SwiftUI Helpers

SwiftUIHelpers.swift

import SwiftUI

// Overload that allows some bindings to be optional. E.g. having an optional
// property bound to the TextField
// TextField("", text: $optionalProperty ?? "default value")

func ??<T>(lhs: Binding<Optional<T>>, rhs: T) -> Binding<T> {
	Binding(
		get: { lhs.wrappedValue ?? rhs },
		set: { lhs.wrappedValue = $0 }
	)
}

//// BINDING EXTENSION

extension Binding {
    func onChange(_ handler: @escaping (Value) -> Void) -> Binding<Value> {
        Binding(
            get: { self.wrappedValue },
            set: { newValue in
                self.wrappedValue = newValue
                handler(newValue)
            }
        )
    }
}
// Example usage of onChange extension
TextField("Your name:", text: $name.onChange(nameChanged)

func nameChanged(to newValue: String) {
    // Do something when name has been changed
}