I want to have an optional @ObservedObject in SwiftUI but I keep getting a compile time error of. Property type 'AModel?' does not match that of the 'wrappedValue' property of its wrapper type 'Obs...

I was wondering how would I be able to pass down a @FocusState to another view. Here is some example code: struct View1: View { enum Field { case username, password } @State var passwordText:...

I wish to apply a custom property wrapper to a variable already wrapped in @Published, nesting them like (A) @Custom @Published var myVar or (B) @Published @Custom var myVar (notice the application...

I'm trying to make a property wrapper similar to Combine's Published one(for my project needs), but with ability to modify the wrapped property by sending a value to a publisher, stored in projecte...

I have recently been experimenting with swift property wrappers and wondered if there was any way of composing them together in order to achieve a more modular architecture. E.g: @WrapperOne @Wrap...

I keep the Model as a Published var in the ViewModel and Observe it from the View. When the model process goes into a background thread, if you publish the model value, the Xcode thread check...

Problem In Order to achieve a clean look and feel of the App's code, I create ViewModels for every View that contains logic. A normal ViewModel looks a bit like this: class SomeViewModel: Observ...

Given the setup I've outlined below, I'm trying to determine why ChildView's .onChange(of: _) is not receiving updates. import SwiftUI struct SomeItem: Equatable { var doubleValue: Double } stru...

I understand that @Binding is a property wrapper and I believe that Binding<Type> is a form of type casting but what is the difference in practical terms? For example declaring a var like: @B...

I'm using a property wrapper to decode the strings "true" and "false" as Booleans. I also want to make the key optional. So if the key is missing from the JSON, it should be dec...

I'm attempting to create a custom property wrapper supported by SwiftUI, meaning that changes to the corresponding properties values would cause an update to the SwiftUI view. Here is a simplified ...

I have created a "lock" in Swift and an Atomic property wrapper that uses that lock, for my Swift classes as Swift lacks ObjC's atomic property attribute. When I run my tests with thread ...

I am trying to make a ObservableObject that has properties that wrap a UserDefaults variable. In order to conform to ObservableObject, I need to wrap the properties with @Published. Unfortunately,...

Trying to implement a custom property wrapper which would also publish its changes the same way @Publish does. E.g. allow my SwiftUI to receive changes on my property using my custom wrapper. The ...

I have been reading about the property wrappers in SwiftUI and I see that they do a great job, but one thing which I really don't get is the difference between @EnvironmentObject and @ObservedObjec...

The following code reproduced the error: import SwiftUI struct ContentView: View { @State private var number: Int = 5 var body: some View { NavigationView() { VStack(spacing: 20) { Navigatio...

I'm using Swift property wrappers to define something like: @MyWrapper var foo: Int And in the implementation of the property wrapper, I'd like to access the name of the variable, foo, as a stri...

I am using a property wrapper to save my User Default values. On iOS 13 devices, this solution works great. However on iOS 11 and iOS 12, the values are not being saved into User Defaults. I read t...

How can I use Binding(get: { }, set: { }) custom binding with @Binding property on SwiftUI view. I have used this custom binding successfully with @State variable but doesn't know how to apply it t...

We now have a new way to make a lazy variable. It is described in swift-evolution/proposals/0258-property-wrappers.md: @propertyWrapper enum Lazy<Value> { case uninitialized(() -> Value)...

This tutorial by Apple about SwiftUI uses a dollar sign to bind data, and I‘m having trouble finding more information about this data binding in SwiftUI. Toggle(isOn: $showFavoritesOnly) { You...