How to create a simple Binding for previews

Question

With the new @Binding delegate and previews, I find it kinda awkward to always have to create a @State static var to create the neccesarry binding:

struct TestView: View {     @Binding var someProperty: Double     var body: some View {         //...     } }  #if DEBUG struct TestView_Previews : PreviewProvider {     @State static var someProperty = 0.7     static var previews: some View {         TestView(someProperty: $someProperty)     } } #endif  

Is there a simpler way to create a binding, that proxies a simple values for testing and previewing?

Answer 1

You can use .constant(VALUE) in your Previews, no need to create a @State.

/// A value and a means to mutate it. @propertyWrapper public struct Binding<Value> {      /// Creates a binding with an immutable `value`.     public static func constant(_ value: Value) -> Binding<Value> } 

e.g.

TestView(someProperty: .constant(5.0))