How Change @ObservedResults filter with UserDefaults (In SwiftUI)

Question

Here is my Code Block

@AppStorage("shareSelection") var shareSelection = "BTCUSDT"
@ObservedResults(coinModel.self, where: ( { $0.s == (UserDefaults.standard.object(forKey: "shareSelection") as? String) ?? ""}))  var coinsResult

 var body: some View {

Text (coinsResult[0].s)
}

I change UserDefault Other View

    @AppStorage("shareSelection") var shareSelection = "BTCUSDT"

     var body: some View {

 Button {
         shareSelection = "ETHUSDT"
                                            
         }label: { SearchSideMenuRow(market: coin)}

But ObservedResults not Change first View . I checked UserDefaults, Its Ok. Chanced. How can Refresh ObservedResult.. Thanks ..

ObservedResults are part of the Realm SDK and unrelated to UserDefaults which is an operating system property. It may be a good idea to review Apple's docs on [User Defaults](https://developer.apple.com/documentation/foundation/userdefaults). That being said, the question is unclear - ObservedResults don't need to be refreshed - that's automatic. From the [Docs](https://www.mongodb.com/docs/realm/sdk/swift/swiftui/react-to-changes/#observe-query-results) *You can perform a quick write to an ObservedResults collection, and the view automatically updates itself when the observed query changes* — Jay, Feb 07 '23 at 21:43

score 0 · Answer 1 · answered Aug 16 '23 at 07:51

You can assign NSPredicate to filter property of @ObservedSectionedResults.

E.g.

struct MyView: View {
    @AppStorage("selected_date_range")
    var selectedDateRange: TimeContraints = .last30

    @ObservedSectionedResults(CountryEntry.self, sectionKeyPath: \.country)
    var countries

    var body: some View {
       VStack {
          ...view code
       }
    }
    .onChange(of: selectedDateRange) { range in
        $countries.filter = NSPredicate(
            format: "createdAt > %@", 
            selectedDateRange.startDate as NSDate
        )
    }
    .onAppear {
       $countries.filter = NSPredicate(
           format: "createdAt > %@", 
           selectedDateRange.startDate as NSDate
       )
    }
}

How Change @ObservedResults filter with UserDefaults (In SwiftUI)

1 Answers1