNumber,
                               forKey: NSPersistentHistoryTrackingKey)
...
    }
}

The problem with this is that it doesn't work during runtime. The user has to close and re-open the app.

I already tried to add an onChange modifier including the code snippet to the root view but this doesn't do the trick.

Is there a way to toggle iCloud Sync during runtime?

Answer 1

Of course it will not work because you initialized PersistenceController . What you can do is create a function in PersistenceController like so:

func toggleCloud() {
    container = NSPersistentCloudKitContainer(name: "myAppName")
    if !iCloudSync {
        let description = container.persistentStoreDescriptions.first
        description?.cloudKitContainerOptions = nil
        description?.setOption(true as NSNumber, forKey: NSPersistentHistoryTrackingKey)
        ...
    }
}

And call it when the toggle changes.