# Bindable A property wrapper type that supports creating bindings to the mutable properties of observable objects. ``` @dynamicMemberLookup @propertyWrapper struct Bindable ``` ## Overview Use this property wrapper to create bindings to mutable properties of a data model object that conforms to the protocol. For example, the following code wraps the `book` input with `@Bindable`. Then it uses a [`TextField`](/documentation/SwiftUI/TextField) to change the `title` property of a book, and a [`Toggle`](/documentation/SwiftUI/Toggle) to change the `isAvailable` property, using the `$` syntax to pass a binding for each property to those controls. ``` @Observable class Book: Identifiable { var title = "Sample Book Title" var isAvailable = true } struct BookEditView: View { @Bindable var book: Book @Environment(\.dismiss) private var dismiss var body: some View { Form { TextField("Title", text: $book.title) Toggle("Book is available", isOn: $book.isAvailable) Button("Close") { dismiss() } } } } ``` You can use the `Bindable` property wrapper on properties and variables to an object. This includes global variables, properties that exists outside of SwiftUI types, or even local variables. For example, you can create a `@Bindable` variable within a view’s [`body`](/documentation/SwiftUI/View/body-8kl5o): ``` struct LibraryView: View { @State private var books = [Book(), Book(), Book()] var body: some View { List(books) { book in @Bindable var book = book TextField("Title", text: $book.title) } } } ``` The `@Bindable` variable `book` provides a binding that connects [`TextField`](/documentation/SwiftUI/TextField) to the `title` property of a book so that a person can make changes directly to the model data. Use this same approach when you need a binding to a property of an observable object stored in a view’s environment. For example, the following code uses the [`Environment`](/documentation/SwiftUI/Environment) property wrapper to retrieve an instance of the observable type `Book`. Then the code creates a `@Bindable` variable `book` and passes a binding for the `title` property to a [`TextField`](/documentation/SwiftUI/TextField) using the `$` syntax. ``` struct TitleEditView: View { @Environment(Book.self) private var book var body: some View { @Bindable var book = book TextField("Title", text: $book.title) } } ``` ## Topics ### Creating a bindable value [`init(_:)`](/documentation/SwiftUI/Bindable/init(_:)) Creates a bindable object from an observable object. [`init(wrappedValue:)`](/documentation/SwiftUI/Bindable/init(wrappedValue:)) Creates a bindable object from an observable object. [`init(projectedValue:)`](/documentation/SwiftUI/Bindable/init(projectedValue:)) Creates a bindable from the value of another bindable. ### Getting the value [`wrappedValue`](/documentation/SwiftUI/Bindable/wrappedValue) The wrapped object. [`projectedValue`](/documentation/SwiftUI/Bindable/projectedValue) The bindable wrapper for the object that creates bindings to its properties using dynamic member lookup. [`subscript(dynamicMember:)`](/documentation/SwiftUI/Bindable/subscript(dynamicMember:)) Returns a binding to the value of a given key path. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)