How do I set the toggle state in a foreach loop in SwiftUI

Question

When I try to set show a toggle inside a loop of value from a dictionary, I get very little help from the error message.

If I un-comment the 3 lines of commented co

Answer 1

The issue here is that the initializer Toggle(isOn:label:) takes a Binding for its isOn parameter rather than just a Bool. A Binding<_> is sort of a readable-writable "view" into a property that allows a control to update a value that it doesn't own and have those changes propagate out to whoever does own the property.

EDIT: I made this more complicated than it needed to be. The following works:

ForEach($propertyValues.identified(by: \.id.value)) { (propertyValue: Binding) in
    HStack {
        Toggle(isOn: propertyValue.isOn) {
            Text("")
        }
        // ...
    }
}

By using a $propertyValues, we are accessing a Binding to the array itself, which is transformed into bindings to each of the elements.

EDIT:

For the above to work, you'll need to add .value in a couple places in the body so that you are referring to the actual values and not the bindings to the values.