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Binding value from an ObservableObject
Aim:I have a model which is an ObservableObject. It has a Bool property, I would like to use this Bool property to initialise a @Binding variable.Questions:How to convert an @ObservableObject to a @Binding ?Is creating a @State the only way to initialise a @Binding ?Note:I do understand I can make use of @ObservedObject / @EnvironmentObject, and I see it's usefulness, but I am not sure a simple button needs to have access to the entire model.Or is my understanding incorrect ?Code:import SwiftUI import Combine import SwiftUI import PlaygroundSupport class Car : ObservableObject { @Published var isReadyForSale = true } struct SaleButton : View { @Binding var isOn : Bool var body: some View { Button(action: { self.isOn.toggle() }) { Text(isOn ? "On" : "Off") } } } let car = Car() //How to convert an ObservableObject to a Binding //Is creating an ObservedObject or EnvironmentObject the only way to handle a Observable Object ? let button = SaleButton(isOn: car.isReadyForSale) //Throws a compilation error and rightly so, but how to pass it as a Binding variable ? PlaygroundPage.current.setLiveView(button)
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Sep ’21
Binding value from an ObservableObject
Aim:I have a model which is an ObservableObject. It has a Bool property, I would like to use this Bool property to initialise a @Binding variable.Questions:How to convert an @ObservableObject to a @Binding ?Is creating a @State the only way to initialise a @Binding ?Note:I do understand I can make use of @ObservedObject / @EnvironmentObject, and I see it's usefulness, but I am not sure a simple button needs to have access to the entire model.Or is my understanding incorrect ?Code:import SwiftUI import Combine import SwiftUI import PlaygroundSupport class Car : ObservableObject { @Published var isReadyForSale = true } struct SaleButton : View { @Binding var isOn : Bool var body: some View { Button(action: { self.isOn.toggle() }) { Text(isOn ? "On" : "Off") } } } let car = Car() //How to convert an ObservableObject to a Binding //Is creating an ObservedObject or EnvironmentObject the only way to handle a Observable Object ? let button = SaleButton(isOn: car.isReadyForSale) //Throws a compilation error and rightly so, but how to pass it as a Binding variable ? PlaygroundPage.current.setLiveView(button)
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Sep ’21