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The @Binding property wrapper

Two way binding

Steven Curtis
3 min readJul 8, 2023
Photo by Aaron Burden on Unsplash

Although I’ve labeled this article as beginner, I’ve noticed that my previous article about property wrappers just didn’t make it seem so. So I think it really asks for a new article about the @Binding property wrapper.

The image? Books are bound, things are bound together. I guess that is the root of the meaning of @Binding, bit we will get there in this article if you just read on!

Difficulty: Beginner | Easy | Normal | Challenging

Prerequisites:

Terminology

Property Wrapper: A property wrapper adds a layer of separation between code that manages how a property is stored and the code that defines a property

@Binding: The @Binding property wrapper enables a two-way connection between a property which stores data and a view that displays and mutates that data.

The @Binding property wrapper

In Swift, @Binding is used for a two-way connection between a property and a view. When you need to pass a value type from a parent view to a child view (and wish the child view to mutate the value) the @Binding keyword is the answer to the problem.

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